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[answered] 1. What is the critical value? a.3.29 b.6.93 c.19.4 d.3.89


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1. What is the critical value?

 

a.3.29

 

b.6.93

 

c.19.4

 

d.3.89 2. 3. 4. 5. Which of the two tests (test for treatment and test for blocks should

 

reject the null hypothesis using a level of significance of 0.05?

 

a

 

b

 

c

 

d Neither test

 

Only test for blocks

 

Both Tests

 

Only test for treatment 6. Find the critical value from the Studentized range distribution for

 

H0: ?1 = ?2 = ?3 = ?4 = ?5, with n = 35 at? = 0.01. Provide answer to

 

three decimal places (example, 3.254). 7. A researcher wishes to determine whether there is a difference in the average age of middle school, highschool, and

 

college teachers. Teachers are randomly selected. Their ages

 

are recorded below. Use ? = 0.01.Which of the following is a

 

correct statement about the means? 8. Researchers wanted to determine if the psychological profile

 

of healthy children was different than that for children

 

suffering from recurrent abdominal pain (RAP) or recurring

 

headaches. Results of the study are summarized in the

 

following table. Determine which pairwise means of the three

 

treatment groups, if any, are different using a familywise error

 

rate of alpha = 0.05. 9. A sample of 2,845 auto workers was selected to learn if they

 

would go on strike. Over 50% of those in the sample declared

 

they would strike. We can assume that the majority of all auto

 

workers favor a strike since the number sampled is large and

 

those in favor of a strike are over 50%. a. True

 

b. False

 

10. Which average is the largest measure of central tendency in a

 

negatively skewed distribution?

 

a?

 

b?

 

c?

 

d? Arithmetic mean

 

Median

 

Mode

 

Geometric Mean 11. Use the information in the following table for the next few

 

questions. The following statistics represent samples of copper wire

 

submitted by two companies for tensile strength testing (psi). 12. The middle 50 percent of the wires of Company A tested

 

between _____ and _____. Record the lower limit as a whole

 

number.

 

13. Which company's distribution has the larger dispersion

 

(answer either 'A' or 'B')?

 

14. The variance for Company A is _____? (whole numbers only) 15. A company has received 20 purchase orders. The shipping

 

department has been given 8 orders to fill. There are _____ different

 

orders the shipping department could be given to fill. (answer should

 

be numbers only - no commas).

 

16. The outcomes must be equally likely for the relative

 

frequency probability approach to be used. a. True

 

b. False 17. Medical statistics indicate that 20% of the population will have

 

cancer in their lifetimes. A group of 12 babies is selected at random.

 

Use the tables in the textbook to determine the following. The

 

probability that exactly 5 in the group will get cancer in their lifetime

 

is _____. Record the answer to four decimal places (x.xxxx).

 

18. Using the information from the previous question, the probability

 

that at least 5 will get cancer in their lifetime is ______. (x.xxxx)

 


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