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Margin of Error based upon T-Distribution...In a survey, 28 people were asked how much money they would spend on the child's birthday. The sample results were roughly bell shaped with a mean of $41 and a standard deviation of $8. Find the margin of error at a 95% confidence level. Give answer to two decimal points.
What is the probability of finding 1 or more children with chronic bronchitis in a population where the incidence rate of chronic bronchitis is 10% (like the one above?)
the upper limit of the 95 confidence interval for the population proportion p given that n 300 and hat p 0.10 is
it is claimed that in a bushel of peaches less than ten percent are defective. a sample of 400 peaches is examined and
1. a quiz has 5 multiple-choice questions where each question has 4 possible answers but only 1 is the correct
The Skytek Avionics company uses a new production method to manufacture aircraft altimeters. A simple random sample of new altimeters resulted in errors listed below.
In an analysis of variance summary table, if the mean square between = 35 and the mean square within = 28, then the null hypothesis of the groups having the same mean is?
in a study of facial behavior people in a control group are times for eye contact in a 5-minute period. their times are
it is believed that the median annual starting salary of a freshman engineering graduate is 40000. if we record the
Compute the correlation coefficient between the total prize and the difference between Jill's prize and Bill's prize in terms of µ and σ2.
Find the mean, median, mode, sample variance, and range. Do you think that this sample might have come from a normal population? Why or why not?
Below is the data set for the amount of trash by ten households (in pounds per day). Assume the population is normally distributed
in a poll respondents were asked if they have traveled to europe. 68 respondents indicated that they have traveled to
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