Essentials Of Statistics For Business & Economics
9th Edition
ISBN: 9780357045435
Author: David R. Anderson, Dennis J. Sweeney, Thomas A. Williams, Jeffrey D. Camm, James J. Cochran
Publisher: South-Western College Pub
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Textbook Question
Chapter 2, Problem 54SE
Colleges’ Year Founded and Percent Graduated. Refer to the data set in Table 2.18.
- a. Construct a crosstabulation with Year Founded as the row variable and % Graduate as the column variable. Use classes starling with 1600 and ending with 2000 in increments of 50 for Year Founded. For % Graduate, use classes starling with 35% and ending with 100% in increments of 5%.
- b. Compute the row percentages for your crosstabulation in part (a).
- c. Comment on any relationship between the variables.
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The table below shows the number of state-registered automatic weapons and the murder rate for several Northwestern states.
xx11.68.46.73.52.72.62.30.7yy1410.99.976.26.35.74.3
xx = thousands of automatic weaponsyy = murders per 100,000 residents
This data can be modeled by the equation y=0.87x+3.83.y=0.87x+3.83. Use this equation to answer the following;A) How many murders per 100,000 residents can be expected in a state with 8.6 thousand automatic weapons?Answer = Round to 3 decimal places.B) How many murders per 100,000 residents can be expected in a state with 6.6 thousand automatic weapons?Answer = Round to 3 decimal places.
The following table shows retail sales in drug stores in billions of dollars in the U.S. for years since 1995.
Year
Retail Sales
0
85.851
3
108.426
6
141.781
9
169.256
12
202.297
15
222.266
Let � be the retails sales in billions of dollars in � years since 1995. A linear model for the data is �=9.44�+84.182.36912158090100110120130140150160170180190200210220A) Use the above scatter plot to decide whether the line of best fit, fits the data well.
The function is a good model for the data.
The function is not a good model for the data
B) To the nearest billion, estimate the retails sales in the U. S. in 2017. billions of dollars.C) Use the equation to find the year in which retails sales will be $231 billion.
The following table shows retail sales in drug stores in billions of dollars in the U.S. for years since 1995.
Year
Retail Sales
0
85.851
3
108.426
6
141.781
9
169.256
12
202.297
15
222.266
Let yy be the retails sales in billions of dollars in xx years since 1995. A linear model for the data is y=9.44x+84.182y=9.44x+84.182.
B) To the nearest billion, estimate the retails sales in the U. S. in 2013
Use the equation to find the year in which retails sales will be $245 billion.
Chapter 2 Solutions
Essentials Of Statistics For Business & Economics
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- The following observations are for two quantitative variables, x and y. Observation x y 1 28 72 2 17 99 3 52 58 4 79 34 5 37 60 6 71 22 7 37 77 8 27 85 9 64 45 10 53 47 Observation x y 11 13 98 12 84 21 13 59 32 14 17 81 15 70 34 16 47 64 17 35 68 18 62 67 19 30 39 20 43 28 (a) Develop a crosstabulation for the data, with x as the row variable and y as the column variable. For x use classes of 10–29, 30–49, and so on; for y use classes of 40–59, 60–79, and so on. y GrandTotal 20–39 40–59 60–79 80–99 x 10–29 30–49 50–69 70–90 Grand Total (b) Compute the row percentages. (Round your answers to one decimal place.) y GrandTotal 20–39 40–59 60–79 80–99 x 10–29 30–49 50–69 70–90 (c) Compute the column percentages. (Round your answers to one decimal place.) y 20–39 40–59 60–79 80–99 x…arrow_forwardThe table below shows the number of state-registered automatic weapons and the murder rate for several Northwestern states. xx 11.8 8.4 7.2 3.6 2.7 2.7 2.2 0.7 yy 13.8 11.5 10 7.2 6.4 6.1 6.2 4.4 xx = thousands of automatic weaponsyy = murders per 100,000 residents This data can be modeled by the equation y=0.84x+4.06.y=0.84x+4.06. Use this equation to answer the following;A) How many murders per 100,000 residents can be expected in a state with 2.7 thousand automatic weapons?Answer = Round to 3 decimal places.B) How many murders per 100,000 residents can be expected in a state with 4.9 thousand automatic weapons?Answer = Round to 3 decimal places.arrow_forwardThe following table shows retail sales in drug stores in billions of dollars in the U.S. for years since 1995. Year Retail Sales 0 85.851 3 108.426 6 141.781 9 169.256 12 202.297 15 222.266 Let yy be the retails sales in billions of dollars in xx years since 1995. A linear model for the data is y=9.44x+84.182y=9.44x+84.182.To the nearest billion, estimate the retails sales in the U. S. in 2012. _______billions of dollars. Use the equation to find the year in which retails sales will be $246 billion. _________arrow_forward
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