The proportion of adult women in Latvia is approximately 54%. A marketing survey telephones 400 people...
The proportion of adult women in Latvia is approximately 54%. A marketing survey telephones 400 people at random.
a) What is the sampling distribution of the observed pro- portion that are women?
b) What is the standard deviation of that proportion?
c) Would you be surprised to find 56% women in a sample of size 400? Explain.
d) Would you be surprised to find 51% women in a sample of size 400? Explain.
e) Would you be surprised to find that there were fewer than 180 women in the sample? Explain.
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The proportion of adult women in Latvia is approximately 54%. A
marketing survey telephones 400 people...
ome he proportion of adult women in the United States is approximately 51%. A marketing survey...
ome he proportion of adult women in the United States is approximately 51%. A marketing survey telephones 300 people at random. (a) (3pts) What is the sampling distribution of the observed proportion that are women? State your answer with the mean and the standard deviation. 30 o (b) (3pts) would you be surprised to find 56% women in a sample of size 300? Explain. (c) (2 pts) What is the probability that more than S0% women in this survey? (d)...
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verify the answers in number 5
RS that men ad women realction times, so she wants to stratify gender. on The group of 96 people contains 43 men. In previous studies of this type, researchers have found that the times range from 5 to 20 seconds for men and from 3 to 14 seconds for women. The costs of sampling allocation, find the approximate sample size necessary to estimate the average reaction time for the group to within 1 second....
ome he proportion of adult women in the United States is approximately 51%. A marketing survey telephones 300 people at random. (a) (3pts) What is the sampling distribution of the observed proportion that are women? State your answer with the mean and the standard deviation. 30 o (b) (3pts) would you be surprised to find 56% women in a sample of size 300? Explain. (c) (2 pts) What is the probability that more than S0% women in this survey? (d)...
Assume that the heights of adult Caucasian women have a mean of 63.6 inches and a standard deviation of 2.5 inches. If 75 women are randomly selected, find the probability that they have a mean height between 63 and 65 inches. O A. 0.3071 B. 0.2119 OC. 0.0188 OD. 0.9811 O E. There is not enough information to determine the probability A recent survey asked respondents how many hours they spent per week on the internet. The sample mean was...
1. Marketing: Customer Loyalty: In a marketing survey, a random sample of 730 women shoppers revealed that 628 remained loyal to their favorite supermarket during the past year (i.e. did not switch stores). (Source: Trends in the United States: Consumer Attitudes and the Supermarket, The Research Department, Food Marketing Institute). a) Let p represent the proportion of all women shoppers who remain loyal to their favorite supermarket. Find a point estimate for p. b) Find a 95% confidence interval for...
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verify the answers in number 5
RS that men ad women realction times, so she wants to stratify gender. on The group of 96 people contains 43 men. In previous studies of this type, researchers have found that the times range from 5 to 20 seconds for men and from 3 to 14 seconds for women. The costs of sampling allocation, find the approximate sample size necessary to estimate the average reaction time for the group to within 1 second....
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