Question

1. Assuming age fits a normal distribution (it definitely does not!) with your mean and standard deviation. Note: The answers will seem ridiculous! (a) Draw the normal curve with the usual labels for the 68-95-99.7 rule. (b) 68% of students are between what two ages? (c) 95% of students are between what two ages? (d) 99.7% of students are between what two ages? (e) 50% of students are older than what age? (f) 34% of students are between what two ages? Hint: There are two possible pairs you could give. (g) 2.5% of students are younger than what age? 2. Consider age vs # of credits for part-time students. (a) Draw a scatter plot. Be sure to include a title and labels. (b) Draw your best guess for the regression line through your scatter plot. 3. Consider age vs # of credits for all students. (a) What is the correlation coefficient? Use age as your explanatory variable. (b) What is the regression line? Use age as your explanatory variable. (e) Write a sentence interpreting the correlation coefficient using Statistical vocabulary. (d) Write a sentence interpreting the correlation coefficient in context without using Statistical vocabulary (e) Write a sentence interpreting the slope in context. (f) Based off your equation, if a student is 30 years old, how many credits would you expect them to take? 88ヲ 22 21

Answer 1

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