10.1

9.

The test is right tailed. The parameter being tested is m

10.

The test is left tailed. The parameter being tested is p.

11.

Two tailed. o is being tested.

12.

Right tailed. P is being tested.

13.

Left tailed. M is being tested.

14.

Two tailed. o is being tested.

15.

Ho: p=0.399

H1: p>0.399

Type 1: It would be falsely reported that the proportion of students enrolled is not 0.399. Type 2: It would be falsely reported that the proportion is 0.399 when it is higher.

17.

Ho: m=245,700

H1: m<245,700

Type 1: It would be falsely reported that the mean housing price is not $245,700. Type 2: It would be falsely reported that the housing price mean is $245,700 when it is lower.

19.

Ho: o=0.7

H1: o<0.7

Type 1: It would be falsely reported that the SD pressure is not 0.7psi type 2: It would be falsely reported that the SD pressure is 0.7 when it is lower.

21.

Ho: m=$48.79

H1: m=/=$48.79

Type 1: It would be falsely reported that the mean revenue is not $48.79 Type 2: It would be falsely reported that the mean revenue is $48.79 when it is different.

10.2

7.

  1. 2.31
  2. p=0.0104
  3. Reject H0

9.

  1. -0.74
  2. 0.2296
  3. Do not reject H0

11.

  1. -1.49
  2. 0.1362
  3. Do not reject H0

13.

The p value means that there is a 27.43% probability of obtaining the expected result. This is significant enough to not reject the null hypothesis of p=0.5

15. Note this is slightly modified version of the book problem Just answer a) b) and c) fromt the skeleton.

  1. 0.472

Ho: p=0.5

H1: p=/=0.5

  1. z=-1.45 p=0.0735 The p value is significant enough to not reject the H0.

17.

  1. p=0.2578

  2. Do not reject the null hypothesis

19.

  1. p=0.0036

  2. Reject H0