Statistics Quiz with Solutions (5 Questions)

by Electra Radioti
statistics quiz

statistics quiz

Statistics Quiz with Solutions (5 Questions)

Statistics Quiz with Solutions (5 Questions)

1 / 5

Simple linear regression model is a sum of _____ parts.

2 / 5

As the sample size of a random sample increases, the standard deviation of the sample mean _____.

3 / 5

A recently conducted survey indicates that teenagers spend a good amount of their time playing video games. Noel spends about 15 hours per week with a standard deviation of 3 hours. If the amount of time spent playing video games in any given week is normally distributed, then what is the probability that Noel plays video games between 15 and 18 hours a week? Use the empirical rule.

4 / 5

A researcher wants to determine the average income of the people of Omaha, Nebraska. He found that there are 385,600 employed people in the city. A group of 1,200 people were selected randomly to ascertain the income of each of those individuals. He finds that the average income of these 1,200 individuals is $42,827. Identify the sample in this context.

5 / 5

A professor records the difference between the marks scored by the students in the class test last week and those scored in the present week. The mean difference for 35 students was 12 with a standard deviation of 3. Construct a 99.9% confidence interval for the mean difference between the marks scored last week and marks scored this week by all the students.

Your score is

The average score is 60%

0%

Related Posts

Leave a Comment