QUESTION 5 The diameter of 35 inch diskettes is normally dis

QUESTION 5

The diameter of 3.5 inch diskettes is normally distributed. Periodically, quality control inspectors at Dallas Diskettes randomly select a sample of 16 diskettes. If the mean diameter of the diskettes is too large or too small the diskette punch is shut down for adjustment; otherwise, the punching process continues. The last sample showed a mean and standard deviation of 3.49 and 0.08 inches, respectively. Using ? = 0.05, the critical \"t\" values are __________ .

-2.120 and 2.120

-2.131 and 2.131

-1.753 and 1.753

-1.746 and 1.746

-2.567 and 2.567

2 points   

QUESTION 6

The diameter of 3.5 inch diskettes is normally distributed. Periodically, quality control inspectors at Dallas Diskettes randomly select a sample of 16 diskettes. If the mean diameter of the diskettes is too large or too small the diskette punch is shut down for adjustment; otherwise, the punching process continues. The null hypothesis is _________ .

n ? 16

n = 16

? = 3.5

? ? 3.5

? ? 3.5

3 points   

QUESTION 7

A company believes that it controls more than 30% of the total market share for one of its products. To prove this belief, a random sample of 144 purchasers of this product is contacted. It is found that 50 of the 144 purchased this company\'s brand of the product. If a researcher wants to conduct a statistical test for this problem, the alternative hypothesis would be _______ .

the population proportion is less than 0.30

the population proportion is greater than 0.30

the population proportion is not equal to 0.30

the population mean is less than 40

the population mean is greater than 40

2 points   

QUESTION 8

A company believes that it controls more than 30% of the total market share for one of its products. To prove this belief, a random sample of 144 purchasers of this product is contacted. It is found that 50 of the 144 purchased this company\'s brand of the product. If a researcher wants to conduct a statistical test for this problem, the observed z value would be _________ .

0.05

0.103

0.35

1.24

1.67

5 points   

QUESTION 9

Elwin Osbourne, CIO at GFS, Inc., suspects that at least 25% of e-mail messages sent by GFS employees are not business related. A random sample of 300 e-mail messages was selected to test this hypothesis at the 0.01 level of significance. Fifty-four of the messages were not business related. The null hypothesis is _______ .

? = 30

n = 300

p < 0.25

p ? 0.25

p = 0.25

2 points   

QUESTION 10

Elwin Osbourne, CIO at GFS, Inc., suspects that at least 25% of e-mail messages sent by GFS employees are not business related. A random sample of 300 e-mail messages was selected to test this hypothesis at the 0.01 level of significance. Fifty-four of the messages were not business related. The appropriate decision is _______ .

increase the sample size

gather more data

reject the null hypothesis

do not reject the null hypothesis

maintain status quo

		-2.120 and 2.120
		-2.131 and 2.131
		-1.753 and 1.753
		-1.746 and 1.746
		-2.567 and 2.567

Solution

Q6

miu = 76

I can gladly help you in all your question but you should post it in a new question with a image more bigger

because I can ony see Q6 a lit of bit