Question

MATH 1532 3.00 w A ssignment 2 Tot al marks 40 Question 1: To determine how the number of housing starts is a ected by mort gage rat es (in peroents), an economist recorded the mortgage rate and the number of housng tarts in a large oounty for the past 10 years The data are list ed below. Rate 5.5 48 46 4.5 5.0 5.4 5.8 5.9 5.5 5.0 Sarts 115 161 185 201 206 167 155 117 133 150 (a) (2 marks). State what are the explanatory and reeponse variables (b) (3 marks). Make a scatterplot of the dat a. (c) (3 marks). Brie y describe the direction, form, and strength of rela- tionship bet ween mortgage rate and number of housing starts (d) (5 marks). Showing your work, nd the equation of the least-squares regression line of the number of housng starts on the mortgage rate (e) (5 marks). Assess the t of the least-squares regression line comput ed (f) (1 mark). By how much would you expect the number of housing starts (g) (3 marks). How many housing starts would you predict for a year in for a 1.0 percent mortgage rate and why might you not trust it? (h) (4 marks). Showing your work, compute the sample correlation coet- and graph it on your scatterplot. in part (d) by making and commenting on the residual plot to change for a one percent increase in the mortgage rate? which the mortgage rate is 5.2 percent? What would your answer be cient r between the mort gage rate and the number of housing starts and interpret the value of r Question 2: Nausea from air sickness a ects some travellers A drug company, wanting to establish the e ectiveness of its motion sickness pill, randomly gives its pill or a look-alike sugar pill (placebo) to 200 travellers Here is a two-way table of the travellers dassi ed by the medication which they received and by the degree of nausea they experienced.

please help, I'm so confused

Answer 1

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