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An investigator hypothesizes that cholesterol levels in children migt be affected by educating their parents on proper nutrition and exercise. A sample of 40 familes with a child between the ages of 10 to 15 who has been diagnosed with high cholesterol agree to participate in the study. All parents are provided educational information on nutrition and exercise. After following the prescribed program, their child's toal cholesterol level is measured. The children's mean cholesterol is 175 with a standard deviation of 19.5. Is there significant evidence of a reduction in total cholesterol in the children? Run the appropriate test at the 5% level of significance and assume that the null value for total cholesterol is 191.
Therefore, probably the next Rose Bowl game will be played in freezing cold weather. Strong or weak? cogent or uncogent?
the ages of 32 people who signed up for a one year membership at gym last month are shown in the table below.
imagine that a student takes a 20-item multiple choice exam. she didnt study so all of her answers are guesses. each
1.a researcher wishes to compare the effect of the rate of stepping on heart rate in a step-aerobics workout. a
q1. you roll a single die numbered from 1 to 6 twice. what is the probability of rolling a six the first time and an
the probability that a tennis set will go to a tie-breaker is 19. what is the probability that two of three sets will
Credit card companies use a scoring model to determine the credit worthiness of a prospective card holder. Factors such as income, employment, home ownership, and credit history determine one's score.
Choose a business problem that is based upon an experience from your place of work or home environment. Briefly describe the business problem and the research methodology that you would employ to gather data and test your hypothesis
Find the probability that fewer than 7 are satisfied. c) Find the probability that 8 or more are satisfied. d) Find the probability that between 4 and 7 are satisfied with the airline.
a technician monitors a group of five computers that run an automated manufacturing facility. it takes an average of 15
Suppose for a particular set of data r = 0.889, ybar = 5.5, n = 15 and the equation for the regression line is yhat = 3.5 + 2.5x. Find the best-predicted value of y given that x = 2.0.
Fixed costs of $9,200 per month and variable costs of 70 cents per unit produced. Each item is sold to retailers at a price that averages 90 cents.
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