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Health insurance
Based on a 2007 survey of U.S. households (see www.census.gov), 87% (out of 3060) of males in Massachusetts (MA) have health insurance.
a) Examine the conditions for constructing a confidence interval for the proportion males in MA who had health insurance.
b) Find the 95% confidence interval for the percent of males who have health insurance.
c) Interpret your confidence interval.
Find a % confidence interval for the difference in average absorption time for the two drugs. Does it appear that one drug is absorbed faster than the other at the % significance level.
Which of the following statistics is not a measure of central tendency?
The CEO of the business has nothing better to do wheras measured the temperatures of 26 department managers 1 to 4 times every day to get a total of 123 measurements.
1. Let X denote the mean of a random sample of size 100 from a distri bution that is x2(50). Compute an approximate value of Pr (49 X 51).
Make a relative frequency histogram by using ten-point intervals to show the distribution of the scores.
suppose you flip a fair coin 10 times and it results in 1 tail and 9 heads. if you toss that coin again what is the
we wish to estimate the mean using a sample size of n = 49. Find the probability that we could be correct within 1kg/m 2 .
In a random sample of 26 people, the mean number of books they had read in the past year was 14.93 books and the standard deviation was 16.60 books.
What is the sample proportion from an American Express sponsored survey that found 355 of 546 business travelers use a laptop computer on overnight business trips?
a sample of 15 teachers from rhode island has an average salary of 35270 with a standard deviation of 3256. as ample of
Find the 90% confidence interval for the unknown mean operating life of the entire shipment and sketch a figure for the results of part a.
Imagine that you have a portfolio of stocks. You want to compare the performance of your stocks to the market as a whole. You learn that the population mean,μ, of stock returns is 7%, and that the population standard deviation, σ, is 2%.
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