A meteorologist wants to determine if it was colder this past October than it wa
ID: 3133148 • Letter: A
Question
A meteorologist wants to determine if it was colder this past October than it was in October of the previous year, on average, using a 10% significance level. From each October month, he randomly selects 8 different days from each year and records the temperature. Let Group 1 = temperatures from October this past year and Group 2 = tempteratures from October the previous year.
a)
Which of the following is the appropriate symbol to complete set of hypotheses?
H0: 1 = 2 versus Ha: 1 ? 2
a) > (greater than or one-sided to the right)
b)< (less than or one-sided to the left)
c) not equal to (two-sided)
b) Suppose the meteorologist conducts the appropriate test and obtains a p-value of 0.076 and thus decides to reject the null hypothesis. What type of error could he have made?
a) Type 1 error
b) Type 2 error
c) Since the decision has been made, no error is possible
Explanation / Answer
1) b) < (less than or one-sided to the left) Answer
2) a) Type 1 error Answer