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In how many ways can a student answer an 8-question, true-false examination if he marks half the questions true and half the questions false?
a recent report in usa today indicated a typical family of four spends 490 per month on food. assume the distribution
What is the probability that a dog owner will spend more than $130 on medical care in a given year? What is the prbability that a cat owner will spend $160 or more on medical care in a given year?
In the study of age and systolic blood pressure of five randomly selected subjects, a researcher reported the following data.
if r -0.665 and n 6 test the significance of the correlation coefficient at a .05 reject p 0 because 2.68gt 2.57do not
if you want to be 95 confident of estimating the population mean to within a sampling error of plus or minus 6 and the
Evaluate a simple aggregate price index for 2004. Use 2000 as the base period - Estimating the simple aggregate price index.
in hamilton countyohio the mean number of days needed to sell a house in 86 days. data for the sale of 40 houses in a
Find a 99% confidence interval for mu1-mu2, the difference in population means when it is known in advance that the population variances are 4 and 5 respectively.
a student wanted to construct a 95 confidence interval for the mean age of students in her statistics class. she
a survey provided the estimate that the mean number of hours of television viewing per household is 7.25 hours per day.
If university officials say that at least 70% of the voting student population supporting the fee increase, what conclusion can be drawn based on a 95% level of confidence?
College graduates, and half of the college graduates are married. What is the probability that a randomly chosen worker is: Neither married nor a college graduate?
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