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 2 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: Determining that the population mean price has decreased to less than 218,600 dollars when it really has not.
Type 2 error: Determining that the population mean price has not decreased when it really has decreased.
19
Ho: sigma = 0.7 H1: sigma < 0.7
Type 1 error: Claiming that the variability in pressure has decreased lower than 0.7 when it really has not.
Type 2 error: Claiming the pressure variability has not decreased below 0.7 when it really has decreased.
21
Ho: mu = 47.47 H1: mu does not = 47.47
Type 1 error: Claiming that the average monthly payment is different than 47.47 when it really is not different.
Type 2 error: Claiming that the average monthly payment is the same today when it is actually different.
7
np(1-9) is greater then or equal to 10.
The Pvalue = .0104
Reject the Null Hypothesis.
9
150(.55)(.45) = 37.125 is greater than 10
The Pvalue = 0.2296
Do not reject the null hypothesis
11
500(.9)(.1) = 45 is greater than 10
The Pvalue = 0.1362
Do not reject the null hypothesis
13
The Pvalue = 0.2743
We cannot reject the null hypothesis because the Pvalue is greater than alpha. Because you can’t reject the null hypothesis, you cannot say whether P > 0.5.
15
The Pvalue = 0.2578
We cannot reject the null hypothesis because the Pvalue is greater than alpha. So there is no evidence that more than 1.9% of users experience symptoms.
17
The Pvalue = 0.1379
Since the Pvalue is greater than alpha, we cannot reject the null hypothesis. So there is not sufficient eveidence to say that the majority of adults in the US believe they will not have enough money in retirement.
19
The Pvalue = 0.0047
You can reject the null hypothesis because the Pvalue is less than alpha. So there is sufficient evidence to say that the percentage of adults who think basic math skills are important for jobs has increased above 56%.