Frequency 8 6+ 4+ 2- 3 5 7 -10 Answer the questions below. (a) Which measures of central tendency do not exist for this data set? Choose all that apply. (b) Suppose that the measurement -8 (the smallest measurement in the data set) were replaced by -42. Which measures of central tendency would be affected by the change? Choose all that apply. (c) Suppose that, starting with the original data set, the largest measurement were removed. Which measures of central tendency would be changed from those of the original data set? Choose all that apply. 5 0 10 20 Annual total return (in percent) 30 3 40 Mean Median Mode All of these measures exist Mean Median Mode None of these measures Mean Median Mode None of these measures

prove that If we multiply the data values by a constant (say, c), value of geometric mean will be affected. how this will affect the geometric mean? Use the equation in image to prove it, and give an example.

what would happen to the mean, median, and mode values that you calculated ,if you added one player to the team whose points per game for the season was 25.  just tell me if the mean, median, and mode would go up, down, or stay the same. Give an example of variable for which  the mean would not be appropriate to describe the data (that is, tell me a circumstance in which you would not want to use the mean to describe a dataset)

QUESTION 7 Given an x-mean3D3.4, SSx-97.3, y-mean33.9, SSy-45.2, Sxy-55.5, and a sample size of 45, calculate the following: X Sample Standard Deviation and Y Sample Standard Deviation X Population Standard Deviation and Y Population Standard Deviation Sample Covariance and Population Covariance Sample Correlation and Population Correlation

The problem below asks you to compare 4 different forecasting methodologies to determine which forecasting model results in the most accurate forecasts.  Accuracy is determined by the lowest mean absolute deviation.   Emergency calls to the 911 system of Greenville County for the past 24 weeks are shown below.  Accurate forecasts are needed to determine the number of operators needed to staff the station.    Week # of Calls 1 50 2 35 3 25 4 40 5 45 6 35 7 20 8 30 9 35 10 20 11 15 12 40 13 55 14 35 15 25 16 55 17 55 18 40 19 35 20 60 21 75 22 50 23 40 24 65     1. EXPONENTIAL SMOOTHING Compute the forecasts using α = .2.  Calculate the MAD for weeks 4 through 24 only. Compute the forecasts using α = .6.  Calculate the MAD for weeks 4 through 24 only.   2. SIMPLE LINEAR REGRESSION Use all of the data, weeks 1 - 24, to calculate the…

d and f only   do not understand how to calculate     Where are the deer? Random samples of square-kilometer plots were taken in different ecological locations of a national park. The deer counts per square kilometer were recorded and are shown in the following table. Mountain Brush Sagebrush Grassland Pinon Juniper 35 17 2 30 53 6 20 19 2 26 19 8 Shall we reject or accept the claim that there is no difference in the mean number of deer per square kilometer in these different ecological locations? Use a 5% level of significance. (a) What is the level of significance? State the null and alternate hypotheses. Ho: μ1 = μ2 = μ3; H1: All three means are different.Ho: μ1 = μ2 = μ3; H1: Exactly two means are equal.    Ho: μ1 = μ2 = μ3; H1: Not all the means are equal.Ho: μ1 = μ2 = μ3; H1: At least two means are equal. (b) Find SSTOT, SSBET, and SSW and check that SSTOT = SSBET + SSW. (Use 3 decimal places.) SSTOT =   SSBET =   SSW =   Find d.f.BET, d.f.W, MSBET,…

Which one of the following summary statistics best matches the data on the abundance of various bird species shown here? Frequency (No. species) 25 20 15 10 5 0 0 Mean = Mean = Mean = 100 200 300 400 500 600 Abundance (No. individuals) 75 individuals, s.d. = 122 individuals 300 individuals, s.d. = 14871 individuals 10 individuals, s.d. = 10 individuals Mean = 10 individuals, s.d. = 14871 individuals Mean 75 individuals, s.d. = 14871 individuals

QUESTION 2 What percent of scores are above an ACT score of 19?