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Please explain the term analysis variance so a person without formal statistics education can understand.
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
Suppose that 10% of all adults jog. An opinion poll asks an SRS of 400 adults if they jog. a) What is the sampling distribution of the proportion p^ in the sample who jog?
The following problem develop the concept of determining the probability distribution of random variable and its mean and variance.
In 1,000 samples, assuming that H 0 is true, how many times would you expect to commit Type I error if:
At the 0.01 level of significance, is there evidence to support the professor's claim?
A recent study found that the average life expectancy of a person living in Africa is 53 years with a standard deviation of 7.5 years. If a person in Africa is selected at random
Estimate and interpret the p-value of the calculated test statistic above.
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
Using a 1% level of significance, can the hypothesis that the distributions for the student's scores are identical be accepted?
Assume that the cost for this type of hospital emergency room visit is normally distributed with a standard deviation of $92. Assume that the following questions about the cost of a hospital emergency room visit for this medical service.
14 machines are planned to be used for a 60-day production run for a customer. The operating time is 1660 hours. Upon failure, a machine must be returned to the manufacturer for repair.
A year ago, Air Force implemented new test for finding which candidates are most probable to become successful pilots. Now they wish to see if implementing pilot predictor test was a good idea. Scores have been standardized to facilitate comparis..
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