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You wish to compare how a low-fat diet, low-fat diet and a brisk four-mile walk each day, and a low-fat diet and a four-mile job each day affect cholesterol levels. You randomly assign six subjects to each group. The scores in the table below show the reduction in cholesterol count after two months.
Conduct all 6 steps of the appropriate statistic. Be sure to label all six steps.
Calculate and interpret the effect size for this test.
Calculate and interpret any post-hoc test if necessary.
Low-Fat Diet
10, 8, 15, 12, 9, 6
Diet and Walk
14, 12, 18, 16, 13, 17
Diet and Run
19, 15, 14, 16, 18, 20
Assume that female students' heights are normally distributed with a mean given by µ = 64.2 in. and a standard deviation given by σ = 2.6 in.
Which sessions, morning or afternoon, had more stable or uniform attendance over three-day period? Describe by using the suitable calculation for each data set and compare two calculations .
What is the appropriate procedure to test a significant difference in means between the two groups? Use the critical-value method.
Find a 95% confidence interval for the mean amount of money µ spent at the waiter's tables.
If 3 different factor levels show a lot of variation between levels this implies:
The odds in favor of an event are the number of successes divided by the number of failures. The probability of this event occurring is the number of successes divided by the sum of the number of successes and the number of failures.
Which two types of probability sampling are best suited for business research and statistical data analysis, and why?
Medical tests were conducted to learn about drug-resistant tuberculosis. Of 142 cases tested in NJ, 9 were found to be drug-resistant. Of 268 cases tested in Tx, 5 were found to be drug-resistant.
The remainder are defective. If 4 of the products are randomly selected, find the probability that all of them are acceptable.
Use an appropriate 95 percent confidence interval to estimate the difference between the mean prices of the two brands of cd players. Do you think that the difference haspractical importance?
There a flu epidemic that is spreading across SF County. You are a principle and are in charge of 32 teachers. You want to plan ahead and be able to estimate how many substitute teachers the school may need during this epidemic.
A machine is set to fill a small bottlewith 9gram of a medicine. A sample of 8 bottles revealed the following amount (g) in each bottle. At the .01 sig level, can we conclude that the mean weight is less than 9 grams?
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