Determining the z value-positive or negative

Reference no: EM1315985

Eric has computed that it takes an average (mean) of 17 minutes with a standard deviation of 3 minutes to drive from home, park the car, and walk to his job. One day it took Eric 21 minutes to get to work. You would use the formula for transforming a raw score in a sample into a z-score to determine how many standard deviations the raw score represents. Since his "score" is 21, you would subtract the mean of 17 from 21 and divide that result (4) by the standard deviation of 3. The z-score of 1.33 tells you that Eric's time to get to work is 1.33 standard deviations from the mean.

Is the z value positive or negative? Explain why it should be positive or negative.
Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative.
On a different day, it took Eric 17 minutes to get from home to work. What is the z value? Why should you expect this result even before you did the calculation?
Based on your study of z-scores, explain the three uses of z-scores. How might they each relate to Eric's trip between home and work?
What is the relationship between z-scores and the standard normal curve?

Reference no: EM1315985

Questions Cloud

Computethe following linear programming problem : Linear programming problems. Computethe following linear programming problem. Among which of the following points (X,Y) is feasible.

Solve the problem on time, work & distance : Solve the problem on time, work & distance

Imposition of tax and its impact on cost curves : How would each of the following affect the firm's marginal, average, and average variable cost curves?

Theory problems based on us regulations : Theory problems based on US regulations and distinguish between economies of scale and economies of scope

Determining the z value-positive or negative : Another day, it took Eric only 12 minutes to get to work. Using the same formula, determine the z value. Is it positive or negative? Explain why it should be positive or negative.

Calculation of gross interest cost and interest earned ratio : Calculation of gross interest cost and interest earned ratio and What would be the numeric adjustment(s), if any, to the Company's Consolidated Statement of Income and Consolidated Balance Sheet for minority interest in 2007?

Profit function-marginal cost and economies of scope : Consider a firm selling two different products at two different plants. The cost function for both plants is given by C (q 1 , q 2 ) = q 1 2 + αq 1 q 2 + q 2 2 .

Implications of company''s selection of an expected return : Briefly explain the implications of the Company's selection of an expected return on pension plan assets on the quality of the company's earnings

Change to the objective function or a raise in the value : Either no change to the Objective function or a raise in the value of the objective function depends on the constraint.

User Account

All Pages