Author Question: Which one of the following is not true about hypothesis tests? a. Hypothesis tests are only valid ... (Read 174 times)

LaDunn · **on:** Jul 24, 2018

Which one of the following is not true about hypothesis tests?
a. Hypothesis tests are only valid when the sample is representative of the population for the question of interest.
b. Hypotheses are statements about the population represented by the samples.
c. Hypotheses are statements about the sample (or samples) from the population.
d. Conclusions are statements about the population represented by the samples.

Question 2

In the population of female students, motivation scores follow a normal distribution with an average of 29 and a standard deviation of 4.3 . A random sample of female students is to be taken. They are all asked to answer the motivation questionnaire so that their motivation scores can be determined. If the sample size is 20, what is the probability that the mean score of the female students in the sample will fall below 27?
a. < 0.0001
b. 0.0005
c. 0.0188
d. 0.3192