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A sample of 40 women is obtained, and their heights (in inches) and pulse rates (in beats per minute) are measured. The linear correlation coefficient is 0.238 and the equation of the regression line is y-hat=18.2+0.95x , where x represents height. The mean of the 40 pulse rates is 74.4 beats per minute. Find the best predicted pulse rate of a woman who is 68 inches tall. Use a significance level of 0.01.
The best predicted pulse rate of a woman who is 68 inches tall is ____ beats per minute.
in order to determine the average weight of carry-on luggage by passengers in airplanes a sample of 16 pieces of
assume that the heights of women are normally distributed with mean of 63.6 inches and a standard deviation of 2.5
A researcher conducts an experiment comparing two treatment conditions and obtains data with 10 scores for each treatment condition.
Why is sampling strategy important? Please provide one or two examples from your work or past experience?
Solve the problem using the graphical solution procedure. Find out the optimal percentage allocations and the optimal total portfolio return
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
A study of 35 golfers showed that their averages score on a particular course was 92. The standard deviation of the sample is 5.
What does the standard deviation mean? Interpret the standard deviation relative to the average or mean?
a. the length of time it takes for gandolfs fireworks to explode after they are launched is presumed to be uniformly
The monthly sales demand for a new product is uncertain, but it is considered to be adequately described by a normal random variable with mean 50,000 units and variance 100,000,000.
according to the census bureau 68 of americans owned their own homes in 2003. a local real estate office wants to see
Want a sample size of about 60 (30 controls and 30 cases). At 5% significance and 80% power.How do i determine the standard deviation and mean difference.And how do i arrive at the 60? my study design is case-control.
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