In a hypothesis test the decision was made to not reject the null hypothesis. Which type of mistake could have been made?
a. Type 1.
b. Type 2.
c. Type 1 if it's a one-sided test and Type 2 if it's a two-sided test.
d. Type 2 if it's a one-sided test and Type 1 if it's a two-sided test.
Question 2
Items produced by a certain process are supposed to weigh 90 grams. However, the process is such that there is variability in the items produced and they do not all weigh exactly 90 grams. The distribution of weights is normal with a mean of 89.8 grams and a standard deviation of 1.1 gram. Suppose we have a random sample of 2 of these items. What is the probability that both these items weigh more than 91 grams?
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