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Q. A researcher wants to study the effect of regular exercise on cholesterol levels. The researcher compares the cholesterol levels of 50 people who belong to a local gym and exercise regularly with the cholesterol levels of 50 people from the community who did not exercise regularly. The cholesterol levels of the members of the gym were substantially lower. The researcher can conclude that
A.belonging to a gym reduces cholesterol level. B.exercising regularly reduces cholesterol level.
C.members of a local gym who exercised regularly had lower cholesterol levels than those in the community who did not exercise regularly.
Q. All but one of the following statements contain a blunder. Which one does not contain a blunder?
A."There is a correlation of r = 0.54 between the position a football player plays and his or her weight."
B."The correlation between amount of fertilizer and yield of tomatoes was found to be r = 0.33."
C."The correlation between the gas mileage of a car and its weight is r = 0.71 gallon-pounds."
What statistical procedure was used to analyze data in study B?
Estimate the population mean
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Conduct an analysis of variance
Write introduction to SPC (STATISTICAL PROCESS CONTROL)? Describe the use of SPC tools used at D2D?
Evaluate the mean wait time and throughput rate
Plan the scatter diagram
LINEAR PROGRAMMING MODELS
Below is a plot of the Olympic gold medal winning performance in the high jump (in inches) for the years 1900 to 1996.
Basic Statistics problem
Find out the probability
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
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