Statistics Hypothesis

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level. What is the null hypothesis?

• The average number of books read by grade 8 students is 10.

• The average number of books read by grade 8 students is 12.

• The average number of books read by grade 8 students is greater than 10.

• The average number of books read by grade 8 students is greater than 12.

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What is the parameter?

• population mean

• population variance

• sample mean

• sample standard deviation

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

Describe the parameter.

• average number of books read by grade 8 students in a month

• average number of books read by grade 8 students in a month is 10

• average number of books read by grade 8 students in a month is 12

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What is the level of significance?

• 0.1

• 0.05

• 0.5

• 0.01

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What is the null hypothesis in symbols?

• 
• 
• 
• 

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What is the alternative hypothesis?

• The average number of books read by grade 8 students is not 10.

• The average number of books read by grade 8 students is not equal to 12.

• The average number of books read by grade 8 students is greater than 10.

• The average number of books read by grade 8 students is greater than 12.

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What is the alternative hypothesis in symbols?

• 
• 
• 
• 

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What type of test should be used?

• one-tailed, right-tailed test

• one-tailed, left-tailed test

• two-tailed test

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What is the appropriate test statistic to use?

• r

• t

• z

• annova

A librarian of a school claims that all their grade 8 students read an average of 10 storybooks a month with a standard deviation of 2 books. A random sample of 35 grade 8 students read an average of 12 books a month and a standard deviation of 1 book. Test the claim at 95% confidence level.

What is the value of the test statistic?

• 0.33

• 5.92

• -5.92

• -3.98