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Biting an unpopped kernel of popcorn hurts! As an experiment, a self-confessed connoisseur of cheap popcorn carefully counted 773 kernels and put them in a popper. After popping, the unpopped kernels were counted. There were 86.
a) Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
b) Check the normality assumption.
c) Try the Very Quick Rule. Does it work well here? Why, or why not?
d) Why might this sample not be typical?
If 1 man aged 18-24 is arbitrarily chosen, determine the probability that his serum cholesterol level is between 165 and 200.
Of the 1,4000 homemakers sampled, 420 were able to identify the brand by name. Compute the standard error of the proportion.
A doctor believes that the standard deviation of systolic blood pressure is 450. A random sample of 24 patients found a standard deviation of 520. Assume the variable is normally distributed and a = 0.01. What are the critical values?
There are two telephone lines A and B. Let E1 be the event that line A is being used and E2 be the event that line B is being used
Find the t c for a 90% confidence level with a sample size of 18.
Among 500 freshmen pursuing a business degree at a university, 347 are enrolled in an economics course, 204 are enrolled in a mathematics course, and 160 are enrolled in both an economics and a mathematics course.
Difference between the discrete and the continuous random variable.
Plot a scatter diagram of the results with Depth of Water as the independent variable.
Perform all pairwise comparisons among the three programs, using a Tukey adjustment and an overall significance level of 0.05, then interpret all your results.
The following show the hours of sleep on weeknights for a sample of individuals age 49 and younger and for a sample of individuals age 50 and older.
A process follows the binomial distribution with n = 8 and p = .3. Find
If a card is drawn at random from a standard 52-card deck, what is the probability that the card drawn is one of the following?
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