9
Right tailed, mu.
10
Left Tailed, parameter
11
Two tailed, sigma
12
Right tailed, parameter
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 I error- The sample evidence made the broker conclude that the mean price of an existing single family has decreased, when the mean price has not decreased.
Type II error- The sample evidence did not make the broker conclude that the mean price of an existing single family home has decreased, when the mean price did decreased. 19 HO: sigma= 0,7 psi; H1:sigma< 0,7 psi
Type I error- The quality control manager reject the hypothesis that the variability required is 0,7 psi, when the real variability is 0,7 psi.
Type II error- The quality control manager fails to reject that the variability required is 0,7 psi, when the variability is less than 0,7 psi.
21
HO: mu= $47,47; H1:mu#( different)$47,47
Type I error- Made the researcher believe that the mean monthly cell phone bill is different than $47,47, when the mean is $47,47.
Type II error- Did not made the researcher believe that the mean monthly cell phone bill is different from $47,47 when the mean is different from $47,47
7
np(1-9) is greater then or equal to 10.
The Pvalue = .0104
Reject the Null Hypothesis.
9
npo(1-po)=37.1 >10
The Pvalue = 0.2296
do not reject the null hypothesis
11
npo(1-npo)=45>10.
The Pvalue = 0.1362
do not reject the null hypothesis.
13
Around 27 in 100 samples will give a sample proportion high or higher than the one obtained if the population proportion is 0.5. We do not reject the null hyphothesis becasuse the probability is not small. There is no sufficient evidency.
15
The Pvalue = 0.2578
do not reject the null hyphotesis. There is not enough evidence to conclude that 1.9% of Lipitor users experience flulike symptons as side effects.
17
The Pvalue = 0.1379
Do not reject the null hypothesis. There is not enough evidence to conclude that the majority of adults believe they will not have enough retirement money.
19
The Pvalue = 0.0047
Reject the null hyphotesis. There is enought evidence to conclude that the proportion of employed adults who feel basic math skills are critical or very important to their jobs is >0.56