10.2

7.

  1. 2.31.
  2. 1.645.
  3. reject the null hypothesis

9.

  1. -.74
  2. -1.28
  3. fail to reject the null hypothesis

11.

  1. -1.49
  2. 2-sided: -1.96 and 1.96
  3. fail to reject the null hypothesis

13.

this P value suggests that it would happen around 27 or 28 times for every 100 times,if null is true, which is not statistically significant enough to reject the null hyporthesis

15.

  1. p hat = .472

Ho: p = .5

H1: p < .5

  1. np(1-p)= 169.5 which is >= than 10

  2. Skip

  3. .0735

  4. we would expect this to happen 7 or 8 times of 100 if null is true

  5. we fail to reject the null because .0735 is greater than our level of significance of .05.

17.

  1. Type value of (test statisic (.65) and critical value (2.33))

  2. fail to reject the null because the test statistic falls below the critical value

19.

  1. Type value of (test statisic (2.69) and critical value(1.645))

  2. we reject the null hypothesis becuase 2.69 > our critical value 1.645