ECON 250 Midterm: ECON 250 Pastmidterm1 mid Oct 05 ans Prof

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31 Jan 2019
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ECON 250 Full Course Notes
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At the end of the exam are several formulae. Answers are to be written in the examination booklet. Most of the marks are awarded for showing how a calculation is done and not for the actual calculation itself! There are a total of 100 possible marks to be obtained. 5 marks each for a total of 60 marks. Part b has 1 questions worth 40 marks. Part a: do all 12 questions (5 marks each) A random sample of 60 households are drawn from a small district. The following is the frequency distribution of the number of items donated to local food banks in a week of charity events: 6 (a) find the relative frequencies for each of the 6 classes. Cal- culate the sample mean, the sample variance, and the sample standard deviation. The items donated is a random variable and we denote it by x. Use the formula for grouped data, we have:

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