Percentage of statistics students
You want to determine the percentage of statistics students who get grades of C or better. How many students should you survey to be 95% confident that the sample percentage is off by no more than 2 percentage points.
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In the gallop poll of 1000 adults, 930 said that restaurants and bars must refuse service to patrons who had too much to drink. Determine a 90% confience interval for true percentage of patrons with this view. Determine the point estimate for the
This group had mean score of 550 and population standard deviation of 140. Determine the 95% confidence interval for the population mean for the GRE test. Identify the point estimate for the mean and the margin of error.
Suggest an experiment where we ask what kind of car - either domestic (e.g., Chevrolet, Ford, Chrysler, etc.), foreign built abroad (e.g. a Toyota built in Japan) or foreign built in U.S. (e.g., a Toyota built in Kentucky) - and style (sedan, hatc
The Phillies were accused of cheating their beer customers by not putting enough beer in their 12 oz cups. When 15 cups were selected at random, they were found to have a mean of 11.7 ounces with a standard deviation of 0.5 ounces.
A researcher desires to estimate the mean serum cholestreol level for college age women. In a past study the standard deviation for this measure was 42 units.
Two students, John and Mary, are both registered for same course. If John attends 80 percent of time and Mary 60 percent (and their attendance patterns are totally independent), then if at least one of John or Mary are in attendance on given day,
A single variable X can explain a large percentage of variation in some other variable Y when the two variables are?
How many hamburgers should the restaurant stock to be 99% sure of not running out on given day? Place you answer, rounded to the nearest whole number in the blank. For example, 345 would be a legitimate entry
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