21. About what percent of the company makes less than $42,000? a. 978 b. 055 C. 033 d. 023

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please use the information on both pages to answer number 21

17. People who make less than
and more than
are considered unusual?
a. $42,000; $58,000
b. $60,000; $40,000
c. $70,000; $30,000
d. $50,000; S70,000
c. $45,000; $55,000
18. Use a z-table to determine the percentage of people that make less than $50,000.
a. 51.83%
b. 48.71%
c. 56.98%
d. 50.00%
e. 53.94%
19. If you were to pick somebody from the company at random, what is the probability that this person
makes between $41,000 and $45,000? You may use any method you wish to calculate this.
a. 17
b. 12
C. 07
d. .09
e. 08
20. About what percent of the company makes more than $55,000?
a. About 10%
b. About 16%
c. About 22%
d. About 30%
e. About 84%
21. About what percent of the company makes less than $42,000?
a. 978
b. 055
c. .033
d. .023
e. 385
Transcribed Image Text:17. People who make less than and more than are considered unusual? a. $42,000; $58,000 b. $60,000; $40,000 c. $70,000; $30,000 d. $50,000; S70,000 c. $45,000; $55,000 18. Use a z-table to determine the percentage of people that make less than $50,000. a. 51.83% b. 48.71% c. 56.98% d. 50.00% e. 53.94% 19. If you were to pick somebody from the company at random, what is the probability that this person makes between $41,000 and $45,000? You may use any method you wish to calculate this. a. 17 b. 12 C. 07 d. .09 e. 08 20. About what percent of the company makes more than $55,000? a. About 10% b. About 16% c. About 22% d. About 30% e. About 84% 21. About what percent of the company makes less than $42,000? a. 978 b. 055 c. .033 d. .023 e. 385
The standard normal distribution is a continuous distribution with a mean of 0 and a standard deviation of 1.
The following is true:
About 68% of all outcomes lie within 1 St.Dev.
About 95% of all outocomes lie within 2 St.Devs.
About 99.7% of all outcomes lie within 3 St. Devs.
The probability/percentage/percentile for a normal distribution is the area under the curve. You will ALWAYS
BE CALCULATING OVER AN INTERVAL.
Values outside of 2 St.Devs. are considered "unusual values."
Recall that -H _ value – mean
SI.Dev
salaries of employees in a large company are normally distributed with a mean of $50,000 and a
standard deviation of $4,000. What is the z-value for a person who makes $43,175?
14.
a. -1.37
b. -.037
e. -1.71
d. -1.25
c. 62
15. Use a z-table to determine the percentage of employees at this company that make less than $43,175.
a. 0461
b. 0422
c. .0440
d. 0436
e. 0491
16. Use the z-table to determine the percentage of employees that make MORE than $43,175. If you draw a
blank, read the instructions at the bottom of your z-table.
a. 9547
b. 9564
c. 9560
d. 9525
e. 9566
Transcribed Image Text:The standard normal distribution is a continuous distribution with a mean of 0 and a standard deviation of 1. The following is true: About 68% of all outcomes lie within 1 St.Dev. About 95% of all outocomes lie within 2 St.Devs. About 99.7% of all outcomes lie within 3 St. Devs. The probability/percentage/percentile for a normal distribution is the area under the curve. You will ALWAYS BE CALCULATING OVER AN INTERVAL. Values outside of 2 St.Devs. are considered "unusual values." Recall that -H _ value – mean SI.Dev salaries of employees in a large company are normally distributed with a mean of $50,000 and a standard deviation of $4,000. What is the z-value for a person who makes $43,175? 14. a. -1.37 b. -.037 e. -1.71 d. -1.25 c. 62 15. Use a z-table to determine the percentage of employees at this company that make less than $43,175. a. 0461 b. 0422 c. .0440 d. 0436 e. 0491 16. Use the z-table to determine the percentage of employees that make MORE than $43,175. If you draw a blank, read the instructions at the bottom of your z-table. a. 9547 b. 9564 c. 9560 d. 9525 e. 9566
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