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In a study to determine whether counseling could help people loose weight, a sample of people experienced a group-based behavioral intervention, which involved weekly meetings with a trained interventionist for a period of six months. The following data are the numbers of pounds lost for 5 people.
18.2, 3.9, 17.1, 8.8, 19.6
It is reasonable to assume that the population is approximately normal. A researcher wants to know whether the mean weight loss is greater than 10 pounds. Compute the P-Value of the test.
Compute the Mann-Whitney U statistic for the following data. The numbers under the Group 1 and Group 2 columns are participant numbers.
a random sample of size 34 is to be selected from a population that has a mean ? 45 and a standard deviation ? of 10.a
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
The margin of error for a confidence interval used for an opinion poll takes into account the fact that people who did not answer the poll questions may have had different responses from those who did answer the questions.
a news article reports that americans have differing views on two potentially inconvenient and invasive practices that
Find the value of population mean the mean of the distribution of sample proportions.
Does it appear that there is a trend over the last five weeks?
a. Construct a frequency distribution table. b. Construct a histogram and interpret the histogram.
An experiment studied the effects of starch source, starch concentration, and temperature on the strength of gels. This experiment was completely randomized with sixteen units.
An insurance company insures four large risks. The number of losses for each risk is independent and identically distributed on the points {0, 1, 2} with probabilities 0.7, 0.2, and 0.1, respectively. The size of an individual loss has the followi..
the mean diameter of a ball bearing produced by a certain manufacturer is 0.80 cm with a standard deviation of 0.03 cm.
From 1982 to 2003 the net sales for the J.M Smucker company increased from $157 million to $687 million compute the mean annual percent increase in net sales.
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