9
Right tailed, mu.
10
Left tailed, p
11
Two tailed, sigma
12
Right tailed, p
13
Left tailed, mu
14
Two tailed, sigma
15
Ho: p = .105
H1: p > .105
Type 1 error: Determining the true proportion p is greater then .105 when it is not.
Type 1 error: Determining the true proportion p is not greater then .105 when it is.
17
Ho: mu=$218,600
H1: mu<$218,600
Type 1 error: The real estate broker said that the mean price of an existing single family home has decreased, when it really hasn’t
Type 2 error: The real estate broker did not say that the mean price of an existing single family home decreased, when it really has
19
Ho: sigma=.7
H1: sigma<.7
Type 1 error: The quality control manager rejects that the variability in the pressure required is .7 psi, when it actually is .7 psi.
Type 2 error: The quality control manager says that the variability in the pressure required is .7, when it actually is less than .7
21
Ho: mu= $47.47
H1: mu does not = $47.47
Type 1 error: The researcher says that the mean cell phone bill is not $47.47, but it actually is
Type 2 error: The researcher says the mean cell phone bill is $47.47, when it actually is not
7
np(1-p) is greater then or equal to 10.
The Pvalue = .0104
Reject the Null Hypothesis.
9
np(1-p) is greater than or equal to 10
The Pvalue = .2296
Do not reject the Null Hypothesis
11
np(1-p) is greater then or equal to 10.
The Pvalue = .1362
Do not reject the Null Hypothesis.
13
27/100 samples will give a sample proportion as high/higher than the one obtained if the population proportuon truly is .05. Do not reject the null gypothesis because this probability isn’t small
15
The Pvalue = .2578
There isn’t sufficient evidence to conclude that more than 1.9% of Lipitor users experience flu-like symptoms
17
The Pvalue = .1379
There isn’t sufficient evidence to conclude that a majority of adults in the US believe they won’t have enough money in retirement
19
The Pvalue = .0047
There is sufficient evidence to support that the proportion is greater than .56