1) The correlation for the graph is: a) positive b) negative c) no correlation 2) How many lottery winners between ages 50-69? a) 9 b) 8 c) 5 d) 14 e) 12 f) 13 3) The correlation coefficient for this graph is likely close to: a) r= -.78 b) r= .90 c) r= .25 d) r = -.90 e) r= -. 45 f) r= .50 4) The correlation coefficient for this graph is: a) r = 70 b) r= 4 c) r= 1 d) r = -1 e) r= .91 f) r= -.95 5) The number of eucalyptus trees 0-64 feet tall a) 2 b) 6 c) 8 d) 10 6) A linear model shows the relationship between the temperature and the number of people going swimming. The correlation coefficient is .85. This shows a: a) weak positive relationship b) strong positive relationship c) weak negative relationship d) strong negative relationship 7) More students in Mrs. Rose's class scored between 66.5% and 84% than between 84% and 91% because the box is longer between 66.5% and 84% than between 84% and 91%. a) True b) False 8) From the minimum value on a box-and-whisker plot to the first quartile represents how much of the data. a) 25% b) 50% c) 75% d) 100% 9) From the first quartile to the maximum value on a box-and-whisker plot represents how much of the data? a) 25% b) 50% c) 75% d) 100% 10) The interquartile range represents how much of the data? a) The lower 25% b) The lower 50% c) The lower 75% d) The higher 25% e) The middle 50% f) The higher 50% 11) Which statement is true? a) The plot shows a negative correlation which indicates as hours studied goes up, so do test scores.  b) The plot shows a positive correlation which indicates as test scores go down, hours of study goes up. c) The plot shows a positive correlation which indicates as hours of study goes up, test scores go up. d) The plot shows a negative correlation which indicates as hours of study goes up, test scores go down. 12) What are the range, median, and IQR of the following data set:  10,10,12,14,7,8,10,6 a) range: 8 IQR: 3.5 Median: 10 b) range: 7 IQR: 3.5 Median: 9.5 c) range: 8 IQR: 4 Median: 10 d) range: 6 IQR: 4 Median: 9 13) Factor the following polynomial. a) 2(x-4) 2 b) (2x-4)(2x+4) c) (x-4)(2x+4) d) (2x+4) 2 e) (2x-4) 2 14) Simplify the following polynomial. a) 25x 2 + 10x +1 b) 10x 2 + 10x + 1 c) 25x 2  + 1 d) 10x 2  + 1 15) Simplify the following polynomial. a) 36x 2 + 4 b) 36x 2 + 12x + 4 c) 36x 2 - 24x + 4 d) 12x 2 - 12x + 4 16) Solve the following equation for m. a) b) c) d) 17) Solve the following equation for m. a) b) c) d) 18) Solve the inequality.   3x - 2 < 5x + 2 a) x < -2 b) x > -2 c) x < 2 d) x > 2 19) What is the rate of change of the graph? a) 4 b) 1 c) 1/2 d) 2 20) What is the average rate of change from day 6 to day 8? a) 3 b) -3 c) -6 d) 6 e) 2 f) 4 21) The police department tracked the number of ticket writers and number of tickets issued for the past 8 weeks. The scatter plot shows the results. Based on the scatter plot, which statement is true? a) More ticket writers results in fewer tickets issued. b) There were 50 tickets issued every week. c) When there are 10 ticket writers, there will be 800 tickets issued. d) More ticket writers results in more tickets issued. 22) What is the probability that a male in this survey will like basketball? a) about 15% b) about 27% c) about 40% d) about 31% 23) Given that someone likes football best, what is the probability the respondent was male? a) 69% b) 61% c) 58% d) 64% 24) What percentage of those surveyed were both male and did NOT play video games? a) 47% b) 35% c) 22% d) 12% 25) What percentage of female students played video games? a) 23% b) 35% c) 14% d) 43%

Stats - Algebra 1

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Угради

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