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Consider the data with analysis shown in the following computer output:
Level N Mean StDev
A 5 10.700 2.612
B 5 16.800 2.168
C 5 10.800 2.387
Source DF SS MS F P
Groups 2 122.03 61.02 10.63 0.002
Error 12 68.88 5.74
Total 14 190.91
What is the pooled standard deviation? What degrees of freedom are used in doing inferences for these means and differences in means?
Round your answer for the pooled standard deviation to two decimal places.
(a) What is the shape of this sampling distribution? [How do you know?] (b) What is the mean of this sampling distribution? (Give your answer correct to one decimal place.)
Manufacturing and Product Development Eyedrops are used by many people to soothe and relieve irritation and to lubricate their eyes. A manufacturer claims.
De?ne what is meant by a continuous variable and give some examples. De?ne what is meant by a continuous probability distribution.
For the samples summarized below, test the hypothesis at ∞ =.05 that the two variances are equal. Variance Number of data values Sample 1 19 8 Sample 2 9 18
A candy company claims that 21?% of its plain candies are? orange, and a sample of 100 such candies is randomly selected.
Simulation II. You are one space short of winning a child's board game and must roll a 1 on a die to claim victory. You want to know how many rolls.
Weight Watchers leads to more weight loss, on average, if you go to meetings than if you participate online.
1. Fill in the blanks in the following ANOVA table (There are 6 unknown numbers)?
What percentage of the pins will be acceptable to the customer? In order to improve percentage accepted, the production manager and the engineers discussadjusting the population mean and standard deviation of the length of the pins.
Explain how these statistics indicate that lung condition and smoking are not independent.- What's the probability that a randomly selected 60-year-old has this lung condition?
Helen is wondering how to plan for the weekend. She will get a letter from home (with money) with probability 0.05.
1. The data set calcium .txt contains the calcium levels of eleven test sub jects at zero hours and three hours after taking a multi-vitamin containing calcium.
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