Suppose it is known that 80% of Americans own a laptop. If a random sample of 100 Americans were surveyed, a) what is the mean and standard deviation of the sample proportion? b) what is the probability that the proportion of the sample who owned a cellphone is greater than 83% c) what is the probability that the proportion of the sample who owned a cellphone is between 78% and 84?
Suppose it is known that 80% of Americans own a laptop. If a random sample of 100 Americans were surveyed, a) what is the mean and standard deviation of the sample proportion? b) what is the probability that the proportion of the sample who owned a cellphone is greater than 83% c) what is the probability that the proportion of the sample who owned a cellphone is between 78% and 84?
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 4ECP: Show that the probability of drawing a club at random from a standard deck of 52 playing cards is...
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Transcribed Image Text:Suppose it is known that 80% of Americans own a laptop. If a random sample of 100 Americans were surveyed,
a) what is the mean and standard deviation of the sample proportion?
b) what is the probability that the proportion of the sample who owned a cellphone is greater than 83%
c) what is the probability that the proportion of the sample who owned a cellphone is between 78% and 84?
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VIEWStep 3: Calculate probability that the proportion of the sample who owned a cellphone is greater than 83%
VIEWStep 4: Calculate probability that the proportion of the sample who owned a cellphone is between 78% and 84%
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