A company asked its employees how much time they spend reading and responding to email. The line plot displays the

employees' responses. How many total hours do the employees spend using email?

Amount of Time Spent Using Email

Number

of

Employees

3/4

3/8 1/2 5/8

Fraction of an Hour

3 is greater then both of those numbers

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d. 24+-0.114

step-by-step explanation:

the question requires us to calculate the approximate 95% confidence interval for the mean number of ounces of ketchup per bottle in the sample given the following statistics;

sample mean = 24

standard deviation, σ = 0.4

sample size , n = 49

the confidence interval for a population mean is calculated using the formula;

sample mean ± z-score*(σ/sqrt(n))

the z-score associated with a 95% confidence interval, from the standard normal tables, is;

1.96

substituting these values into the formula;

24 ± 1.96*(0.4/7)

= 24 ± 0.112

from the alternatives given, choice d is closest to the above expression;