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Author Question: A department store has determined that 25 of all its sales are credit sales. A random sample of 75 ... (Read 195 times)

SO00

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on: Jun 24, 2018
A department store has determined that 25 of all its sales are credit sales. A random sample of 75 sales is selected.
 a. What is the probability that the sample proportion will be greater than .34?
  b. What is the probability that the sample proportion will be between .196 and .354?
  c. What is the probability that the sample proportion will be less than .25?
  d. What is the probability that the sample proportion will be less than .10?

Question 2

Assume z is a standard normal random variable. Then P(-1.5  z  1.09) equals _____.
 a. .4322
  b. .3621
  c. .7953
  d. .0711


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jgranad15

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Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .0359
b. .8411
c. .5
d. .0014

Answer to Question 2

c


SO00

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Reply 2 on: Jun 24, 2018
Great answer, keep it coming :)

marict

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Reply 3 on: Yesterday
Excellent

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