A sample of 30 is selected from a population with an unknown mean. The one-sample t estimation equation is used to compute the 90% confidence interval around µ. Which of the values below should be used for t in this equation?  µ = 40 ± ( t )( 4 )

A 99% confidence interval for µ is computed from sample data and the interval estimate ranges from 63 to 77. This indicates that:

What type of graph would be acceptable to use for a discrete variable and why?

If z obtained exceeds the z critical, what decision do you make?

A sample of 30 is selected from a population with an unknown mean. The one-sample t estimation equation is used to compute the 90% confidence interval around µ. Which of the values below should be used for t in this equation?  µ = 40 ± ( t )( 4 )

Which of the following accurately describes the observed frequencies for a chi-square test?

In a between-subjects ANOVA with three treatment conditions, all three treatments have the same mean (5.50), M1 = M2 = M3.  For these data, what is SSBetween Groups?

A repeated-measures research study uses 8 subjects.  If the within-treatment df for the ANOVA is 21, what is the value for the error df?

A sample of 20 is selected from a population with an unknown mean. The one-sample t estimation equation is used to compute the 99% confidence interval around µ. Which of the values below should be used for t in this equation?  µ = 40 ± ( t )( 4 )

Imagine that you are going to compute a 95% confidence interval. Which combination of sample characteristics would produce the narrowest interval?