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A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. Assuming a population standard deviation of three hours, what is the required sample size if the error should be less than a half hour with a 99% level of confidence?
At the .05 significance level, can we conclude that the guideline is still reasonable?
Recent studies indicate that the typical 50-year-old woman spends $350 per year for personal-care products. The distribution of the amounts spent is positively skewed.
let x denote the weight gain in pounds per month for a calf. the probability distribution of x is shown below.xnbsp
slot machines have three drums with the same number of positions on each drum. each position contains a symbol. when
a random sample of n 400 measurements is drawn from a binomial population with probability of success .21. give the
Select the variable team salary and find the mean, median, and the standard deviation
Here are the DMS odor thresholds for 10 untrained students:
Solve different inventory control problems using an appropriate OR method.
the true highway mileage y of a specific brand of hybrid vehicle has a normal distribution with a mean of 42 and a
70 of adults in a european city say that they enjoy using public transportation. if a random sample of 8 adults is
Describe the "third variable problem" as it relates to correlation and provide an example of how you might see this played out in your own field.
question golds gym selected a random sample of 10 customers and monitored the number of times each customer used the
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