Question: Please answer this question using a TI84 where applicable if possible. Thank you. 18. Dr. Smith is interested to see if the drinking alcohol affects

Please answer this question using a TI84 where applicable if possible. Thank you.

Please answer this question using a TI84 where

18. Dr. Smith is interested to see if the drinking alcohol affects the IQ of a person. To determine this, he takes a sample of some of his patients, gives them an IQ test and asks them how many drinks they have a week (1 drink was equivalent to 1.6 ounces of hard liquor or 12 ounces of beer/wine). Number of IQ Drinks 0 105 1 112 108 104 6 101 7 101 10 98 20 90 (a) Determine which variable is the explanatory variable and which is the response variable. 4 5 (b) Draw a scatter diagram using your calculator. Remember to label your axes. (c) Compute the linear correlation coefficient. Then, comment on the type of relationship that appears to exist. (d) Find and interpret the coefficient of determination. (e) Find the equation for the least squares regression line. (f) Interpret the slope and y-intercept, if appropriate. If it is not appropriate, explain why. (g) Would it be reasonable to predict the IQ of a person who has 50 drinks a week? If it is reasonable, predict the IQ. If it is not reasonable, explain why. (h) Compute the standard error. (i) Test whether a linear relation exists between IQ and the number of drinks at the a = 0.05 level of significance. c) What is the mean IQ for a person who has 18 alcoholic drinks a week? (That is, based off of your hypothesis test, determine if you should use ) or .)

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