10.1

9.

Right tail, mean parameter is being tested 10.

Left tailed, population proportion parameter is being tested

11.

2 tailed, population standard deviation parameter is being tested

12.

Type answer here.Right tailed, population proportion parameter is being tested 13.

Left tailed, mean parameter is being tested

14.

Type answer here. 2 tailed, standard deviation population parameter is being tested

15.

Ho: type answer here Ho: p =0.399

H1: type answer here Ha p > 0.399

Type 1 error: Rejecting that the proportion of students in 2 year public institutions who earn their bachelor’s degree in 2 years is 0.399, when this claim is actually true.

Type 2 error: Accepting that the proportion of students in 2 year public institutions who earn their bachelor’s degree in 2 years is 0.399, when this claim is actually false.

17.

Ho: type answer here mean=245,700

H1: type answer here Mean <245700

Type 1 error: Rejecting that the existing mean price of a single family home in 2013 is $245700, when this claim is actually true. Type 2 error: Accepting that the existing mean price of a single family home in 2013 is $245700, when this claim is actually false. 19.

Ho: type answer here sigma = 0.7

H1: type answer here Sigma < 0.7 Type 1 error: Rejecting that the standard deviation required to open a valve is 0.7 psi, when this claim is actually true.

Type 2 error: Accepting that the standard deviation required to open a valve is 0.7 psi, when this claim is actually false.

21.

Ho: type answer here mean = 48.79

H1: type answer here Mean is not equal to 48.79

Rejecting that the mean monthly revenue for cell phones is $48.79 in 2014, when this claim is actually true. Accepting that the mean monthly revenue for cell phones is $48.79 in 2014, when this claim is actually false.

10.2

7.

  1. Type value of test statisic here. Classical: zO= 2.31 > z0.05 = 1.645,

  2. Type pvalue here. P value: p=0.0104 <0.05

  3. Type decision here. Reject Ho

9. a) Type value of test statisic here. Classical: zO= -.74 > -z0.10 = -1.28

  1. Type pvalue here. P value=0.2296 > 0.10

  2. Type decision here. fail to reject Ho

11 a) Type value of test statisic here. zO=-1.49 is between -z0.025 =-1.96, and z 0.025 = 1.96 b) Type pvalue here. p value = 0.1362 > 0.05 c) Type decision here. fail to reject Ho

13.

Type answer here 27 in 100 samples will give a sample proportion as high as the one obtained if the true proprtion is 0.5. So we fail to reject Ho.

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

  1. Type answer here. p hat=0.472

Ho: type answer here p =0.5

H1: type answer here With 100 different sampls of size 678, we expect 7 samples to result in a sample proportion of correct predictions of 0.472 or less.

  1. Type value of your test statistics and decision here. The p value is greater than the level of significance, so we do not reject the null hypothesis.

17.

  1. Type value of (test statisic and critical value) or pvalue here. (you can use either method.) zO = 0.65 <z0.01 = 2.33, do not reject the null hypothesis

  2. Type answer here. p value = 0.2578 > 0.01, fail to reject Ho

19.

  1. Type value of (test statisic and critical value) or pvalue here. (you can use either method.) zo = 2.69, >z0.05 = 1.645, reject Ho

  2. Type answer here. P value =0.0036 < 0.05, reject Ho.