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The College Boards are administered each year to thousands of high school seniors, and these scores are approximately normally distributed with a mean of 500, and a standard deviation of 100. Suppose a random sample of 100 students was drawn and the mean exam score was 545 with standard deviation of 49. Is the 45 point difference between the sample and the population merely due to chance? Use the appropriate two-tailed test with an α = 0.05.
Reggie Miller of the Indiana Pacers is the National Basketball Association's best career free throw shooter, making 89% of his shots. Assume that late in a basketball game, Reggie Miller is fouled and is awarded two shots.
Archaeopteryx is an extinct beast having feathers like a bird but teeth and a long bony tail like a reptile. Five fossil specimens have preserved both the femur and humerus bones. The measurements (in centimeters) for each bone are given below.
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..
Explain the difference between a discrete and a continuous random variable. Give two examples of each type of random variable.
What type of data would you obtain from a rating scale? Prove an application/example in your response of how this instrument could be used. For what population would you use a graphical rating scale?
Find the least-squares regression line to predict chirps per second based on temperature. increase in temperature. Predict the chirps per second if it is 83.3 degrees.
If the Pearson Correlation is 0.18, what do we get, what is the value called, and what does it tell us?
Following sample data shows the weekly closing price of ABC stock. Compute the sample mean and variance from this data set.
It has been reported that 80% of taxpayers who are audited by the Internal Revenue Service end up paying more money in taxes. Assume that auditors are randomly assigned to cases, and that one of the ways the IRS oversees its auditors is to monitor..
Enlarged to 14 measurements, by including two additional measurements having a common value of 40 each. Find the standard deviation of the sample of 14 measurements.
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The booked passengers actually arrive for the flight. Estimate the probability that if the company books 278 persons. not enough seats will be available.
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