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Americans spend over $30 billion dollars on a variety of weight-loss products and services. In a study of retention rates of those using the Platinum Program at Jenny Craig from May 2001 to May 2002, it was found that about 25% of those who began the program dropped out in the first four weeks.7 Assume that we have a random sample of 300 people who are beginning the program.
(a) What is the mean number of people who will drop out of the Platinum Program in the first four weeks in a sample of this size? What is the standard deviation?
(b) What is the approximate probability that at least 210 people in the sample will still be in the Platinum Program after the first four weeks?
suppose you hear anold-timer say why in my day kids were much more respectful and didnt caue as much trouble as they do
The data in the scatterplot below are an individual's weight and the time it takes (in seconds) on a treadmill to raise his or her pulse rate to 140 beats per minute. The o's correspond to females and the +'s to males.
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
Clark Heter is an industrial engineer at Lyons Products. He would like to determine whether there are more units produced on the afternoon shift than on the day shift.
A ball is then selected at random from urn 2. if the ball selected from urn 2 is red, what is the probability that the ball transferred from urn 1 was...(i)red?
in a brand awareness study if 25 of a group of 35 males identify the brand correctly and 15 of a group of 35 females
For each of the F statistics given above find the degrees of freedom and an approximate P-value. Summarize the results of these tests.
the first internet bank wants to encourage its customers to do all their banking online. it offers higher interest to
What are post hoc comparisons, and why do researchers make them? Why do researchers not use the Bonferroni procedure of procedures for post hoc comparisons?
In an air-pollution study performed at an experiment station, the following amount of suspended benzene-soluble. Assuming that the population sampled is normal, construct 95% confidence interval for the corresponding true mean.
the number of robberies in each precinct in 2009 is what level of measurement?1. none2. nominal3. ratio4.
Write ten-step study plan with suitable example that will permit you to analyze your data.
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