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The use of electrical stimulation (ES) to increasemuscular strength is discussed in the Journal ofOrthopedic and Sports Physical Therapy. Seventeenhealthy volunteers participated in the experiment.Muscular strength, Y, was measured as a torquein foot-pounds, and ES, X, was measured in mA(microamps). The equation for the line of best fit isgiven as Y = 1.8X + 28.7, and the Pearson correlationcoefficient was 0.61.a. Was the correlation coefficient significantlydifferent from zero? Use α = 0.05.b. Predict the torque for a current equal to 50 mA.
Consider the formula used for any confidence interval and the elements included in that formula. What happens to the confidence interval if you (a) increase the confidence level, (b) increase the sample size, or (c) increase the original sample st..
Determine the class with the greatest number of data values.
Calculate separately for 1983 and 1987, the 95% confidence interval for the proportion of students who had driven an automobile while drinking.
Critically discuss understanding the normal distribution and the factors that affect its shape important in solving business and marketing-related questions?
Write a short paragraph explaining to the psychologist what can be concluded from this output (assuming the technical conditions are met).
Suppose a fair coin is tossed n times. The probability of obtaining head and tail are the same because this is a fair coin. The proportion of heads is defined as the number of heads appeared divided by n.
How close is the calculated value to your experimental value?
Then suppose that a sample of 4000 women had produced the sample mean 275, and again give the 95% confidence interval for the population mean. What can you say about the effect of sample size on confidence intervals?
Find out and interpret coefficients of correlation and determination for U. S. prices versus Canadian prices.
Develop a regression model that could be used to predict the final average in the course based on the first test grade. Predict the final average of a student who made an 83 on the first grade.
Find out the sample size raised by mean also standard deviation, a sampling distribution may approach among which of the following values.
Write a sentence showing how the outcome of the hypothesis test and the measure of effect size would appear in a research report.
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