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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).
Choose an article that explains research using one or more statistical tests (z, t, ANOVA, chi square, regression) as part of data analysis. Explain the study using the following information:
If the life of wild pheasants follows a normal distribution with a mean of 9 months and a variance of 9, what percent of the population will be less than 11 months of age?
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An advantage of the permutation test over the t test for a difference in means is that - distribution interval or a bootstrap percentile interval
They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
In the accompanying table, the random variable x represents the number of televisions in a household in a certain country. Determine whether or not the table is probability distribution. If it is a probability distribution, find its mean and stand..
Give all steps of a test of the hypothesis that the corresponding population proportions are equal.
Compute the range and interquartile range
Evaluate the strength of the relationship by computing the coefficient of determination.
The average age of the students in the sample was 23 with a standard deviation of 3.5: a) Formulate the hypotheses for this problem.
Utilizing Excel data analysis calculate t distribution also deduce the result. Study of variance is used to investigate if there is a difference in the mean mileage of the three cars.
According to an IRS study, it takes an average of 330 minutes for taxpayers to prepare, copy, and electronically file a 1040 tax form. A consumer watchdog agency selects a random sample of 40 taxpayers and finds the standard deviation of the time ..
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