Details of this Paper

Statstics questions

Description

solution


Question

Question;Question 1 of 23;1.0 Points;The;data presented in the table below resulted from an experiment in which;seeds of 5 different types were planted and the number of seeds that;germinated within 5 weeks after planting was recorded for each seed;type. At the.01 level of significance, is the proportion of seeds;that germinate dependent on the seed type?;Seed;Type;Observed Frequencies;Germinated;Failed to Germinate;1;31;7;2;57;33;3;87;60;4;52;44;5;10;19;A.Yes;because the test value 16.86 is greater than the critical value of 13.28;B.Yes;because the test value 16.86 is less than the critical value of 14.86;C.No;because the test value 16.86 is greater than the critical value of 13.28;D.No;because the test value 13.28 is less than the critical value of 16.86;Reset Selection;Question 2 of 23;1.0 Points;A;company operates four machines during three shifts each day. From;production records, the data in the table below were collected. At the;.05 level of significance test to determine if the number of breakdowns is;independent of the shift.;Machine;Shift;A;B;C;D;1;41;20;12;16;2;31;11;9;14;3;15;17;16;10;A.The;number of breakdowns is dependent on the shift, because the test value;11.649 is less than the critical value of 12.592.;B.The;claim that the number of breakdowns is independent of the shift cannot be;rejected, because the test value 11.649 is less than the critical value;of 12.592.;C.The;number of breakdowns is dependent on the shift, because the p-value is;.07.;D.The;number of breakdowns is independent of the shift, because the test value;12.592 is greater than the critical value of 11.649.;Reset Selection;Part 2;of 16 -;Question 3 of 23;1.0 Points;Outliers;are observations that;A.disrupt;the entire linear trend;B.render;the study useless;C.lie;outside the sample;D.lie;outside the typical pattern of points;Reset Selection;Question 4 of 23;1.0 Points;If an;estimated regression line has a Y-intercept of ?7.5 and a slope of 2.5;then when X = 3, the actual value of Y is;A.10;B.0;C.unknown;D.5;Reset Selection;Question 5 of 23;1.0 Points;Data for a sample of 25 apartments in a particular neighborhood are;provided in the worksheet Apartments in the Excel workbook Apartments.xlsx.;Using that data, find the estimated regression equation which can be;used to estimate the monthly rent for apartments in this neighborhood using;size as the predictor variable.Apartments.xlsx;A.177.12 + 0.8500(size);B.1.065 + 177.12(size);C. 177.12 + 1.065(size);D.197.12 + 2.065(size);Reset Selection;Part 3;of 16 -;Question 6 of 23;1.0 Points;Two;teams of workers assemble automobile engines at a manufacturing plant in;Michigan. A random sample of 145 assemblies from team 1 shows 15;unacceptable assemblies. A similar random sample of 125 assemblies from;team 2 shows 8 unacceptable assemblies.;Is there sufficient evidence to conclude, at the 10% significance level;that the two teams differ with respect to their proportions of unacceptable;assemblies?;A.No;since the p-value is less than 0.10;B.No;since the test value exceeds the critical value;C.No;since the test value does not exceed the critical value;D.Yes;since the p-value is greater than 0.10;Reset Selection;Question 7 of 23;1.0 Points;Multiple;myeloma or blood plasma cancer is characterized by increased blood vessel;formulation in the bone marrow that is a prognostic factor in;survival. One treatment approach used for multiple myeloma is stem;cell transplantation with the patient?s own stem cells. The following;data represent the bone marrow microvessel density for a sample of 7;patients who had a complete response to a stem cell transplant as measured;by blood and urine tests. Two measurements were taken: the first;immediately prior to the stem cell transplant, and the second at the time;of the complete response.;Patient;1;2;3;4;5;6;7;Before;158;189;202;353;416;426;441;After;284;214;101;227;290;176;290;Suppose you wanted to conduct a test of hypothesis to determine;if there is sufficient evidence to conclude that the mean bone;marrow microvessel density is higher before the stem cell transplant than;after the stem cell transplant? What is the p-value associated;with the test of hypothesis you would conduct?;A.p;=.057493;B.p;=.942597;C.p;=.885014;D.p;=.114986;Reset Selection;Part 4;of 16 -;Question 8 of 23;1.0 Points;A;two-tailed test is one where;A.negative;sample means lead to rejection of the null hypothesis;B.results;in only one direction can lead to rejection of the null hypothesis;C.no;results lead to the rejection of the null hypothesis;D.results;in either of two directions can lead to rejection of the null hypothesis;Reset Selection;Question 9 of 23;1.0 Points;You;conduct a hypothesis test and you observe values for the sample mean and;sample standard deviation when n = 25 that do not lead to the rejection of;H0. You calculate a p-value of 0.0667. What will happen to the;p-value if you observe the same sample mean and standard deviation for a;sample size larger than 25?;A.The;p ? value stays the same;B.The;p ? value may increase or decrease;C.The;p ? value decreases;D.The;p ? value increases;Reset Selection;Question 10 of 23;1.0 Points;A type;II error occurs when;A.the;null hypothesis is incorrectly accepted when it is false;B.the;sample mean differs from the population mean;C.the;null hypothesis is incorrectly rejected when it is true;D.the;test is biased;Reset Selection;Part 5;of 16 -;Question 11 of 23;1.0 Points;In;constructing a confidence interval estimate for a population mean, when we;replace with the sample standard;deviation (s), we introduce a new source of variability and the sampling;distribution we use is;A.F-;distribution;B.the;normal distribution;C.chi-square;distribution;D.t;-distribution;Reset Selection;Question 12 of 23;1.0 Points;If you;are constructing a confidence interval for a single mean, the confidence;interval will___________ with an increase in the sample size.;A.increase;B.decrease;C.stay;the same;D.increase;or decrease, depending on the sample data;Reset Selection;Part 6;of 16 -;Question 13 of 23;1.0 Points;The;standard normal distribution has a mean of ___ and standard deviation of;___, respectively.;A.1;and 1;B.0;and 0;C.0;and 1;D.1;and 0;Reset Selection;Part 7;of 16 -;Question 14 of 23;1.0 Points;One of;the requirements for a binomial experiment is that there must be a(n);number of trials.;A.infinite;B.fixed;C.odd;D.random;Reset Selection;Part 8;of 16 -;Question 15 of 23;1.0 Points;If 25;tickets are sold and 2 prizes are to be awarded, find the probability that;one person will win both prizes if that person buys exactly 2 tickets.;A.1/600;B.1/700;C.1/2300;D.1/300;Reset Selection;Part 9;of 16 -;Question 16 of 23;3.0 Points;Accepted;characters;numbers, decimal point markers (period or comma), sign indicators (-);spaces (e.g., as thousands separator, 5 000), "E" or;"e" (used in scientific notation). NOTE: For;scientific notation, a period MUST be used as the decimal point;marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;A sport preference poll yielded;the following data for men and women. Use a 5% significance level and;test to determine if sport preference and gender are independent.;Sport Preferences of Men and;Women;Basketball;Football;Soccer;Men;20;25;30;75;Women;18;12;15;45;38;37;45;120;What is the test value for this hypothesis test?;Answer: Round;your answer to two decimal places.;What is the critical value for this hypothesis test?;Answer;Round your answer to two decimal places.;What is the conclusion for this hypothesis test? Choose one.;1. Thereis;sufficient evidence to support the claim that one's sport preference is;dependent on one's gender.;2. Thereis not sufficient evidence to;support the claim that one's sport preference is dependent on one's gender.;Answer;Enter only a 1 or 2 for your answer.;Part;10 of 16 -;Question 17 of 23;1.0 Points;Accepted;characters;numbers, decimal point markers (period or comma), sign indicators (-);spaces (e.g., as thousands separator, 5 000), "E" or;"e" (used in scientific notation). NOTE: For;scientific notation, a period MUST be used as the decimal point;marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;A company has observed that there is a linear relationship between indirect;labor expense (ILE), in dollars, and direct labor hours (DLH). Data for;direct labor hours and indirect labor expense for 18 months are given in;the fileILE_and_DLH.xlsx;Treating ILE as the response;variable, use regression to fit a straight line to all 18 data;points. What values for the intercept (a) and slope;(b) do you obtain?;Place your answers, rounded to 3 decimal places, in the blanks;provided. Do not use any stray punctuation marks. For;example, 34.567 would be a legitimate entry.;intercept (a) =;slope(b) =;Part;11 of 16 -;Question 18 of 23;1.0 Points;Accepted;characters;numbers, decimal point markers (period or comma), sign indicators (-);spaces (e.g., as thousands separator, 5 000), "E" or;"e" (used in scientific notation). NOTE: For;scientific notation, a period MUST be used as the decimal point;marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;Two teams of workers assemble automobile engines at a manufacturing plant;in Michigan. A random sample of 145 assemblies from team 1 shows 15;unacceptable assemblies. A similar random sample of 125 assemblies from;team 2 shows 8 unacceptable assemblies.;If you are interested in determining if there is sufficient evidence to;conclude, at the 10% significance level, that the two teams differ with;respect to their proportions of unacceptable assemblies, what is the test;value you would use to conduct such a test of hypothesis?;Place your answer, rounded to 2 decimal places, in the blank. For example;2.34 would be a legitimate entry.;Part;12 of 16 -;Question 19 of 23;1.0 Points;Accepted;characters;numbers, decimal point markers (period or comma), sign indicators (-);spaces (e.g., as thousands separator, 5 000), "E" or;"e" (used in scientific notation). NOTE: For;scientific notation, a period MUST be used as the decimal point;marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;In a particular region of Cape;Cod, it is known that lobstermen trap on average of 32 pounds of lobster;per day with a standard deviation of four pounds. If a random sample of 30;lobster fishermen is selected, what is the probability that their average;catch is less than 31.5 pounds?;Place your answer, rounded;to four decimal places, in the blank.;When entering your answer do not use any labels or symbols other than a;decimal point. Simply provide the numerical value. For example;0.1234 would be a legitimate entry.;Part;13 of 16 -;Question 20 of 23;1.0 Points;Accepted;characters;numbers, decimal point markers (period or comma), sign indicators (-);spaces (e.g., as thousands separator, 5 000), "E" or;"e" (used in scientific notation). NOTE: For;scientific notation, a period MUST be used as the decimal point;marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;The personnel department of a large corporation wants to estimate the;family dental expenses of its employees to determine the feasibility of;providing a dental insurance plan. A random sample of 12 employees reveals;the following family dental expenses (in dollars): 115, 370, 250, 593, 540;225, 177, 425, 318, 182, 275, and 228.;Construct a 99% confidence interval estimate for the standard deviation of;family dental expenses for all employees of this corporation.;Place your LOWER limit, in dollars rounded to 1 decimal place, in the first;blank. Do not use a dollar sign, a comma, or any other stray mark. For;example, 98.4 would be a legitimate entry.;Place your UPPER limit, in dollars rounded to 1 decimal place, in the;second blank. Do not use a dollar sign, a comma, or any other stray mark.;For example, 567.8 would be a legitimate entry.;Part;14 of 16 -;Question 21 of 23;1.0 Points;Accepted;characters;numbers, decimal point markers (period or comma), sign indicators (-);spaces (e.g., as thousands separator, 5 000), "E" or;"e" (used in scientific notation). NOTE: For;scientific notation, a period MUST be used as the decimal point;marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;In a survey, 55% of the voters support a particular referendum. If 40;voters are chosen at random, and X is the number of voters that support;this referendum, find the mean and variance of X. Place the mean in the;first blank and;place the variance in the second blank.;Part;15 of 16 -;Question 22 of 23;1.0 Points;Accepted;characters;numbers, decimal point markers (period or comma), sign indicators (-);spaces (e.g., as thousands separator, 5 000), "E" or;"e" (used in scientific notation). NOTE: For scientific;notation, a period MUST be used as the decimal point marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;A survey determines that mint chocolate chip is the favorite ice cream;flavor of 6% of consumers. An ice cream shop determines that of 260;customers, 20 customers stated their preference for mint chocolate;chip.;Find the P-value that would be used to determine if the percentage of;customers who prefer mint chocolate chip ice has increased at a 5% level of;significance.;P-value: Round;your answer to four decimal places as necessary.;Part;16 of 16 -;Question 23 of 23;1.0 Points;Accepted characters: numbers, decimal point markers (period or comma), sign;indicators (-), spaces (e.g., as thousands separator, 5 000), "E;or "e" (used in scientific notation). NOTE: For;scientific notation, a period MUST be used as the decimal point marker.;Complex numbers should be in the form (a + bi) where "a" and;"b" need to have explicitly stated values.;For example: {1+1i} is valid whereas {1+i} is not. {0+9i} is valid whereas;{9i} is not.;If a set of six books is to be placed on a shelf, in how many ways can the;six books be arranged? Place your answer in the blank. Do not use any;decimal places or commas. For example, 45 would be a legitimate;entry.

 

Paper#62280 | Written in 18-Jul-2015

Price : $37
SiteLock