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In a study of women and heart disease, the following sample results were obtained: Among 10,239 women with low level of physical activity (less than 200 kcal/wk), there were 101 cases of heart disease. Among 9,877 women with physical activity measured between 200 and 600 kcal/wk, there were 56 cases of heart disease.
A. Construct a 90% confidence interval for the difference between the two proportions.
B. At α = 0.10, is there enough evidence to conclude that physical activity reduces the risk of heart disease?
In a known population of children, aggression is normally distributed with a µ=25, and s=12.
Compare a tabular cum sum chart using standardized values h = 5 and k = 1/2. What is the information you learn.
Which statistics would you use to identify the center and spread of this distribution? Why?- How many parks would you classify as outliers? Explain.
Let X be the number of-days in month picked at random from the 12 months of a year (not a leap year).
determine confidence intervals for each of the followinga. mean 150 s 30 sample size 200 confidence level 95b.
If the vehicles are independent in terms of accident incidence and each has a 0.99999 chance of making it through the year without being in a major accident, what is the probability that the entire fleet will avoid a major accident during the year..
Percentage distributions are useful in comparing two frequency distributions having different total frequencies. Construct percentage distributions from the following two frequency distributions and determine whether the distributions of daily ab..
Using a 1% level of significance, can the hypothesis that the distributions for the student's scores are identical be accepted?
From this data, what is your best point estimate of mean difference between oral and rectal temperatures?- Give a 95% confidence interval for this difference, and state what the interval means.
The probability of getting a big order currently under negotiation is 0.32. The probability of losing money this quarter is 0.54.
first graders who misbehave in school may be more likely to be regular smokers as young adults according to a new study
Consider the MSA marketing research example dis- cussed in Section 3.3 (page 74) of Chapter 3. Use the Sensitivity Report for this LP model.
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