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The diameter of stabilizing O-Rings washers manaufactured at a large factory is expected to be normally distributed with a mean of 1.30 inches and a standard deviation of 0.04 inches.
What is the probability that a randomly selected washer will have a diameter of,
1) between 1.28 and 1.30 inches
2) between 1.31 and 1.33 inches
If random samples of 16 washers were selected,
3) What proportion of a sample means would be between 1.31 and 1.33 inches?
4) Compare your results in (2) and (3).
Reject H0 at β β = .01; there is evidence of a difference between the mean voter turnouts for urban, suburban, and rural precincts.
Find a 95% confidence interval for the mean daily caloric intake. Interpret this interval.
A student with a 3.5 to 4 grade point average who took standardized test is randomly selected. Determine the probability that students test score is less than 36.
An experiment was carried out to assess the effects of four tomato varieties and four planting densities on yield. There were 64 plots, and each of the 16 factor combinations was randomly assigned to 4 plots.
A nutritionist conducted an experiment on memory for dreams. She wanted to test whether it really was true that eating cheese before going to bed made you have bad dreams. Over three nights, the nutritionist fed people different foods before bed.
Graph a relative frequency histogram for the 500 measurements summarized in the accompanying relative frequency table.
Electronic baseball games manufactured by Tempco Electronics are shipped in lots of 25. Before shipping, a quality control inspector randomly selects a sample of 6 from each lot for testing. If sample contains any defective games, the entire lot i..
Country A and Country C spends about the same amount on average per person per year. Which has the greater spread?
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
Identify each of the random variables as continuous or discrete.
If probability of drawing a face card is 0.625. Determine the probability of not drawing a face card.
Calculated test statistic, decision about the null hypothesis interpretation of results, and a list of references consulted.
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