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According to AccuData Media Research 36% of televisons within the chicago city limits are tuned to eyewitness news at 5pm on sunday nights. At 5pm on a given sunday 2500 such tv are randomly selected and checked to determine what is being watch. Would it be unusual to find that 954 of the 2500 tvs are tuned to eyewitness news?
Your supervisor has asked you to conduct a survey about consumers' buying habits. For this task, you surveyed 100 men and 100 women at a local shopping mall.
Suppose we have the following information from a simple regression: What is the coefficient of determination? What is the correlation coefficient?
Replace (or exchange) 10% of its model I and 18% of its model II. If a model is selected at random, find the probability that it will be defective.
Find the probability that a random sample of 4 male Siberian tigers will have a sample mean weight more than 450 lb.
Suppose that 1% of all people have a particular disease. A test for the disease is 99% accurate. This means that a person who test positive for the disease has a 99% chance of actually having the disease
The Palace Hotel believes it's customers may be waiting too long for room service. The hotel operations manager knows that the time for room service orders is normally distributed and he sampled 10 room service orders during a 3-day period
Which statement is true for a statistical study?
Given a binomial distribution with n=29 and p=0.83, would the normal distribution provide a reasonable approximation? Why or why not.
Many educators feel their grades should fit a normal distribution and often apply curves to make them fit one. One way to do this is to convert numeric grades to z scores using the mean and standard deviation for the grades, then use an equation s..
Research question: Are mean crash damages same for these 3 vehicles? Crash1 Crash Damage ($).
In a recent national survey, the mean weekly allowance for a nine-year-old child from his/her parents was reported to be $3.65. A random sample of 45 nine-year-olds in northwestern Ohio revealed the mean allowance to be $3.69 with a standard devia..
Compute the variance and standard deviation of the number that will arrive within two days.
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