Here the waiting times, is for 1 patient at a time. We are not testing two populations and neither are we testing the same patient for 2 different times.
Therefore the parameter of interest here is m, the mean of one sample.
The parameter is the mean waiting time of the 100 patients who have been waiting at the GMU health center and who represent the population from which they have been sampled.
GMU Health Center Waiting Time. During the flu season, it is known that the waiting time at...
Repair Shop Charges. Most automobile repair shops now charge according to a schedule that is claimed to be based on average times required for making a repair. This means that instead of determining the actual time to make a repair and multiplying this value by their hourly rate, repair shops determine the cost from a schedule that is calculated from average times. A critic of this policy is examining how closely this schedule adheres to the actual time to complete...
Carpeted Uncarpeted 12.2 7.5 10.8 10.9 12.8 6.7 11.6 6.7 14.6 5.7 14.1 7.3 15.4 7.6 15 6.8 14.6 7 11.5 8.6 16.9 7.7 14.4 8.8 11.2 9.1 13.6 8.9 15.8 8.9 13.6 8.5 16.5 9.9 13.6 6.7 Problem 2: Appropriateness of Inference (again) For the following scenario, answer the following questions. The underlined text is the name of the StatCrunch data set to be used for that part. Please note, do not conduct inference in this problem; just answer...
The IRS claims that the mean wait time for callers during a recent tax filing season was at most 7 minutes. A random sample of 11 callers has a mean wait time of 8.7 minutes and a standard deviation of 2.7 minutes. IS there enough evidence to reject the claim at alpha = 0.10? Notice that the sample size is < 30. That will determine whether you use the t-test or the z-test. State if it is a one-tailed or...
To test the claim that sons are taller than their fathers on average, a researcher randomly selected 13 fathers who have adult male children. She records the height of both the father and son in inches. What is (are) the parameter(s) of interest? Choose one of the following symbols m (the population mean);mD(the mean difference from paired (dependent) data);m1 - m2 (the difference of two independent means) and describe the parameter in context of this question in one sentence. Depending...
Name 5-day 4-day Jeff 2798 2914 Betty 7724 6112 Roger 7505 6177 Ali 838 1102 Sera 4592 3281 Claire 8107 4997 Lida 1228 1695 Perez 8718 6606 Enzo 1097 1063 Greg 8089 6392 Martin 3807 3362 A particular county’s Health Department experimented with a flexible four-day workweek. For a year, the department recorded the mileage driven by 11 field workers on an ordinary five-day workweek. Then, it changed to a flexible four-day workweek and recorded the mileage for another year...
Part 1: Create your own Hypothesis Test and Confidence Interval from 1 sample Using methods from chapter 8, test ONE claim about a population parameter by collecting your own data or using our class survey data. Include your written claim, hypothesis in both symbolic and written form, relevant statistics (such as sample means, proportions etc.), test statistic, p-value (or critical value), conclusion, and interpretation of your conclusion in the context of your claim. Use a 0.05 significance level. You will...
1. A mathematics professor believes that the performance of students taking an elementary calculus course has declined in recent years. The professor decides to reuse a final exam that was first administered 10 years ago. At that time the mean score was 81 with s=10, for the 50 students in the section taught by that professor When given to the current class of 53 students, who observed essentially the same set of lectures, the mean is 75 with s=15. If...
The Striving for Perfection Urgent Care Center feels that its patients wait time is too long. The staff has noticed that increasing numbers of people are waiting longer in the waiting room. The national benchmark performance is 90 minutes or less from the time the customer arrives to the time the customer is treated and discharged. Part I The staff decides to examine the time it takes for all patients to move through their service process on two successive days...
3. Waiting times (in minutes) of customers in a bank where all customers enter a single waiting line and a bank where customers wait in individual lines at three different teller windows are listed below. Find the mean and median for each of the two samples, then compare the two sets of results. Single Line 6.36.3 6.66.6 6.76.7 6.86.8 6.96.9 7.17.1 7.67.6 7.87.8 7.87.8 7.87.8 Individual Lines 4.14.1 5.55.5 6.06.0 6.16.1 6.26.2 7.87.8 7.87.8 8.78.7 9.29.2 10.010.0 The mean waiting...
Part 2 The Striving for Perfection Urgent Care Center feels that its patients wait time is too long. The staff has noticed that increasing numbers of people are waiting longer in the waiting room. The national benchmark performance is 90 minutes or less from the time the customer arrives to the time the customer is treated and discharged. Part II The staff thought that the type of service might have an impact on the time it took for the patient...