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Answer the following problems showing your work and explaining (or analyzing) your results




Question;Answer the following problems showing your work and;explaining (or analyzing) your results.;The;math grades on the final exam varied greatly. Using the scores below, how;many scores were within one standard deviation of the mean? How many;scores were within two standard deviations of the mean? 99 34 86 57 73 85;91 93 46;96 88 79;68 85 89;The;scores for math test #3 were normally distributed. If 15 students had a;mean score of 74.8% and a standard deviation of 7.57, how many students;scored above an 85%?If you;know the standard deviation, how do you find the variance?To get;the best deal on a stereo system, Louis called eight appliance stores and;asked for the cost of a specific model. The prices he was quoted are listed;below: $216 $135 $281 $189 $218 $193 $299 $235;Find the standard deviation.;A;company has 70 employees whose salaries are summarized in the frequency;distribution below.;Salary;Number of Employees;5,001?10,000;8;10,001?15,000;12;15,001?20,000;20;20,001?25,000;17;25,001?30,000;13;Find;the standard deviation.Find;the variance.6. Calculate the mean and variance of;the data. Show and explain your steps. Round to the nearest tenth.;14, 16, 7, 9, 11, 13, 8, 10;Create;a frequency distribution table for the number of times a number was rolled;on a die. (It may be helpful to print or write out all of the numbers so;none are excluded.);3, 5, 1, 6, 1, 2, 2, 6, 3, 4, 5, 1, 1, 3, 4, 2, 1, 6, 5, 3, 4, 2, 1, 3, 2, 4, 6, 5, 3, 1;Answer;the following questions using the frequency distribution table you created;in No. 7.Which;number(s) had the highest frequency?How;many times did a number of 4 or greater get thrown?How;many times was an odd number thrown?How;many times did a number greater than or equal to 2 and less than or equal;to 5 get thrown?The;wait times (in seconds) for fast food service at two burger companies were;recorded for quality assurance. Using the data below, find the following;for each sample.RangeStandard;deviationVarianceLastly, compare the two sets of results.;Company;Wait times in seconds;Big Burger Company;105;67;78;120;175;115;120;59;The Cheesy Burger;133;124;200;79;101;147;118;125;What;does it mean if a graph is normally distributed? What percent of values;fall within 1, 2, and 3, standard deviations from the mean?


Paper#60345 | Written in 18-Jul-2015

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