AFTER ENTERING TEST SCORES FROM HER STATISTICS CLASS, THE INSTRUCTOR CALCULATES THE MEAN AND THE MEDIAN AND FINDS THAT THE MEAN IS SIGNIFICANTLY SMALLER THAN THE MEDIAN? WHAT MIGHT THIS IMPLY ABOUT THE SHAPE OF THE DISTRIBUTION OF HER STUDENTS' TEST SCORES?

On Friday night, the owner of Chez Pierre in downtown Chicago noted the amount spent for dinner for 28 four-person tables.  95 103 109 170 114 113 107 124 105 80 104 84 176 115 69 95 134 108 61 160 128 68 95 61 150 52 87 136       Click here for the Excel Data File  (a) Find the mean, median, and mode. (Round your answers to 2 decimal places.)    (b) Are the data symmetric or skewed? If skewed, which direction?  multiple choice Skewed right Skewed left Symmetric

We are asked to find the values that separate the middle 60% of the population from the top and bottom 20%. This means we are looking for the z-scores that correspond to the 20th percentile and the 80th percentile of the population

A car dealership want to estimate the mean age of car in his country. He goes to the largest mall and randomly select 3000 cars in the parking lot and he obtained registration stickers from of the car windows.  He then computes the mean of the age of the sample of 3000 cars.  The sample mean is a good estimate of the population mean because the lager sample compensate the fact that he is using a convenience  sample.  Do this statement make sense and explain?

The mean of the distribution of grades for Exam 1 was 58 , while the median was 70. The distribution of grades is :  A.  Left skewed B.  Right skewed C. Symmetric

How is the goal of descriptive statistics served by putting scores in a frequency distribution?

Answer the questions below. (a) In a survey, a soft drink company asks people to name as many brands of soft drinks as they can.Which measure gives the most frequently mentioned brand?     Mean     Median     Mode     (b) In Prof. Harris's class, the 9 students had the following scores on the last midterm:            127,  128,  130,  132,  133,  134,  135,  140,  189 .Which measure should be used to summarize the data?     Mean     Median     Mode     (c) In a survey, 9 people gave the following ratings for a local politician (on a scale of 0 to 100):            40,  42,  43,  44,  45,  46,  48,  49,  54 .Which measure should be used to summarize the data?     Mean     Median     Mode

Baseball team A of n=7 scores has a mean = 8.  Baseball team B of n=3 scores has a mean = 12.  if the two teams are combined, what is the mean for the combined team?

Compare the mean, median, and mode in terms of their sensitivity to extreme scores

What are the two ways to understand the mean of a data set ? How would you go about giving examples to explain this to someone?