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Global Temperatures The histograms show the average global temperature per year for two 26-year ranges in degrees Fahrenheit. The
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- If you travel 100 miles in two hours, then your average speed for the trip is Average speed=_________=________arrow_forwardHeart Disease In a certain country, the number of deaths due to heart disease decreased from 235 in one year to 221 in the next year. What percentage decrease in deaths due to heart disease does this represent?arrow_forwardMortgage Rates The following table is taken from the website of Freddie Mac. It shows rates for 30-year fixed-rate mortgages since 1970. y=Year r=Mortgagerate 1975 9.05 1980 13.74 1985 12.43 1990 10.13 1995 7.93 2000 8.05 2005 5.87 2010 4.69 2015 3.84 a. Explain in practical terms the meaning of r(2003). b. Use the table to estimate the value of r(2003).arrow_forward
- Sheena obtains cash from an ATM machine. She suspects that the rate at which she spends the cash is affected by the amount of cash she withdrew at her previous visit to an ATM. To investigate this she deliberately varies the amount she withdraws. She records for her each visit to an ATM, the amount "x"(in $) withdrawn and the number of hours "y" until her next visit to an ATM. Withdrawal 1 2 3 4 5 6 X y 7 8 9 10 40 10 100 110 120 150 2090 80 130 5662 195 33094 27048 196214286 Observe the correlation coefficient value obtained, and comment on the strength of the relationship between the variables.arrow_forwardName Date Period 14. Which equation represents the data shown in the table to the right? -2 -6 А. y = 4x С. y = -4 - x -1 -5 -4 В. y = x- 4 D. y = 4x - 4 1 -3arrow_forwardThe distance (in kilometers) and price (in dollars) for one-way airline tickets from San Francisco to several cities are shown in the accompanying table. Complete parts a through d below. E Click the icon to view the data on airline ticket prices. a. Find the corelation coefficient for these data using a computer or statistical calculator. Use distance as the x-variable and price as the y-variable. (Round to three decimal places as needed.) r= b. Recalculate the correlation coefficient for these data using price as the x-variable and distance as the y-variable. What effect does this have on the correlation coefficient? Select the correct choice below and fill in the answer box to complete your choice. (Round to three decimal places as needed.) Airline Ticket Prices A. The correlation coefficient is r= The correlation coefficient decreases when the order of the variables is changed. B. The correlation coefficient is r= The correlation coefficient remains the same when the order of the…arrow_forward
- Kevin runs a race in his hometown. His buddy…arrow_forwardRunning Shoes. A shoe designer tests a new material for the soles of their most popular line of running shoes. She has 6 athletes run 100 miles with one of last years shoes and one of these new shoes, randomly assigning the new shoe to the left or right foot. Afterward, she measures the amount of wear on each of the shoes in millimeters. Test the claim that the amount of wear with the new material is different from the amount of wear with the old material. Runner 4 1 2 3 1.14 1.04 1.08 1.09 New Material Wear Old Material Wear 1.03 0.87 0.96 1.01 (b) Write the hypotheses in symbols. Ho: Hdiff-new-old = 0 Ha: Hdiff-new-old > 0 O Ho: Pdiff-new-old (a) Why are these paired data? O The top and bottom values in each column are from the same runner. Runners typically run in groups of two. There are an equal number of shoes of each type. This table does not have paired data; there is no clear relationship between the top and bottom values in any column. Each runner has a pair of shoes. -0 Ha:…arrow_forwardHi there, I submitted this question previously and the final answer was incorrect. I just want to know how to do all the steps to get the correct answer. Thank you! The answer that was previously given was a)y=157.3+234.4x b) y=2266.9arrow_forward
- Select the measurement scale in the right column that best matches the description in the left column. Note that each scale (nominal scale, ordinal scale, interval scale, and ratio scale) will be used exactly once. The values of data measured on this scale can be rank ordered. In addition, the differences between two adjacent ranks are equal. The values of data measured on this scale can be a number or a name, but they can be rank ordered. The values of data measured on this scale can be rank ordered and have meaningful differences between scale points. For this scale, there is also an absolute zero point. Data on this scale are measured by determining the category to which they belong.arrow_forwardIllustration 9.7. The mean weight of 150 students in certaid class is 60 kilograms. The mean weight of boys in the class is 70 kg and that of the girls is 55 kg. Find the number of boys and the number of girls in the class.arrow_forwardPlease answer this question. Show work! Use both pictures to answer the question.arrow_forward
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