Question

Use the following data to answer questions 7 - 9:

A sample of employees participated in a

survey of job satisfaction provided information about their hourly wages as the following:

11 14 19 11 17

20 25 11 16 17

14 22 12 24 29

16 18 18 11 21

20 11 29 24 23

14 28 19 29 14

20 26 23 24 18

18 23 20 29 12

23 18 25 26 27

28 22 11 25 19

1) What is the 60^{th} percentile of the employee hourly wages? Use the method explained in textbook for answering this question (using excel).

A. 26

B. 26.3

C. 22

D. 27

2) What is the standard deviation of hourly wages for this sample of employees (using excel)?

A. 35.22

B. 24.8

C. 6.18

D. 5.66

Use this information to answer questions 10 and 11:

Kangaroo trucking Inc. keeps mileage records when changing tires to determine the average life of each brand, in order to optimize their costs of purchasing and replacing tires. Lifetime of a tire depends on quality of the tire, quality of the road, temperature, and weight of the cargo. During the past 12 months AFC have collected data about a new type of Bonafici tires, summarized as the following:

Mileage used Number of tires

40000 to under 45000 175

45000 to under 50000 173

50000 to under 55000 170

55000 to under 60000 160

60000 to under 65000 209

65000 to under 70000 229

10) What is the average life of each tire?

A. Less than 50,000 miles

B. 53082.75

C. 55824.37

D. Greater than or 60,000 miles

11) What is the standard deviation of recorded mileages for these tires?

A. Less than 7,000 miles

B. 7324.74

C. 7700.54

D. Greater than 8,500 miles

**Use the following data to answer questions 12 - 14:**

This table lists ** ALL** ice cream flavors sold at Billy Bob's Ice Cream shop in Apple, Iowa and the number of gallons of each sold during this year and last year's summer.

**Flavor**

**Total Gallons Sold This Summer Total Gallons Sold Last Summer **

Vanilla 37,259 55,343

Chocolate 107,948 76,855

Strawberry 25,539 22,436

Maple Walnut 15,618 11432

Praline 19,512 14,609

Butter Pecan 8836 16,253

Chocolate Chip 36,889 35,395

Mint Chocolate Chip 16,167 18,935

Cookie Dough 24,674 23443

Rocky Road 18,103 16,496

Fudge Swirl 21,637 18,394

Peach 21,979 23,504

1) Find the interquartile range (IQR) for last year sales of different flavors, using excel. This value is:

A. Less than 12,000

B. 12750

C. 16108.5

D. Greater than 17,000

2) Consider this year's sales only. What is the Z score for Maple Walnut flavor sales?

A. -0.56

B. 0.56

C. 2.32

D. 6.87

3) Which year's sales statistics are more consistent?

A. Last summer, because variance of sales for last summer is smaller than this year's sales

B. Current summer, because standard deviation of sales is greater than last year's sales

C. Current summer, because coefficient of variation for current summer is greater than last year

D. Last summer, because coefficient of variation for this summer is greater than last summer

### Recently Asked Questions

- Determine the best fit equation, y=mx+b, and the coefficient of correlation for the following data set. What is the predicted death rate for the age of 35?

- State Ho & Ha. List F, which is F(test), p-value and F(crit) from the table generated as output by theanalysis. Perform an ANOVA-Single Factor analysis on the

- State Ho and Ha. List computed values for E11, E12, E21, and E22. The list the values that you have computed for x 2 (test)and2 (crit). Finally, state the