9
Right tailed, m.
10
left-tailed, p
11
Two-tailed, s
12
Right-tailed, p
13
Left-tailed, μ
14
Two-tailed, o
15
Ho: p = .105
H1: p > .105
The sample evidene led the researcher to believe that the proportion of births to teenage mothers increased, when the proporation wasn’t increased.
The sample evidence did not lead the researcher to believe the proporation of births to teenage mothers increased, when the proportion increased.
17
Ho: m = $218,600
H1 : m < $218,600
The sample evidence led the real estate broker to conclude that the mean price of an existing single-family home decreased, when the mean price was not decreased.
The sample evidence did not lead the real estate broker to conclude that the mean price of an existing single-family home decreased, when the mean price decreased.
19
H0 o = 0.7 psi, H1 : o < 0.7 psi
The quality control manager rejectes the hypothesis that the variability is 0.7 psi. when the true variability is 0.7 psi
21
H0 : o = $47.47, H1 m is not equal to $47.47
The sample evidence led the researcher to believe the mean monthly cell phone bill is not $47.47, when the mean is $47.47
The sample evidnce did not lead the researcher to believe that the mean monthly cell phone is not $47.47, when the mean bill is not $47.47
7
np(1-9) is greater than 10.
The Pvalue = .0104
Reject the Null Hypothesis.
9
np(1 - p) is 37.1, which is greater than 10.
The Pvalue = 0.2296
Do not reject the Null Hypothesis.
11
np(1 - p) is 45, which is greater than 10.
The Pvalue = 0.1362
Do not reject the Null Hypothesis.
13
Do not reject the Null Hypothesis becuase the probability is not small. There is not enough evidence to conclude that the dart-picking strategy results in a majority of winners.
15
np(1 - p) is 16.1, which is greater than 10.
The Pvalue = 0.2578
Do not reject the Null Hypothesis.
17
The Pvalue = 0.1379
Do not reject the Null Hypothesis.
19
The Pvalue = 0.0047
Reject the Null Hypothesis.