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The mean height of women in a country (age 20-29) is 64.3 inches. A random sample of 75 women in this age group is selected. what is the probablity that the mean height for the sample is greater than 65 inches?
What is the probability that more than 25% of the business travelers say that the reason for their most recent business trip was an internal company visit?
Kannon Camera has developed a new camera that it claims can take an average of more than 10 photographs per second. You decide to evaluate the company's claim. In summary, in this problem you are given:
The relationship between energy consumption and average car gas mileage, controlling for GDP.
To test this notion, eight paid volunteers were placed (individually) in a room in which there was no light from the outside and no clocks or other indications of time.
Compute the mean and variance of the following discrete probability distribution. A cola-dispensing machine is set to dispense on average 7.00 ounces of cola per cup. The standard deviation is 0.10 ounces. The distribution of amounts dispensed foll..
The mean height of a certain plant is 160 centimeters. Suppose a botanist wants to carry out a hypothesis test to see if the mean height when these plants are treated with a certain chemical differs from 160. What is the null hypothesis and the al..
The following is the number of minutes to commute from home to work for a group of automobile executives.
Illustrate that probability distribution of X satisfies properties of a discrete probability distribution.
Finding the probability of sample and describe the sampling distribution of the sample means.
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.
Roger has read a report that the weights of adult mail Siberian tigers have a distribution which is approximately normal with mean μ = 390 lb and σ = 65 lb.
A sample of 19 albino Hungarian banded aardvarks was examined for nose length. Since this is a small sample, how various degrees of freedom will be used to find the t-score.
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