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Suppose that a histogram is constructed for the frequency table shown below:
30-39 freq
1140-49 freq
2350-59 freq 17
60-69 freq 12
70-89 freq 6
The class 60-69 has twice the frequency of the class 70-89. In the histogram, will the area of the bar for the class 60-69 be twice the area of the bar for the class 70-89? In other words, will areas be proportional to frequencies in this histogram? Explain your thinking. Are there any conditions under which areas are proportional to frequencies in histograms?
A sample of participants took part in a hearing experiment. Among other things, the absolute hearing threshold (in decibels) wasmeasured for each participant. The measurements were as follows:
ten observations were selected from each of 3 populations and an analysis of variance was performed on the data. the
A forecasting model has produced the following forecasts: Calculate the mean absolute deviation (MAD) at the end of April.
Determine the appropriate correlation matrix and use it to predict which variable will enter in the first step of a stepwise regression model.
Compute the Kappa statistic and its standard error reading reproducibility of the diagnosis of dyspnea in this clinic.
For problem, give a 95% confidence interval for the difference in proportion of theaters nationwide where one movie will be preferred over the other.
1. an industrial engineer who is studying the clerical staffing of a physicians group practice must decide whether
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State the reasons for your decision and include an explanation of why you did not follow the recommendations of the stakeholders.
If 200 workers are randomly chosen, what is the probability that at least 120 of them believe that technology has lengthened their workday.
How many will contain the true parameter value? Enter answer with 2 decimal places
A survey of 608 adults showed that 401 of them approved of the way city government was being run. Find a 99% confidence interval for the true proportion of voters who approve the way city government is being run.
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