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Your friend is in a different section of the same subject. She also took a test and the class mean was 70 with a standard deviation of 2.3 points. Both you and your friend scored a 73. Relatively speaking, who performed better on the test, you, with an 86, or your friend? Why?
The best estimator or appreciative of the population proportion is 0.45. How large must the sample be?
Is there significant evidence that this production run doesn't meet specifications? Use a 1% level of significance.
Concept of statistical signi cance
Which of the following models are appropriate to forecast a time series whose amplitude increases over time?
When is it important to have matched pairs rather than two independent sets of data?
The field of statistics can be roughly subdivided into two areas: descriptive statistics and probability.
Utilizing the 5% level of significance was there a significant change in cholesterol level. Elucidate your answer to someone who has never ever taken a course in statistics.
What is the distinction between a one-sided and a two-sided hypothesis test in this problem?
Compute the correlation among the variables. Describe perfect correlation also negative correlation. Utilize the following data to answer questions related.
Determine the mean and standard deviation of the data. What percentage of the data lies within one standard deviation of the mean value?
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
If statistically significant, do you think the difference is large enough to be important?
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