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A study examined possible reasons for students going on academic probation. Students who spent more than 20 hours a week playing video games were classified as "heavy gamers." Of the 342 students on academic probation in the study, 127 were found to be heavy gamers. p^=.371
Referring to the previous question, consider the distribution of all sample proportions p^ when the sample size is 342. Calculate the mean and standard deviation of this distribution, assuming that p=0.4
Create an experiment that will address these concerns. Pay particular attention to the factors, explanatory and response variables, any blocks or matching characteristics, and the treatment conditions used in the experiment.
(a) Identify the null hypothesis and the alternative hypothesis. (b) Determine the test statistic. (c) Determine the p-value. (d) Is there sufficient evident to support the claim that regular exercise helps weight loss?Justify your conclusion.
if a random variable can take on a countable number of values one would use a discrete
You are given the sample mean and the sample standard deviation. use this information to construct the 90% and 95% confidence intervals for the population mean.
If the airline books 76 people on a flight for which the maximum number is 74, what is the probability that the number of people who show up will exceed the capacity of the plane?
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
Is there sufficient evidence to conclude that a significant amount of improvement took place? Calculate the mean and standard deviation. Determine which test statistic applies, and calculate it.
Check the assumptions and conditions for inference.- Write a 95% confidence interval.- Explain what your interval means in this context.
question the marketing manager of a larger supermarket chain would like to use shelf space to predict the sales of pet
Which one/s of these factors (independent variables) will have a negative correlation with bone density and which one/s will have a positive correlation?
Would you expect the variance to be larger or smaller than the variance associated with the probability function used in the previous exercise? Verify your answer by computing the variance.
What did the Emancipation Proclamation do? Name and list all of them?
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