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Q1) Describe a specific application of statistics that either
1) has a direct effect on you or your life,
OR
2) Useful, or you expect to be useful, in your employment.
Detail how this course has aided you to understand this application better or how you might utilize this application.
To test whether mean amount of air pressure is same for air pumps made by three manufacturers, a party consultant uses 3 pumps to blow up 4 different balloons. Times required to fill balloons are below.
Manufacturer A
Manufacturer B
Manufacturer C
25
28
24
26
29
27
Use data to test whether population means for air pressure for pumps differ for three manufacturers. Use a = 0.10. Show all five steps of hypothesis testing process. Points will be removed for missing parts; though, this may be done using calculator functions.
The average number of hours of sleep per night that a college freshman gets is 6.50 with a standard deviation of 1.80 hours. If 35 college freshmen are randomly chosen find the probability that they average at least seven hours of sleep per night.
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
Let Y be the number of envelopes for which the machine fails to remove a check. Using the Central Limit Theorem to approximate P{Y≤10}.
Explain clearly, in your own words, what is a Type I error in this context.
Do you benefit by using a cum sum chart rather than a control chart?
Assess the model fit for the multiple linear regression model using appropriate statistics and graphics.
Describe the factors that might cause variation in weight of Tootsie Rolls during manufacture.
A company makes camshafts. The camshaft lengths need to be within a certain tolerance or they will not fit. They have produced x bar and s charts
What is the city mileage standard deviation for this SUV model?
Obtain a test statistic and p -value assuming equal variances. Interpret these results.
Compute cumulative probabilities for these numbers in second column. Then create a histogram illustrating data distribution. Using generated Normal probability table, determine probability of Pr(X
Calculate the Pearson correlation for these data also determine whether there is a significant correlation among attitudes for husbands also wives.
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