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A pharmaceutical manufacturer wants to determine the concentration of a key component of cough medicine that may be used without the drug's causing adverse side effects.
As part of the analysis, a random sample of 45 patients is administered doses of varying concentration (X ), and the severity of side effects (Y ) is measured.
The results include x‾ = 88.9, y‾ = 165.3, SSX = 2,133.9, SSXY = 4,502.53, SSY = 12,500. Find the least-squares estimates of the regression parameters.
Show all the steps of your hypothesis test including a) the claim being tested , b) the null and alternative hypothesis, c) the test statistic, d) the p value, e) initial conclusion, and f) a final conclusion about the original claim.
Refer to the sensitivity report for Problem 14 in Figure 8.19.
Find the regression line with all of these states removed from the calculation. Draw this new line on your plot. Was this group of states inuential?
The restaurant is open 16 hours each day and the daily expenses are 4500. Using a normal approximation, estimate the probability that on a given day, revenue will cover expenses.
A binomial experiment has 10 trials with a probability of success of 0.62 in each trial. What is the standard deviation of the binomial random variable?
A survey of 300 union members in New York reveals that 112 favor the Republican candidate for governor. Construct the 98% confidence interval for the true population proportion of all New York State union members who favor the Republican candidate..
Does the evidence suggest that postpartum women do not get enough sleep? Use =0.05 level of significance. How is the problem set up using the classical and P-value approach?
A sample of n = 25 scores has a mean of M = 40 and a variance of s2 = 100. If this sample is being used to test a null hypothesis stating that m = 43, then what is the tstatistic for the sample?
In this study, what was the independent and dependent variable? Describe the center of each distribution: What is the mean for each group?
The following data show samples of three chain stores in three different locations in one town and the amount of dollars spent per customer per visit. At the 0.05 level, is there a difference among the means?
An accounting professor at a state university in Vermont recently gave a three-question multiple-choice quiz. What is the probability of getting a perfect score if you were forced to guess at each question?
A survey of 100 students at new england college showed the following:7 take english,history and language, 17 take english and history,15 take english and language,18 take history and language, how many students take history but neither of the othe..
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