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A confidence interval estimate for the population mean is given to be (37.46, 46.39). If the standard deviation is 11.337 and the sample size is 35, answer each of the following (show all work):
A) Determine the maximum error of the estimate, E.
B) Determine the confidence level used for the given confidence interval.
Find the range and the standard deviation of the times.
State the hypotheses for a chi-squared test in the context of this problem. Calculate the expected matrix and describe what it represents. Calculate the test statistic. Describe what this represents and answer the question posed.
An average computer mouse inspector can inspect 50 mice per hour. The 48 computer mice inspectors at a particular factory can only insppect 46 mice per hour with a standard deviation of 10.
According to the study, the mean age of a self-employed individual is 46.6 years with a standard deviation of 10.8 years.
A sample of 46 bars is taken and their mean length is determined to be 51 centimeters with a standard deviation of 3.6 centimeters. Using a .01 significance level, test the retailers claim that the population mean is less than 50 centimeters.
An investigator wants to estimate caffeine consumption in high school students. How many students would be required to ensure that 95% confidence interval estimate for the mean caffeine intake (measured in mg) is within 15 units of the true mean? ..
a) Test whether there is a difference between attitudes in the 2 cities. Use a 95% alpha. b) What does your result say about attitude consistency across cities?
Find the P value or an interval containing the P value for the sample test statistic.
A developmental psychologist is studying memory development in children. He is interested in determining the exact age at which children began to recall long-term episodic memories.
Suppose that you are purchasing cases of wine and that periodically you select a test case to determine the adequacy of the bottles' seals. To do this you randomly select and test 3 bottles int he case.
For an arch chosen at random in Arches National Park, use the preceding information to estimate the probability that the height of the arch poening is:
The random number generator on calculators randomly generates a number between 0 and 1. The random variable X, the number generated, follows a Uniform Probability Distribution. What is the probability of generating a number between 0 and 0.2?
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