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- G. Thumb, the leading salesperson for the Moe D. Lawn Landscaping Company, turned in the following summary of sales for the week of October 23–28: Date No. of Clients Oct. 23 13 Oct. 24 8 Oct. 25 10 Oct. 26 15 Oct. 27 10 Oct. 28 22 Find the mean, median, and mode. (If an answer does not exist, enter DNE.) mean clients median clients mode clientsHow do we calculate mean deviation?Discuss its significance and use in variousconcepts of statistics. How it differs fromquartile deviationWaiting 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 Individual Lines 6.4 4.3 6.6 5.5 6.7 5.8 minutes. 6.8 6.3 7.1 6.5 C 7.2 7.8 7.6 7.8 7.8 8.7 The mean waiting time for customers in a single line is The median waiting time for customers in a single line is The mean waiting time for customers in individual lines is minutes. minutes. minutes. The median waiting time for customers in individual lines is Determine whether there is a difference between the two data sets that is not apparent from a comparison of the measures of center. If so, what is it? O A. The times for customers in a single line are much more varied than the times for customers in individual lines. O B. The times for customers in individual lines are much more varied…
- The last digit of the heights of 67 statistics students were obtained as part of an experiment conducted for a class. Use the following frequency distribution to construct a histogram. What can be concluded from the distribution of the digits? Specifically, do the heights appear to be reported or actually measured? Digit Frequency 0 15 5 5 1 T Choose the correct histogram below. O A. O B. O C. D. 18- 56789 0123456789 ܩܫܠ 6789 123456789 Are the data reported or measured? O A. The data appears to be measured. The heights occur with roughly the same frequency. O B. The data appears to be measured. Certain heights occur a ..How does the speed of a runner vary over the course of a marathon (a distance of 42.195 km)? Consider determining both the time to run the first 5 km and the time to run between the 35-km and 40-km points, and then subtracting the former time from the latter time. A positive value of this difference corresponds to a runner slowing down toward the end of the race. The accompanying histogram is based on times of runners who participated in several different Japanese marathons (“Factors AffectingRunners' Marathon Performance,” Chance, Fall, 1993: 24-30). What are some interesting features of this histogram? What is a typical difference value? Roughly what proportion of the runners ran the late distance more quickly than the early distance? Histogram for Exercise 22Differentiate the function. 2x3 y = 7 4x3 dy dx 3. ||
- 1. The following data represent the number of days absent and the final grade for a sample of college students in a general education courses at a large state university. 1 2 3 5 6 7 8 9 # of absences 0 Final Grade 89.2 86.4 83.5 81.1 78.2 73.9 64.3 71.8 65.5 66.2 a. Test whether there is a linear correlation between the number of absences and the final grade, use 0.01 level of significance. Assume requirements satisfied. b. Find the equation of least square regression line. c. Find the best predicted final grade for a student who misses five class periods.A car company wants to know the monthly sales made in ($000), based on the brand of vehicle. The data collected was entered on a MINITAB spreadsheet for analysis. Exhibit II below was subsequently generated. Exhibit 2 Model N Mean Median Tri.Mean Std Dev S.E. Mean Hyundai 23 109 135 107.64 * 1.34 Toyota 27 165 124 143.65 9.5 ** Determine the values of * and **. Give the unbiased point estimate for the average monthly earning from Hyundai Give the unbiased point estimate for the variance of monthly earning from Hyundai Assuming normality, construct and interpret a 90% confidence interval for the average monthly earning from Toyota You are required to test at the 5% level of significance the hypothesis that the average monthly earnings on Hyundai Vehicles is equal to $110,000 versus the alternative that it is different from $110,000.0 100 Frequency 150 200 250 300 350 50 50 The plot below shows in the first panel the distribution of ages across Basketball players at the Olympics. The second shows the distribution of ages across swimmers at the Olympics. Which descriptions below accurately describe the figures. Mark all that apply. Basketball Swimming Frequency 500 1000 1500 15 25 35 45 10 15 20 25 30 35 Age Age 2000 Both distributions exhibit a long-left tail The distribution of ages is relatively similar between basketball players and swimmers, though basketball players are slightly less common at older ages relative to swimmers. There are more swimmers at the Olympics than Basketball players The distribution of ages is relatively similar between basketball players and swimmers, though basketball players are slightly more common at older ages relative to swimmers.
- A manager of a local retail store analyzes the relationship between advertising and sales by reviewing the store's data for the previous six months. The data is found in the table below and in the excel file: store.xlsx Advertising (in $1000s) 50 66 100 74 36 68 61 98 Sales (in $1000s) 81 76 93 71 49 37 65 50 Calculate the average/mean of sales (round to 2 decimal places and keep the answer in the same units presented in the file.)Suppose you apply an estimator to sample data and you get an estimate of 5 forwhatever sample you draw from the population. Is this estimator the most efficient because itsvariance is zero? Why or why not?What statistic does Richard Freeman say that if an economist had predicted it, he/she would have been carted away as mad?