Practice Test 3 Answers

1) H_o: m = 69 (claim) 7) H_o: (claim)

H_a: m 69 H_a:

Two-tail two-tail

Ztest 2-PropZTest

Fail to reject H_o

Data supports the claim Reject H_o

that the mean is 69. Data does not support the claim

2) ZInterval that the 2 proportions are equal.

m 8) 2-PropZInt

3) H_o: m = 2.0 0.02 0.38

H_a: m > 2.0 (claim)

One-tail

23

TTest

Reject H_o

Data supports the claim

that the mean GPA is

greater than 2.0

4) TInterval

m

5) H_o: m₁ = m₂ (claim)

H_a: m₁ m₂

two-tail

2-SampTTest

Fail to reject H_o

Data supports the claim

that the populations have

the same mean.

6) 2-SampZInt

0.1 m_d 9.9