Mathematics, 31.01.2022 15:10 indiii
In spite of the potential safety hazards, some people would like to have an internet connection in their car. A preliminary survey of adult Americans has estimated this proportion to be somewhere around. 30 (USA today, May 1, 2009).
a. Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an internet connection in their car to within .02 with 95% confidence.
b. The formula for determine sample size given in this section corresponds to a confidence level of 95%. How would you modify this formula if a 99% confidence was desired?
c. Use the given preliminary estimate to determine the sample size required to estimate the proportion of adult Americans who would like an internet connection in their car to within .02 with 99% confidence.
Answers: 2
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Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.
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In spite of the potential safety hazards, some people would like to have an internet connection in t...
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