# Question

In the population of typical college students, µ = 75 on a statistics final exam (σx = 6.4) .For 25 students who studied statistics using a new technique,

X = 72.1. Using two tails of the sampling distribution and the .05 criterion:

(a) What is the critical value?

(b) Is this sample in the region of rejection?

How do you know?

(c) Should we conclude that the sample represents the population of typical students?

(d) Why?

X = 72.1. Using two tails of the sampling distribution and the .05 criterion:

(a) What is the critical value?

(b) Is this sample in the region of rejection?

How do you know?

(c) Should we conclude that the sample represents the population of typical students?

(d) Why?

## Answer to relevant Questions

In a population, µ = 100 and σx = 25. A sample (N = 150) has X = 102. Using two tails of the sampling distribution and the .05 criterion: (a) What is the critical value? (b) Is this sample in the region of rejection? How ...On a standard test of motor coordination, a sports psychologist found that the population of average bowlers had a mean score of 24, with a standard deviation of 6. She tested a random sample of 30 bowlers at Fred’s ...The mean of a population of raw scores is 18 (σx = 12). (a) Using the z-table, what is the relative frequency of sample means above 24 when N = 30? (b) What is the probability of randomly selecting a sample of 30 ...For each study in question 11, indicate whether a one- or a two-tailed test should be used and state the H0 and Ha. Assume that µ = 50 when the amount of the independent variable is zero. We ask if the attitudes toward fuel costs of 100 owners of hybrid electric cars (X = 76) are different from those on a national survey of owners of non-hybrid cars (p = 65, σX = 24). Higher scores indicate a more positive ...Post your question

0