Math  /  Data & Statistics

QuestionAccording to an online source, the mean time spent on smartphones daily by adults in a country is 2.55 hours. Assume that this is correct and assume the standard deviation is 1.2 hours. Complete parts (a) and (b) below. a. Suppose 150 adults in the country are randomly surveyed and asked how long they spend on their smartphones daily. The mean of the sample is recorded. Then we repeat this process, taking 1000 surveys of 150 adults in the country. What will be the shape of the distribution of these sample means?
The distribution will be \square because the values will be \square

Studdy Solution
The distribution will be **normal** because the Central Limit Theorem applies since n=150>30n=150 > 30.
The values will be the **sample means** of smartphone usage from each survey.

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