A normally distributed population of scores has a mean of 82 and a standard deviation of 11. All possible samples of 14 scores are drawn, with replacement, and the mean for each sample is calculated. The shape of the resulting sampling distribution of mean is
a. positively skewed.
b. normal.
c. more leptokurtic than the population.
d. certainly not normal as the sample size was too small.
e. One cannot tell without more information.
Ans: b
You might also like to view...
Special instruments and techniques are used to conduct daily health checks
a. True b. False Indicate whether the statement is true or false
Children's age and immature development place them at high risk for communicable illness
a. True b. False Indicate whether the statement is true or false
Facilitating referrals to school and community-based programs is a job duty of a transition specialist or coordinator
Indicate whether the statement is true or false.
Pairs of novice weight lifters from Clem's Gym have been matched for height, weight, and experience. One of each pair is assigned to one group and the other to a second group. Both groups work out for an hour and a half every second day, using the same routine. However, Group #2 receives special instructions on effective bench pressing strategies. Two months later, both groups are tested for improvement in the number of kilograms they are able to bench press. What test should be used to test for the difference in improvement between the two groups?
a. t-test for the difference between two independent means b. t-test for the difference between two dependent means c. z-test for the difference between two independent means d. t-test for a single mean e. z-test for proportion