Week 2 Statisc Research Math

Gayle Britton- Week 2 Individual E= Text August 13, 2011

Question 9.54

Ho: mean is < or = H1: mean > 10

Hypothesis Test: Mean vs. Hypothesized Value

10.0000 hypothesized value

14.4400 mean fax

4.4500 std. dev.

0.7522 std. error

35 n

5.90 z

1.79E-09 p-value (one-tailed, upper)

12.5025 confidence interval 99.% lower

16.3775 confidence interval 99.% upper

1.9375 margin of error

The true mean greater than 10 yes therefore we do not accept Ho. The right -tail p-vaule is 1.79E-09.

Question 9.62

Ho: Prop < = .95 H1: Prop > .95

Hypothesis test for proportion vs hypothesized value

Observed Hypothesized

0.97 0.95 p (as decimal)

485/500 475/500 p (as fraction)

485. 475. X

500 500 n

0.0097 std. error

2.05 z

.0201 p-value (one-tailed, upper)

0.9529 confidence interval 97.5% lower

0.9871 confidence interval 97.5% upper

0.0171 margin of error

The P value (.0201) less than alpa (.025) Therefore we do not accept Ho

Hypothesis Test: Mean vs. Hypothesized Value

Questions 9.64

250.0000 hypothesized value

275.6600 mean med

78.1100 std. dev.

15.6220 std. error

25 n

24 df

1.643 t

.0568 p-value (one-tailed, upper)

Ho: mean is then or = 250 H1: mean is > 250

Therefore since P < alpa do not accept null hypothesis. However, the decision is close since the P vaule and alpa are very close.

Question 9.56...