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Statistics in Nursing:
You are interested in whether the data you have collected provide sufficient evidence to indicate a difference in mean serum uric acid levels between individuals without Down's syndrome and individuals with Down's syndrome. The data consist of serum uric acid readings on 12 individuals with Down's syndrome and 15 individuals without Down's syndrome. The means are 4.5 mg/100 ml for the Down's sample and 3.4 mg/100 ml for the sample of individuals without Down's syndrome. Assume that the two independent samples are drawn from normally distributed populations with variances equal to 1 and 1.5 for the Down's and non-Down's samples, respectively. Do you have sufficient evidence to indicate a difference in uric acid levels? Assume α = 0.05, state the hypothesis that you are testing, show all calculations, provide the p value for the test statistic, and provide the 95% confidence interval for the difference between the two mean
an electrical firm manufactures light bulbs that have a length of life that is approximately normally distributed with
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Find the margin of error for this poll if we want 90% confidence in our estimate of the percent of American adults who do not use e-mail.
The probability of getting a big order currently under negotiation is 0.32. The probability of losing money this quarter is 0.54.
if ho b1 0 is not rejected what is the best estimate for the value of the response variable for any value of the
Conduct a hypothesis test to see if the mean property crime rates for 1960 through 1981 (collectively) are different from the mean property crime rates.
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For a national poll on casino visitation, a survey developed by TNS for Harrah's Entertainment was mailed to 100,000 American adults, of whom 57,205.
Calculate 95 percent and 99 percent confidence intervals for µ. (Round answers to 3 decimal places.) 95 percent confidence intervals for µ is
Is there any evidence that the proportion of women who take a multivitamin is greater than the proportion of men? Use a = 0.005. Write a Solution Trail for this problem.
at a certain gas station 70 of the customers use regular-grade unleaded gas and 30 use higher-grade unleaded gas. it is
Compute the probability for the given frequency distribution.
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