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At the beginning of the course of Statistical Methods I, the instructor recommended that students devote 3 hours per week for the duration of the 13-week semester, for a total of 39 hours. It is known that the time spent on studying statistics follow a normal distribution. Throughout the course duration, students were claiming that they were following the instructor's recommendation. At the course completion, a random sample of 10 students enrolled in the course was drawn where each student was asked how many hours he or she spent doing homework in statistics. The data are listed below:
45
38
37
40
44
46
42
43
Estimate and interpret the p-value of the calculated test statistic.
Using quadratic regression model find the estimated number of planes.
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
One of the major measures of the quality of service provided by any organization is the speed with which responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major ..
Compute an F-statistic for each linear construct and determine its significance. Also, state what questions each of these contrasts address.
Using the .10 level of significance, can we conclude that the assembly time using the new method is faster?
The data below show the average daily high temperature for Chicago, Illinois, for twelve recent spring and summer months. Create a stem-and -leaf diagram for the data.
To determine whether there exists mean difference among the groups:
Assume that the number of left-handers is a binomial random variable. (Refer to the formula for mean and standard deviation for binomial prob. Distribution)
If the sample standard deviation of the sample was $630 also the sample size was 50. Findout the 90% confidence interval of true mean.
Report the t-value, whether you accept or reject Ho, and whether the difference was significant in a brief sentence.
Find out a 95% confidence interval for the proportion p of adults who have a great deal of trust and confidence in the executive branch of government.
Calculate the standard error. With 95% confidence, find out the margin of error?
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