8 statistics questions in total

Give 5 or 6 significant digits for (floating point) numerical answers.

Give 5 or 6 significant digits for (floating point) numerical answers. For most problems when entering numerical answers, you can if you wish enter elementary expressions such as 2∧3 instead of 8, e∧(ln(2)) instead of 2, etc.

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One-Mean-Hyp-Tech:

Give 5 or 6 significant digits for (floating point) numerical answers. For most problems when entering numerical answers, you can if you wish enter elementary expressions such as 2∧3 instead of 8, e∧(ln(2)) instead of 2, etc.

1

1. C

2. D (incorrect)

3. B

2

a) Test statistics 1.7139

b) P-value p= 0.04327

c) Two-tailed p-value = 0.08654

3

The test statistics 0.29792

The positive critical value 1.9600

The negative critical value -1.9600

B. There is no sufficient evidence to reject the claim that the mean is equal to 73.

4.

The test statistics 8.4000

The critical value 1.7531

B. There is sufficient evidence to support the claim that the mean grade point average is greater than 2.24.

5

The test statistics 0.29792

The positive critical value 1.9600

The negative critical value -1.9600

B. There is no sufficient evidence to reject the claim that the mean is equal to 73.

6.

a) The degree of freedom 9

b) The critical t value -1.8331

c) The test statistics -3.0768

The final conclusion is: We can reject the null hypothesis that *µ = 9.2*

7

a) The degree of freedom 7

b) The critical t value -1.8943

c) The test statistics 4.17308

The final conclusion is: There is no sufficient evidence to reject the null hypothesis that *µ = 3.7*

8

The sample mean is 65.02

The sample standard deviation is 1.7943

The test statistics is 4.79373

The critical value is 2.8214

The conclusion is: B there is sufficient evidence to support the claim that with the enriched feed, the mean weight is greater than 62.3