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##### math 302 statistics midterm

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Question;anyone want to answer these statistics quiz questions?? i have accounting work for trade or money...name you price...nothing to outrageous only 25 questions here math 302;Question 1 of 25;1.0;Points;A histogram that has a single peak and looks approximately;the same to the left and right of the peak is called;A.symmetric;B.proportional;C.bimodal;D.balanced;Reset Selection;Part 2 of 9 -;Question 2 of 25;1.0;Points;Sue has 10 pictures but only has space in her apartment to;hang 4 of them on a wall. The number of different arrangements of four pictures;from a selection of ten pictures is;A.210;B.151,200;C.24;D.5,040;Reset Selection;Question 3 of 25;1.0;Points;If P(A) = 0.25 and P(B) = 0.65, then P(A and B) is;A.0.90;B.0.25;C.0.40;D.Cannot be determined from the information given;Reset Selection;Part 3 of 9 -;Question 4 of 25;1.0;Points;The probability distribution associated with the number of;cartoons watched by Mrs. Kelly's first grade class on Saturday morning is shown;below.;x;P(x);0;0.15;1;0.20;2;0.30;3;0.10;4;0.20;5;0.05;Find the;standard deviation for the probability distribution above.;A.1.46;B.2.25;C.1.89;D.1.18;Reset Selection;Question 5 of 25;1.0;Points;The failure rate for taking the bar exam in Philadelphia is;41%. If 375 people take the bar exam, what is the mean for the number of;failures?;A.138.1;B.171.2;C.90.7;D.153.8;Reset Selection;Question 6 of 25;1.0;Points;Find the variance of the following probability distribution.;X P(X);1 0.10;2 0.35;3 0.10;4 0.15;5 0.30;A.1.44;B.2.06;C.1.76;D.1.2;Reset Selection;Part 4 of 9 -;Question 7 of 25;1.0;Points;If Z is a standard normal random variable, then the value z;for which P(-z < Z < z) equals 0.8764 is;A.1.16;B.1.54;C.0.3764;D.3.08;Reset Selection;Question 8 of 25;1.0;Points;If Z is a standard normal random variable, the area between;z = 0.0 and z =1.30 is 0.4032, while the area between z = 0.0 and z = 1.50 is;0.4332. What is the area between z = -1.30 and z = 1.50?;A.0.0968;B.0.8364;C.0.0668;D.0.0300;Reset Selection;Question 9 of 25;1.0;Points;The mean of a probability distribution is a;A.measure of variability of the distribution;B.measure of skewness of the distribution;C.measure of relative likelihood;D.measure of central location;Reset Selection;Question 10 of 25;1.0;Points;The standard normal distribution has a mean of ___ and;standard deviation of ___, respectively.;A.0 and 0;B.1 and 1;C.0 and 1;D.1 and 0;Reset Selection;Question 11 of 25;1.0;Points;The standard deviation of f$ar{X},f$ is usually called the;A.standard error of the population;B.randomized standard error;C.standard error of the mean;D.standard error of the sample;Reset Selection;Question 12 of 25;1.0;Points;Find the probability, P(Z < 0.17), using the standard;normal distribution.;A..8300;B..4325;C..5675;D..0675;Reset Selection;Part 5 of 9 -;Question 13 of 25;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 statistics professor has just given a final examination in;his statistical inference course. He is particularly interested in learning how;his class of 40 students performed on this exam. The scores are shown below.;77 81 74 77 79 73 80 85 86 73;83 84 81 73 75 91 76 77 95 76;90 85 92 84 81 64 75 90 78 78;82 78 86 86 82 70 76 78 72 93;What is the median score on this exam? Place your answer;rounded to two decimal places in the blank. For example, 65.78 would be a legitimate;entry.;Part 6 of 9 -;Question 14 of 25;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.;Find the mean of the following probability distribution.;X 1 2 3;4 5;P(X) 0.20 0.10 0.35;0.05 0.30;Round your answer to two decimal place as necessary. For;example, 4.56 would be a legitimate entry.;Mean =;Question 15 of 25;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 annual returns, in percentages, on stocks A and B for;three possible states of the economy are given in the table below.;Economy State;Probability;StockA;StockB;Good;0.5;40;20;Average;0.3;20;40;Bad;0.2;10;8;If one invested in StockA, what would be the standard;deviation of the percentage return? Place your answer, in percent rounded to 1;decimal place, in the blank. For example, a standard deviation of 10.39 percent;would be reported as 10.4. Do not use a percent sign.;Part 7 of 9 -;Question 16 of 25;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 Major League Baseball there are five teams in the Western;Division of the National League: Arizona, Los Angeles, San Francisco, San;Diego, and Colorado. How many different orders of finish are there for these;five teams? Place your answer in the blank. Do not use any decimal places or;commas. For example, 45 would be a legitimate entry.;Question 17 of 25;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.;An ice cream vendor sells three flavors: chocolate;strawberry, and vanilla. Forty five percent of the sales are chocolate, while;30% are strawberry, with the rest vanilla flavored. Sales are by the cone or;the cup. The percentages of cones sales for chocolate, strawberry, and vanilla;are 75%, 60%, and 40%, respectively. For a randomly selected sale, define the;following events;f$A_{1}f$ = chocolate chosen;f$A_{2}f$ = strawberry chosen;f$A_{3}f$ = vanilla chosen;f$Bf$ = ice cream on a cone;f$ar{B}=f$ ice cream in a cup;Find the probability that the ice cream was sold in a cup;and was strawberry flavor. Place your answer, rounded to 2 decimal places, in;the blank. For exampe, 0.34 would be a legitimate entry.;Part 8 of 9 -;Question 18 of 25;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 popular retail store knows that the purchase amounts by;its customers is a random variable that follows a normal distribution with a;mean of $30 and a standard deviation of $9.;What are the two dollar amounts, equidistant from the mean;of $30, such that 90% of all customer purchases are between these values? Place;your answers in the blanks provided. Do not include a dollar sign. For example;14.25 would be a legitimate entry.;Lower value;Upper value;Question 19 of 25;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 Wendyâ€™s fast-food restaurant sells hamburgers and chicken;sandwiches. On a typical weekday, the demand for hamburgers is normally;distributed with a mean of 450 and standard deviation of 80 and the demand for;chicken sandwiches is normally distributed with a mean of 120 and standard;deviation of 30.;How many hamburgers must the restaurant stock to be 99% sure;of not running out on a given day? Place you answer, rounded to the nearest;whole number in the blank. For example, 345 would be a legitimate entry.;Question 20 of 25;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 set of final exam scores in an organic chemistry course;was found to be normally distributed, with a mean of 73 and a standard;deviation of 8.;What is the probability of getting a score of 91 or less on;this exam? Place your answer, rounded to 4 decimal places in the blank. For;example, 0.3456 would be a legitimate entry.;Question 21 of 25;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 mean weight of loads of coal placed in train cars by a;loading machine is 43.0 tons with a standard deviation of 8.0 tons. Assuming;that the weight of loads placed in the train cars by this loader are normally;distributed, if a random sample of 9 loads is chosen for a weight check, find;the probability that the mean weight of those loads is more than 40.60 tons.;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.;Question 22 of 25;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.;Suppose that the average weekly earnings for employees in;general automotive repair shops is $450, and that the standard deviation for;the weekly earnings for such employees is $50. A sample of 100 such employees;is selected at random.;Find the standard deviation of the sampling distribution of;the means of average weekly earnings for samples of size 100. Place your answer;in the blank. Do not include a dollar sign. For example, 7 would be a;legitimate entry.;Question 23 of 25;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 popular retail store knows that the purchase amounts by;its customers is a random variable that follows a normal distribution with a;mean of $30 and a standard deviation of $9.;What is the probability that a randomly selected customer;will spend less than $15 at this store? Place your answer, rounded to 4 decimal;places, in the blank. For example, 0.3456 would be a legitimate entry.;Part 9 of 9 -;Question 24 of 25;1.0;Points;A random variable X is normally distributed with a mean of;100 and a variance of 25. Given that X = 110, its corresponding Z- score is;0.40.;True;False;Reset Selection;Question 25 of 25;1.0;Points;The sampling distribution of the mean will have the same;standard deviation as the original population from which the samples were drawn.;True;False;Reset Selection

Paper#62293 | Written in 18-Jul-2015

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