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Scrap rates per thousand (parts whose defects cannot be reworked) are compared for 5 randomly selected days at three plants. Does the data prove a significant difference in mean scrap rates?
ScrapRate
Plant A Plant B Plant C
11.4 11.1 10.2
12.5 14.1 9.5
10.1 16.8 9.0
13.8 13.2 13.3
13.7 14.6 5.9
The mathematics SAT scores of the seven students in a mathematics seminar are 533, 553, 578, 586, 619, 626, and 633. Suppose that the student with the score of 533 drops the seminar and is replaced by a student with a score of 765.
What effect has the transformation had on the lowest exam mark and what effect has the transformation had on the highest exam mark - STATS 201/8 Data Analysis
How large should n be so that a 90% confidence interval for µ has a margin of error and What is the P-value for a test of the hypotheses
Describe the independent variable and the dependent variables?
Probability based on addition rule - Find the probability that a randomly chosen sold automobile from this sample is silver or an SUV?
f x has a normal distribution with mean µ=15 and standard deviation σ= 3, describe the distribution of x values for sample size n, where n = 4, n = 16, and n = 100. How do the x distributions compare for the various sample sizes?
Find a 95% confidence interval for the proportion p of the inner-city, working-class group who eventually became alcoholics.
What type of shape would you expect the histogram of the sample size to have? What value would you estimate for the mean of the histogram of sample means?
Suppose the random variable x is best described by a normal distribution with µ = 24 and σ = 2.7. Find the z-score that corresponds to each of the following x values.
You have to determine that your cutoff value at level a = 0.05 is 1.645 when testing whether the mean of a population is significantly different from 1.5. If you calculate a test statistic of 1.8 what is the proper conclusion?
When combining probabilities, to find the probability of one event AND another event, the separate probabilities should be:
What is the best estimate of the average tread life for the entire population of these tires?
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