1. The Masters is one of the four major golf tournaments. The figure below is a
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Question
1. The Masters is one of the four major golf tournaments. The figure below is a scatterplot of the scores for the first two rounds of the 2013 Masters for all the golfers entered. Only the 60 golfers with the lowest two-round total advance to the final two rounds (unless several people are tied for 60th place, in which case all those tied for 60th place advance). The plot has a grid pattern because golf scores must be whole numbers.
(a) Read the graph: What was the lowest score in the first round of play?
How many golfers had this low score?
golfers
What were their scores in the second round? (Enter your answers as a comma-separated list.)
(b) Read the graph: Consider the golfer that had the highest score in the second round. What was this score?
2. What was the same golfer's score in the first round? Some studies have suggested that a nightly glass of wine may not only take the edge off a day but also improve health. Is wine good for your health? A study of nearly 1.3 million middle-aged women examined wine consumption and the risk of cancer. The researchers were interested in how risk changed as wine consumption increased. Risk is based on cancer rates in drinkers relative to cancer rates in nondrinkers in the study, with higher values indicating greater risk. In particular, a value greater than 1 indicates a greater cancer rate than that of nondrinkers. Wine intake is the mean wine intake, in grams of alcohol per day (1 glass of wine is approximately 10 grams of alcohol), of all women in the study who drank approximately the same amount of wine per week. Here are the data (for drinkers only).
(a) Make a scatterplot of these data. Based on the scatterplot, do you expect the correlation to be positive or negative? Near ±1 or not?
positive and near 1negative and near 1
(b) Find the correlation r between wine intake and relative risk. (Round your answer to four decimal places.)
r =
(grams per day) 2.5 8.5 16.5 26.0 Relative risk y 1.00 1.14 1.17 1.26 Second-round score 85 65-lT 70 75 80 First-round score
Explanation / Answer
1 a) First round score is in the x axis, Lowest score = 66
How many golfers had this low score? There are 2 golfers with this score
(73, 76) Using the y axis values for the same 2 points found above
b) Second round score is on the y axis. highest score = 85
What was the same golfer's score in the first round? 79, found by drawing line vertically down to the x axis.
Note:Please post the second question separately if it needs to be answered
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