The distribution of the number of hours people spend at work per day is unimodal and symmetric with a mean of 8 hours and a standard deviation of 0.5 hours. 95% of all people work between and hours per day? a.7 and 9 hours (t/f)

95% of all people work between 7 hours and 9 hours per day and It is true.

Step-by-step explanation:

Since we have given that

Mean = 8 hours

Standard deviation = 0.5 hours

According to Empirical Rule,

at 95% confidence, it lies within 2 standard deviations  from the mean

so, lower value is given by

upper value is given by

Hence, 95% of all people work between 7 hours and 9 hours per day.

Therefore , it is true.

sine

step-by-step explanation: