Costco Wholesale claims that Costco members prefer its Kirkland brand toilet paper over the leading national brand. To test this claim, Costco recorded the preferences of a random sample of customers which are summarized in the table below.
Preference Number of CustomersKirkland brand 38National brand 20No preference 5The mean for the sampling distribution for this hypothesis test is ________.A) 29.0
B) 32.0
C) 36.5
D) 38.0
Question 2
The ________ frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.
A) relative
B) expected
C) cumulative
D) observed