Select one: A. do not reject H o B. reject H o C. don not reject H a D. None of

Question

Select one:

A. do not reject Ho

B. reject Ho

C. don not reject Ha

D. None of the above answers is correct

Question 15

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A population where each element of the population is assigned to one and only one of several classes or categories is a

Select one:

A. multinomial population

B. Poisson population

C. normal population

D. None of these alternatives is correct.

Question 16

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The degrees of freedom for a contingency table with 10 rows and 11 columns is

Select one:

A. 100

B. 110

C. 21

D. 90

Question 17

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A sample of 22 bottles of soft drink showed a variance of 0.64 in their contents. At 95% confidence, determine whether or not the standard deviation of the population is significantly different from 0.7. State the null and laternative hypothesis.

Select one:

D. None of the above answers is correct

Question 18

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For an F distribution, the number of degrees of freedom for the numerator

Select one:

A. must be larger than the number of degrees for the denominator

B. must be smaller than the number of degrees of freedom for the denominator

C. must be equal to the number of degrees of freedom for the denominator

D. can be larger, smaller, or equal to the number of degrees of freedom for the denominator

Question 19

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In order to determine whether or not a particular medication was effective in curing the common cold, one group of patients was given the medication, while another group received sugar pills. The results of the study are shown below.

We are interested in determining whether or not the medication was effective in curing the common cold. The hypothesis is to be tested at the 5% level of significance. The critical value from the table equals

Select one:

A. 3.84

B. 7.81

C. 5.99

D. 9.34

Question 20

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The owner of a car wash wants to see if the arrival rate of cars follows a Poisson distribution. In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken. You are given the following observed frequencies:

If the value of the test statisic is smaller than the critical value of the test statistic, what is the conclusion of the test?

Select one:

A. arrival of cars follows a Poisson distribution

B. arrival of cars does not follow a Poisson distribution test

C. is inconclusive

D. None of these alternatives is correct.

NEED HELP ASAP PLEASE!!!

Patients Cured Patients Not Cured Received Medication 70 10 Received sugar pills 20 50

Explanation / Answer

14) Correct Answer: Option (A)

15) Correct Answer: Option (D)

16) Correct Answer: Option (D)   Since (10-1)*(11-1) =90df

17) Correct Answer: Option (A)

18) Correct Answer: Option (B)

19) Correct Answer: Option (A)

20) Correct Answer: Option (A)

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