In: Statistics and Probability
How much customers buy is a direct result of how much time they spend in the store. A study of average shopping times in a large national houseware store gave the following information (Source: Why We Buy: The Science of Shopping by P. Underhill).
Women with female companion: 8.3 min.
Women with male companion: 4.5 min.
Suppose you want to set up a statistical test to challenge the claim that a woman with a female friend spends an average of 8.3 minutes shopping in such a store.
(a) What would you use for the null and alternate hypotheses if you believe the average shopping time is less than 8.3 minutes?
Ho: μ < 8.3; H1: μ = 8.3Ho: μ = 8.3; H1: μ ≠ 8.3 Ho: μ = 8.3; H1: μ < 8.3Ho: μ = 8.3; H1: μ > 8.3
Is this a right-tailed, left-tailed, or two-tailed test?
two-tailedleft-tailed right-tailed
(b) What would you use for the null and alternate hypotheses if you
believe the average shopping time is different from 8.3
minutes?
Ho: μ = 8.3; H1: μ < 8.3Ho: μ ≠ 8.3; H1: μ = 8.3 Ho: μ = 8.3; H1: μ > 8.3Ho: μ = 8.3; H1: μ ≠ 8.3
Is this a right-tailed, left-tailed, or two-tailed test?
right-tailedleft-tailed two-tailed
Stores that sell mainly to women should figure out a way to engage the interest of men! Perhaps comfortable seats and a big TV with sports programs. Suppose such an entertainment center was installed and you now wish to challenge the claim that a woman with a male friend spends only 4.5 minutes shopping in a houseware store.
(c) What would you use for the null and alternate hypotheses if you believe the average shopping time is more than 4.5 minutes?
Ho: μ = 4.5; H1: μ < 4.5Ho: μ = 4.5; H1: μ > 4.5 Ho: μ > 4.5; H1: μ = 4.5Ho: μ = 4.5; H1: μ ≠ 4.5
Is this a right-tailed, left-tailed, or two-tailed test?
two-tailedleft-tailed right-tailed
(d) What would you use for the null and alternate hypotheses if you
believe the average shopping time is different from 4.5
minutes?
Ho: μ = 4.5; H1: μ < 4.5Ho: μ ≠ 4.5; H1: μ = 4.5 Ho: μ = 4.5; H1: μ > 4.5Ho: μ = 4.5; H1: μ ≠ 4.5
Is this a right-tailed, left-tailed, or two-tailed test?
left-tailedright-tailed two-tailed
A)
Claim is that u is less than 8.3
So, null and alternate hypothesis are
Ho : u = 8.3
H1 : u < 8.3
It is left tailed test
B)
Claim is that mean is different from 8.3
Ho : u = 8.3
H1 not equal to 8.3
It is two tailed test
C)
Claim.is u > 4.5
Ho : u = 4.5
H1 : u > 4.5
It is right tailed test
D)
Ho : u = 4.5
H1 : u not equal to 4.5
It is two tailed test