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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."
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
What is the city mileage standard deviation for this SUV model?
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
What is the equation for this regression model?
High levels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. Diabetes can lead to many complications such as blindness and heart disease. A random sample of 180 individuals had their blood su..
Consider the following stemplot. The mean of the data represented in this stemplot ?
Examined the effect of body position on blood pressure
Determine whether the method of delivering teaching influences adherence with antiretroviral therapy.
A researcher measures a response variable Y and explanatory variable X on each of several objects. A scatterplot of the measurements is as follows.
Compute descriptive statistics for each stock and the S&P 500. Comment on your results. Which stocks are the most volatile? Compute the value of beta for each stock. Which of these stocks would you expect to perform best in an up market? Which..
Conduct an analysis of variance
Basic Statistics problem
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