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When 12 bolts are tested for hardness, their indexes have a standard deviation of 41.7. Test the claim that the standard deviation of the hardness indexes for all the such bolts is greater than 30.0. Use the 0.025 level of significance.
Why is the F distribution important? How do you determine if a significant difference exists among the groups in ANOVA? How do you determine differences between the groups in ANOVA?
Population standard deviation of 150. If you take a random sample of n = 8 students, what is the probability that the sample mean will be more than 760?
Five digit random numbers (e.g.; 601, 022, 448...), determine the first four elements that will be selected for the simple random sample.
At the .05 significance level, can we conclude that the guideline is still reasonable?
The specification limits are set between 15.8 and 16.2 ounces. a) Compute and interpret the machine's Cp b) Compute and interpret the machine Cpk
The median of 1.50 is a better measure of the center than the mean of 34.83 because of the outlier value of 414 seconds. What is the sample variance and standard deviation for these 30 numbers?
Suppose the following statistics were calculated from data gathered from a randomized block experiment with k = 4 and b = 10:
Find the probability that it has a defective bulb or defective battery, a good bulb or good battery,a good bulb and good battery.
Our sample size is 17. Which value most accurately represents the critical value of Z that you would use to plug in for your interval?
Determine the minimum sample size required in order for you to be confident that your evaluate is within of? Use value for population standard deviation of scores on this subsection.
Given that the student you choose is a senior, find out the probability of selecting a non-senior?
Use the given margin of error, confidence level, and population standard deviation (o) to find the minimum sample size required to estimate an unknown population means (u)
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