Based on a survey of 32 randomly selected employees (anonymously, of course) the company has determined that the average amount of time spent texting over a one-month period is 173 minutes with a standard deviation of 66 minutes. what is the probability that the average amount of time spent using text messages is more than 199 minutes

0.0129

Step-by-step explanation:

Given : Sample size : n=32

The average amount of time spent texting over a one-month period is  :

Standard deviation :

We assume that the time spent texting over a one-month period is normally distributed.

z-score :

For x=  199

Now by using standard normal table, the probability that the average amount of time spent using text messages is more than 199 minutes will be :-

Hence, the required probability = 0.0129

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