9
Right tailed, mu.
10
Left tailed, p.
11
two tailed, sd.
12
right tailed, p.
13
left tailed, mu.
14
two tailed, mu.
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: u < 218,600
Type 1 error: It would be to say that the price has decreased even though it stays the same.
Type 2 error: It would be to say that the mean price remains the same even though it had, in fact, decreased.
19
Ho: sd = 0.7
H1: <0.7
Type 1 error: It would be to say that the sd pressure had decreased when in fact it remained the same.
Type 2 error: It would be to say that the sd pressure had not changed, even though it infact had decreased.
21
Ho: mu = 47.47
H1: not equal to 47.47
Type 1 error: It would be to say that the cell phone bill monthly mean is different even though it has not changed.
Type 2 error: It would be to say that the mean monthly cell phone bill has not changed even though it has.
7
np(1-9) is greater then or equal to 10.
The Pvalue = .0104
Reject the Null Hypothesis.
9
np(1-0.6) is 36 so it is greater than 10
The Pvalue = 0.55
Do not reject the null hypothesis.
11
np(1-0.4) is 120 which is greater than 10
The Pvalue = 0.1362
Do not reject the null hypothesis.
13
About 27 in 100 samples will give a sample proportion as high or higher than the one obtained if the population proportion really is 0.5. Because this probability is not small, we do not reject the null hypothesis. There is not sufficient evidence to conclude that the dart picking strategy resulted in a majority of winners.
15
The Pvalue = 0.2578
We do not reject the null hypothesis.
17
The Pvalue = 0.1379
Do not reject the null hypothesis.
19
The Pvalue = 0.047
Reject the null hypothesis.