Evaluate the standard error for the sample

Reference no: EM137741

1. For small samples, t intervals are ___________ z intervals based on the same data set.

A. narrower than
B. the same as
C. wider than

2. I took a sample of the grade point averages for students in my class. For 25 students, the standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was

A. 0.578.
B. 0.026.
C. 0.13.

3. I took a sample of the grade point averages for students in my class. For 25 students, the standard deviation of grade points was 0.65 and the mean was 2.89. A 95% confidence interval for the average grade point average for all students in my class is

A. (2.64, 3.14)
B. (2.62, 3.16)
C. (2.53, 3.25)

Reference no: EM137741

Questions Cloud

The p-value of a test : To determine if this is evidence that students perform worse under uncomfortable conditions, The P-value of a test

Simple random samples from the appropriate populations : Based on surveys conducted in 1989 and 1999, a researcher compared the proportion of high school age females interested in a career in science in 1989 with the proportion in 1999. He concluded that the proportions were not significantly different ..

Find the standard error : The conservative degrees of freedom for the t distribution are and The standard error, conservative degrees of freedom

Difference between the t and z distributions : The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions

Evaluate the standard error for the sample : The standard deviation of grade points was 0.65 and the mean was 2.89. The standard error for the sample was

Evaluate the confidence interval : The 50 members of the placebo group had blood pressure lowered by an average of 15 points with standard deviation 8 points. To analyze this information we will use a, When testing whether or not the increases in spending are different, the test is ..

Water displacement method : Each egg was also measured for volume using a water displacement method. We wanted to know if the two methods agreed or not

Evaluate the standard deviation : Evaluate the standard deviation - use the conservative value for the degrees of freedom, Assume the two groups are independent and the data are approximately Normal. Let µ 1 and µ 2 represent the mean heart rates we would observe for the entire po..

Standard deviations for first- and second-time : Standard deviations for first- and second-time and confidence interval

User Account

All Pages