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Q 2Question textAn analysis of the final test scores in this class shows that the scores follow the normal distribution. The mean of the distribution is 75, and the standard deviation is 8. The professor wants to award an A to a student whose score is in the highest 10%, which means 90% of the class will have lower grades. What is the cut-off point (or score) for those students who earn an A versus those who earn a B? In other words, what is the lowest grade an A student can earn? Hint: Solve for x.Select one:a. 82.2b. 64.7c. 85.3d. 96.9Q 3Question textIn a normal distribution of measurements having a mean of 500 feet and a standard deviation of 50 feet, what percent of the distribution falls between 490 and 520 feet?Select one:a. 63.26b. 55.65c. 23.47d. 24.32Q 4Question textYou want to compare the cost of a one-bedroom and a two-bedroom apartment in the area. You collect data from 10 advertisements of each type of apartment. Here are the rents for the one-bedroom apartments (in dollars/month):520, 645, 600, 505, 450, 550, 515, 495, 650, 385Here are the rents for the two-bedroom apartments (in dollars/month):605, 510, 580, 650, 675, 675, 750, 500, 495, 675Do two-bedroom apartments rent for significantly more than one-bedroom apartments? What can you conclude? Assume alpha = 0.05.Select the appropriate conclusion:Select one:a. p-value is approximately 0.019; two-bedroom apartments rent for significantly less than one-bedroom apartments.b. p-value is approximately 0.974; two-bedroom apartments rent for significantly more than one-bedroom apartments.c. p-value is approximately 0.026; two-bedroom apartments rent for significantly more than one-bedroom apartments.d. p-value is approximately 2.084; two-bedroom apartments rent for the same as one-bedroom apartments.
What is the correlation coefficient and do the data provide sufficient evidence to conclude that the number of years of study and test score are linearly positively correlated? Use α = 0.01
Describes the theory the researchers explore
A project manager at System Design Corporation
Prepare a single summary table that shows average and standard deviation of current salary for males and females according to their Position within the company.
Select five empirical articles from peer-reviewed journals
Consider the situations and comment on whether the sample results might cause concern about the quality of the process.
What type of analysis was conducted in this study? Was this analysis technique appropriate? Provide a rationale for your answer and how many means are being compared for the pain scores at 12 weeks?
Wiley Publications has determined that out of a sample of 5,826 of its publications for 2012, 4,222 of them had been pirated online in some form. What is the estimate of the population proportion? What is the standard error of this estimate?
this assignment requires a considerable amount of computer work and written comment. you may need to seek guidance from
Calculate the percentage of variance explained for r = 0.53. Is this correlation clinically important and what is the r value listed for the relationship between variables 4 and 9?
A large disaster cleaning company estimates that 30% of the jobs it bids on are finished within the bid time. Looking at a random sample of 8 jobs that it has contracted: calculate the mean number of jobs completed within the bid time. Find the proba..
Find the mean, median, mode, variance and standard deviation for the following nine data values and find the four quartiles and the 20 th and 80 th percentiles for the above data.
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