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246804

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60

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This past week, the temperature has fluctuated quite a bit. From Monday to Sunday, temperatures in Fahrenheit have been the following: 62, 68, 52, 40, 78, 72, 60. The standard deviation is given as 13 and does not need to be calculated. Convert 40 into a z-score. How many standard deviations away from the mean is this?

Select the correct answer(s).

(0/0)

Explanation

Find mean = 61.7 then (40-61.7)/13

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246806

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60

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How many different football teams of 11 members may be created from 13 men, without regard to the position played by any of the members?

Select the correct answer(s).

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Explanation

13!/11!2!

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246807

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180

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You are asked to create a 95% confidence interval with a margin of error no larger than 3 while sampling from a normally distributed population with a standard deviation of 5. What is the minimum required sample size?

Select the correct answer(s).

(0/0)

Explanation

The margin of error needs to be < or = to 3. So let 3 = 1.96 (5/(n^1/2)) solve for n

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120

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Assume there is an election involving three parties: D, R and I. The probability of D winning is .12, R winning is .78 and I winning is .10. Match the following probabilities.

Match the text (click and drag)

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Explanation

add the probabilities

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Match the text
P (D or R)
P (D or I)
P (R or I)

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.88
.22
.90

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