Message Actions Expand All Collapse All ouncements 39 Post(s) in this Thread 21 Unread 0 Unread Replies to Me kboard Collaborate cussions William Clark 5 days ago Participation problem of the week Grades Question 1: ckboard Help For the data 1, 3, 5, 9 , please find a.) sample mean (use right notation for sample mean) , b.) population mean (use right notation for population mean) c.) The population standard deviation , and d.) The sample standard deviation. (Note: For the above question 1, you can do by hand, or by excel using (=average () function for the mean In Excel, =stdev.p () function for population standard deviation, and =stdev.s() function for sample standard deviation), or you can do in SPSS using the Analyze--> Descriptive ---> Explore command. Question 2: Which graphs and charts do we use for Categorical (Qualitative) Variables? How about Quantitative variables? Question 3: Data: 62, 67, 68, 68, 69, 70, 72, 61, 74, 59, 77, 61, 92, 93, 91, 82, 80, 74, 105, 101, 90, 90, 90, 91, 51. a.) Find the Measures of Center or Mean, Median, and Mode (the mode is the number that occurs most frequently) of the data! (Note: For part a, you can find the mean and median in excel ( = average() for the mean and =median() for the median, or if by hand you can use the (N+1)/2 rule). b.) Construct a stem/leaf plot (Must show by hand. Attach file in thread) c.) Construct a histogram of class width= 5 (Must show by hand. Attach file In the thread). d.) What is the shape of the data ? (Hint: Does It look normal, skewed, or is It a shape with two peaks? Explain). Question 4: a.) Find Q1, Q2 (median) , and Q3 of 1, 41, 42, 43, 44, 1211 (Must show by hand with method shown in class) b.) Now find the range and interquartile range (Or Q3 - Q1). c.) Are there any outliers? (Note: Use the Q1- (1.5 X IQR) and Q3 + (1.5 X IQR) rule). d.) Construct a Box Plot (which shows the 5 number summary or minimum number, Q1, Q2 or Median, Q3, and maximum number) Reply Quote Email Author