Data management please help me!

1. The following set of data are the results from the data-management final examination and are to be used to answer the questions from 1 to 4. 46 78 61 65 72 72 54 64 82 88 62 53 65 68 57 64 The following questions are to be answered using pencil and paper. Show your work. Group these data into intervals and create a frequency table bj Produce a frequency diagram and a frequency polygon. 2. Determine the a} three measures of central tendency b ) standard deviation and variance c ) quartile, 1,2,3,4 and the interquartile range Produce a modified box and whiskers plot for this distribution. b) Identify the outliers. 4 Explain which of the three measure of central tendency is most appropriate to describe this distribution of marks and why the other two measures are not appropriate. 5. Describe the type of sample used in each of the following scenarios. A proportionate number of boys and girls are randomly selected from a class. A software company randomly chooses a group of schools In a particular school district to test a new timetable program. A newspaper prints a questionnaire and invites its readers to mail in their responses. dj A telephone survey company uses a random number generator to select which household to call el An Interviewer polls people passing by on the street. 6. A group of & children in a day care centre are to be interviewed about their favorite games. Describe how you would select a systematic sample if there are 52 children at the centre. Identify the bias in the following surveys and explain the effect it could have on their results. Parents of high school students were asked: "Do you think that students should be released from school a half hour early on Friday, free to run around and get into trouble?" Audience members at an investment workshop were asked to raise their hands if they had been late with a bill payment within the last six months