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1. what is the probability that the sample of 16 scores has a mean less than 15 if the mean of all the scores is 13 and standard deviation of population is 5?
a. .4918
b. .9772
c. .9452
d. .4452
2. what is. the probability that a sample of 5 scores will have a mean greater than 95?
a. .3686
b. .8686
c. .1314
d. .0934
3. what is the probability that a sample of 9 scores will have a mean greater than 107?
a. .2420
b. .2119
c. .0179
d. .4821
4. find the probability that a single score drawn at random will be less than 107?
a. .7580
b. .7881
c. .2580
d. .2881
5. find the z value that corresponds to a sample of 4 scores with a mean of 95.
a. -1
b. 1
c. -2
d. 2​