160k views
1 vote
The mean percentage of a population of people eating out at least once a week is 57% with a standard deviation of 3.50%. Assume that a sample size of 40 people was surveyed from the population a significant number of times. In which interval will 68% of the sample means occur?

User Zaggo
by
7.9k points

2 Answers

2 votes

Answer:

See image

Explanation:

Plato

The mean percentage of a population of people eating out at least once a week is 57% with-example-1
User Extramaster
by
8.0k points
5 votes
Since 68% of the sample ranges from the plus minus first standard deviation from the mean, then interval wherein it will occur will be between 53.5% to 60.5%. I got this answer through adding and subtracting one standard deviation (3.5) from the mean (which is 57). 
User Ravi Sankar Rao
by
8.2k points
Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.