Current Attempt in Progress

According to aHuman Resourcesreport, a worker in the industrial countries spends on average 419 minutes a day on the job. Suppose the standard deviation of time spent on the job is30minutes.

a.If the distribution of time spent on the job is approximately bell shaped, between what two times would 68% of the figures be?

enter the lower limit for the interval where 68% of the values would fall

to

enter the upper limit for the interval where 68% of the values would fall

b.If the distribution of time spent on the job is approximately bell shaped, between what two times would 95% of the figures be?

enter the lower limit for the interval where 95% of the values would fall

to

enter the upper limit for the interval where 95% of the values would fall

c.If the distribution of time spent on the job is approximately bell shaped, between what two times would 99.7% of the figures be?

enter the lower limit for the interval where 99.7% of the values would fall

to

enter the upper limit for the interval where 99.7% of the values would fall

d.If the shape of the distribution of times is unknown, approximately what percentage of the times would be between357and481minutes?

enter percentages rounded to 1 decimal place

%(Round the intermediate values to 3 decimal places. Round your answer to 1 decimal place.)

e.Suppose a worker spent 400 minutes on the job. What would that worker'szscore be, and what would it tell the researcher?

zscore =

enter the zscore rounded to 3 decimal places

(Round your answer to 3 decimal places.)

This worker is in the lower half of workers but within

select the distance from the mean

three

two

one

standard deviation of the mean.