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Two students, Jen and John, are registered for the same class and attend independently to each other, Jen 96% of the time and John 88% of the time. What is the probability that on any given day
a) at least one of them will not be in class?
b) both will be in class?
Adult women in Japan have heights which are normally distributed with mean 158 centimeters and standard deviation 6 centimeters. Which country has the higher percentage of women taller than 167 centimeters?
Consider the following news headline, "Cigarette Smokers Make Lower College Grades than Nonsmokers" The news article goes on to say that researchers at a university collected information on rate of cigarette smoking (total number of cigarettes sm..
Determine the 90% confidence interval estimate for the median number of hours of television watched per week by shut-ins.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
A small business owner is experiencing a high staff turnover and wants to design a study to investigate the problem. What is the probability of randomly chosen student scoring at least 60?
The average 1-ounce chocolate chip cookie contains 110 calories. A random sample of 15 different brands of 1-ounce chocolate chip cookies results in the following calorie amounts. At a=0.01 level
Would that daily sales figure be considered a potential outlier? why or why not? e) Find the probability that sales on a randomly selected day are at most $3445.
It has been claimed that women live longer than men; however, men tend to be older than their wives. Ages of sixteen husbands and wives from England were obtained. The null hypothesis of equality of means is rejected. What conclusion can be made f..
Find the probability that Marys total worth reaches $3000 at some point. (We assume here that Mary has to quit playing if she goes bankrupt so this is a gamblers ruin problem.)
the westchester chamber of commerce periodically sponsors public service seminars and programs. currently promotional
question a company hired 20 salespeople and gave them an initial sales skills examination test scores ranged from 68
Given a sample size of 9,245, a sample mean of 38, a standard deviation of 8.15, and a confidence level of 97%, calculate the lower bound of the confidence interval.
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