Describe sampling distribution of sample proportion

Reference no: EM13100312

1) A store has determined that 25% of all sales are credit sales. A random sample of 75 sales is selected. What is the probability that the sample proportion will be:

a) greater than .34?

b) between .196 and .354?

c) less than .25?

d) less than .10?

2) 10% of items produced by a machine are defective. A random sample of 100 items is selected and checked for defects. What is the probability that the sample will contain:

a) more than .025?

b) less than .13 defective units?

Reference no: EM13100312

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