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A doctor wants to estimate the HDL cholesterol of all 20-to 29- year-old females. How many subjects are needed to estimate the HDL cholesterol within 3 points with 99% confidence assumming o=14.5?
Suppose the doctor would be content with 90% confidence. How does the decrease in confidence affect the sample size required?
A 99% confidences level level requires ___subjects.
(Round up to the nearest whole number as needed.)
A 90% confidences level level requires ___subjects.
How does the decrease in confidence affect the sample size required?
A. the lower the confidence level the larger the sample size
b. the sample size is the same for all levels of confidence
c. the lower the confidence level the smaller the sample size
The production manager for Beer etc. produces 2 kinds of beer: light and dark.
the average monthly electric bill of a random sample of 256 residents of a city is 90 with a standard deviation of
Which supplier and which shipping quantity will provide the lowest costs for Eight Flags and Which supplier and shipping quantity will provide the lowest total cost for Horizon Cellular?
A sample is taken prior to a major election of likely voters. The null hypothesis is that the votes will be split 50/50. One candidate gets 54% of the support in the sample and the p-value for this sample is calculated to be 0.12.
The boys with certificates of recognition. What time would the boys need to beat in order to earn a certificate of recognition from the fitness association?
How large a sample is required if the 97 percent level of confidence is used and the estimate is to be within $2,500? The standard deviation is $16,000.
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of 43 bank customers depositing a check 18 received some cash back. construct a 90 confidence interval for the
A study of 200 advertising firms revealed their income after taxes: What is the probability an advertising firm selected at random has under $1 million in income after taxes?
the take home pay of cody and the cpi for 2007 and 2004
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