Wednesday, February 10, 2021

MA 260 MA260 STATISTICAL ANALYSIS I EXAM 3 ANSWERS (2021) - ASHWORTH

 MA 260 MA260 STATISTICAL ANALYSIS I EXAM 3 ANSWERS (2021) - ASHWORTH

 

 

 

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Ashworth MA260 Statistical Analysis I Exam 3 Answers (2021)

1. A population has a mean  and standard deviation  Find the z-score for a population value of 13.
2. The following table presents the number of monthly users for the 7 most popular mobile apps.
3. The table below lists the populations, in thousands, of several rural western counties. What is the mean population?
4. The following data represent the ice cream flavor choices of 20 diners at a college cafeteria.
5. Find the median for the following data set:
6. Approximate the sample variance given the following frequency distribution.
7. Find the mean for the following data set:
8. For which of the following histograms is it appropriate to use the Empirical Rule?
9. The following data represent the total price, in dollars, of 20 randomly-selected gasoline purchases at a certain convenience store.
10. Find the sample standard deviation for the following data set:
11. A soft-drink bottling company fills and ships soda in plastic bottles with a target volume of 354 milliliters. The filling machinery does not deliver a perfectly consistent volume of liquid to each bottle, and the three quartiles for the fill volume are   and 
12. Find the mean for the following data set:
13. A survey found that the median number of calories consumed per day in a certain country was 3,304 and the mean was 3,204.9 calories. If a histogram were constructed for the data, would you expect it to be skewed to the right, to the left, or approximately symmetric?
14. Following are the closing prices (in dollars) of a certain stock for the past 20 trading days.
15. Find the mean for the following data set:
16. The mean salary of professional baseball players is $2.58 million with a standard deviation of 0.33. A new player is hired with a salary of $2.76 million. What is the z-score of this salary?
17. The following table presents the number of monthly users for the 7 most popular mobile apps.
18. A report states that the mean household income last year for a certain rural county was $46,200 and the median was $37,800. If a histogram were constructed for the incomes of all households in the county, would you expect it to be skewed to the right, to the left, or approximately symmetric?
19. For the data set below, find the 37th percentile.
20. Approximate the sample standard deviation given the following frequency distribution.

 

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