Straighterline Statistics Final

Straighterline Statistics Final Exam
With Correct Answers

anais is organizing her rock collection and places each rock in one of three categories: small, medium, or
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large. this illustrates what level of measurement?CORRECT ANSWERS✔✔ordinal
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which of the following is an example of a nominal variable?CORRECT ANSWERS✔✔gender
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what sort of data are temperature measurements?CORRECT ANSWERS✔✔ratio
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based on the graph, which statement best describes the relationship between daily high temperatures
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and the number of people going to the beach?CORRECT ANSWERS✔✔it is negative linear relationship
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the table shows the number of train tickets carl purchased to each station over the last month and the
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fare to each station. what was the average cost per ride?CORRECT ANSWERS✔✔$5.45
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the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample variance?CORRECT
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ANSWERS✔✔11.6
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jason collects information about annual family income from each student at his college. he computes
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Jboth the mean and median family income across all students and is surprised to find that the mean
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Jincome is higher than the median income. what is the most likely reason for the difference in the mean
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Jand the median?CORRECT ANSWERS✔✔the mean is more affected by a small number of extreme
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Jvalues

, an instructor administers a test to a class of 30 students and observes that the scores are close to
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normally distributed with a mean score of 40 and a standard deviation of 10. what can you conclude from
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these results?CORRECT ANSWERS✔✔the average student scored at the 40th percentile
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laura's quiz scores during the semester were 87, 82, 90, 92, and 84. what was her mean scoreCORRECT
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JANSWERS✔✔87



the table lists the populations and relative frequencies of car ownership in 4 neighboring cities. which city
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has the most cars?CORRECT ANSWERS✔✔westville
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in the figure shown, sample a and sample b have the sameCORRECT ANSWERS✔✔median
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the contingency table describes the living arrangements of students at a small college. what percentage
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of the students are women who live in off-campus housing?CORRECT ANSWERS✔✔54
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which of these correlation coefficients shows the strongest linear relationship between 2
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variablesCORRECT ANSWERS✔✔-0.31
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what conclusion can be drawn from the graph of average daily temperature and hot beverage
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salesCORRECT ANSWERS✔✔there is a negative correlation between average daily temperature and hot
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beverage sales
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the coefficient of correlation r is a measurement of statistical relationships that areCORRECT ANSWERS✔
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✔linear



a bag contains marbles of different colors (red, yellow, and blue) and different sizes (small and large). the
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probability of picking a blue marble out of the bag is 0.10 and the probability of picking a large marble is
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0.50. what is the probability of picking a large blue marbleCORRECT ANSWERS✔✔0.05
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