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The amount of soda contained in a can for a certain brand of soda is normally distributed with a population standard deviation of 0.1 ounces. A random sample of 40 cans of soda was selected and the amount of soda in each can was measured. The sample mean was 12.03 ounces and the sample standard deviation was 0.08 ounces.
What is the appropriate distribution to use when calculating a confidence interval for the true mean amount of soda contained in all cans of this brand?
In each case, explain whether a control group was used and whether a placebo treatment was used.- Explain whether each of the following experiments was single-blind, double-blind, or neither.
Sample mean is $43000 for a sample of n = 100 construct a 90% confidence interval that her estimate is correct. Interpret the answer in the context of the problem.
What is the probability that the sample will have between 50% and 60% of the identifications correct? What is the probability that the sample percentage of correct identifications is greater than 65%?
1. one box contains six red balls and four green balls and a second box contains seven red balls and three green balls.
Since it is desirable to amplify the 1000-Hz component in the process, arrange to provide an overall gain of 100 as well. The op amps available are ideal except that their output voltage swing is limited to ±10 V.
An English professor would like to test the relationship between an English grade and the number of hours per week a student reads. A survey of 500 students resulted in the following frequency distribution.
Because of the popularity of movies as an entertainment medium for adolescents, an entrepreneur plans to do national study of the average cost of a movie ticket
Let the random variable X be the total number of days for both packages to arrive. Construct the probability distribution for X
On his return he is equally likely to enter, and leave his running shoes, either by the front or back door. If he owns a total of k pairs of running shoes, what proportion of the time does he run barefooted?
No pressure was used for the controls, and their bleeding time was found to have a mean of 1.524 minutes and a standard deviation of .614 min.
Compute confidence intervals for the onesample z test, the one-sample t test, the two-independent-sample t test, and the related-samples t test.
Use column percentages, the maximum difference, and measures of association to describe the strength and direction of the association between the type.
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