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In a survey of 601 males ages 18-64, 399 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. If convenient use technology to construct the confidence intervals.
The 90% confidence interval for the population proportion p is
The 95% confidence interval for the population proportion p is
The largest salary on the list is $100,000 and is accidentally changed to $1,000,000. What is the new standard deviation?
What is the importance of the null hypothesis? Why has it been the backbone of mainstream hypothesis testing for decades? What are its limitations?
How large should the sample size be if she wishes to be accurate within $0.10. A previous study showed that the standard deviation of the price was $.12.
Some studies suggest a beta-carotene intake over 3000 mcg may protect against ?macular degeneration. What percentage of people has a dietary beta-carotene intake of at least ?3000 mcg?
The following set of data represents the number of hospitals for selected states. Find the mean, median, mode, midrange, range, variance, and standard deviation for the data?
The herbal formula is effective in preventing colds? Is the probability that the observed difference occurred by chance small, less than or equal to 1 in 20 (0.05)?
Each inspector makes his or her inspection at a different time. What is the probability that at least one inspector will find a defective widget?
the following problem was given to 60 student and doctors assume there exists a test to detect a disease say dwhose
ABC insurance sells term life insurance policies. If the plicy holder dies during the term of the policy ABC pays out $100000. If the person does not die ABC pays nothing and there is no further value to the policy.
Identify the indicated values or interpret the given display. In a survey of 703 randomly selected workers,
What proportion of children 10-15 years would be classified as hyperlipidemia(assume that hyperlipidemia is defined as a total cholesterol level over 200)?
at what prices would google have to close at in order for it to be considered statistically unusual? you should have a
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