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The normal distribution is always bell shaped. The normal distribution is defined in terms of its mean and variance (standard deviation). The weight gain associated with an antidepressant is normally distributed with a mean of 6 lbs and a standard deviation of 3 lbs. What is the probability of weight gain? What is the probability of gaining between 0 and 12 lbs?
suppose you want to test the claim that mu!=3.5 with standard deviation unknown. Given a sample size of n = 40 and a level of significance of alpha=.05, when should you reject H0.
In this problem set you will get some practice performing hypothesis tests for two samples. If you use Statdisk to perform any portion of these analyses, please include the results, label them, and refer to them accordingly in your interpretations..
From Company B, 850 stereos are purchased and 6% are found to be defective. Given that a stereo is defective, find the probability that it came from Company A.
We have been informed that the stock has gone up 20%. What is the probability of a rise or fall in the GDP?
Create a graph with the trendline displayed for each of the three different regressions. What are the least squares regression line equations for each of the three different regressions?
Determine if there is any difference between the pulse rates of smokers and nonsmokers. Compute the p-value of the test. Can you draw any conclusions?
The sat scores attainted by the students in nyc are approximately normally distributed with a mean of 500 and a standard deviation of 80. Find the percentage of students who score less than 700.
Assuming the weight of cereal is normally distributed, determine the likelihood that a package will contain more that 12.2 ounces?
Based on this information, by what factor does the risk of having an accident increase due to driving while intoxicated?
Determine the probability of receiving at most three calls in a five-minute interval of time. Determine the probability of receiving exactly 10 calls in 15 minutes.
Is the sample size large enough to construct a valid confidence interval for the proportion of debit cardholders who have used their card in making purchases over the Internet?
What is the treatment mean square? What is the mean square error? How many groups are included in the study?
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