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The director of the campus-computing center did a study to determine the patterns of student computer usage. He found that 15% of the total student computer hours occurred during the first 5 weeks of the term, 25% during the middle five weeks, and 60% during the last 5 weeks. Would a time-series graph of this data be appropriate? Give a reason for your answer.
No. A time-series graph is not ideal for data collected over periods of longer than a week.No. A time-series graph is not ideal for fewer than 10 events or categories of data.Yes. A time-series graph identifies the frequency of events or categories in increasing order of occurrence.Yes. A time-series graph would show how student usage of the computer lab varies during the term.Yes. A time-series graph represents data that make up parts of a whole.
Hypothesis summary on The feasibility of hiring more employees when production increases instead of offering overtime pay to existing employees.
Determine point estimate of population mean? By using 90% confidence, determine the margin of error?
Given that the mean of 100 observations is 42.5 and that their standard deviation is 6.313, find the sum of the squares of the observations.
Our customers expect a call to be completed in 22 minutes. Using the data above, does either of our call centers meet this expectation with an alpha level of 0.05?
What is coefficient of determination? Calculate F statistic. (Hint: You must complete the table to answer the question.)
Sue and Jim approached the machine first. They both said they wanted red gum balls. What is the likelihood they will get their wish?
Should the finite-population correction factor be used? Why or why not?
Estimate the average score at age 35 for all the individuals who scored 115 at age 18. Predict the score at age 35 for an individual who scored 115 at age 18.
Systolic blood pressures are measured at baseline and again 4 weeks later. Compute a 95% confidence interval for the mean difference in blood pressure over 4 weeks.
State the alternate hypothesis for this study? What critical value should be used to determine the rejection region? Use the 1 proportion Z-test.
Assuming the population variances from both offices are equal, is there evidence of a difference in the mean waiting time between the two offices? Use α = 0.05
Don't quite understand the concept of computing confidence intervals. How would confidence intervals determine sampling design and data collection for information gathered.
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