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Assume that, nationwide, 20% of grade-school students develop influenza. Consider a grade-school class of 25 students ( I changed 15 to 25).
A. Find the probability that exactly 6 students in this class develop influenza.
B. Find the probability that at least 8 students in this class develop influenza.
C. Find the mean and standard deviation of X, the number of students in class, who will develop influenza.
A random sample of 100 students at Southern University was collected. The mean age was found to be 24.2 years, with a standard deviation of 3.4 years.
If the basket ball player is a 74% free throw shooter, then, on average, how many free throws will he or she make in a game with eight free throw attempts?
In which category is ANOVA properly classified?
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
An advantage of the permutation test over the t test for a difference in means, can Permutation tests be used for tests when we believe the two populations differ under the null hypothesis.
Suppose that an IQ test was given to a large group of persons, the scores are assumed to be from a normally distributed population, that mean = 100 and s (standard deviation) = 15.
Determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
What is the probability she received 5 or more email during the same period?
For each of the following problems, assume that the homogeneity of variance assumption has not been met and that you will need to use the adjusted Welch statistic.
Use the method of least squares to model the relationship between x and y.
A study of cardiovascular risk factors compared heavy smokers, light smokers, and nonsmokers. Both men and women were included in the study so that the two factors are smoking level and gender.
The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast
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