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A test is composed of six multiple choice questions where each question has 4 choices. If the answer choices for each question are equally likely, find the probability of answering more than 4 questions correctly.
Statistics and Probability, Statistics
You have two investments that either make money or lose money. Each one has a 60 percent chance of making money, and a forty percent chance of losing money. There is a 30 percent chance that both investments make money. ...
Waterton Lakes National Park in Alberta has 6 trails that reach the icefields. If a hiker wishes to reach the icefields in 3 different ways during a visit, how many different possibilities would there be?
Suppose the timing device used in the men's race failed to activate at the start of the race and instead began to record the times seconds into the race. Consider how the competitors' times would be affected. Would the s ...
A researcher is working on a study that examines the wellbeing of older adults. She has an interest in finding if there is a difference in life satisfaction scores (measured on a multi-item Likert scale) by ethnicity (Af ...
Boxes of sugar are filled by machine with considerable accuracy. The distribution of box weights is normal and has a mean of 32 ounces with a standard deviation of only 2 ounces. A quality control inspector takes a sampl ...
You decide to further your research project by hypothesizing that the true average core body temperature amidst higher ambient temperature and humidity levels for the population who do not use electric fans is greater ...
The new Fore and Aft Marina is to be located on the Ohio River near Madison, Indiana. Assume that Fore and Aft decides to build a docking facility where one boat at a time can stop for gas and servicing. Assume that arri ...
A 1995 study by the School of Public Health reported that 87?% of male students who live in a fraternity house are binge drinkers. The figure for fraternity members who are not residents of a fraternity house is 71?%, wh ...
41% of the doctors in America are dentists. If a random sample of size 826 is selected, what is the probability that the proportion of doctors who are dentists will be less than 40%?
In a hypothesis test, we use a sample to gain insight on what is likely the outcome for the population. In your example, that is a probability of 1 out of 20 as there were 20 people in the class. A hypothesis test might ...
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