Straighterline Statistics Final Exam Questions with Detailed Verified Answers

Question: anais is organizing her rock collection and places each rock in one of three categories: small, medium, or large. this illustrates what level of measurement? Ans: ordinal Question: which of the following is an example of a nominal variable? Ans: gender Question: what sort of data are temperature measurements? Ans: ratio Question: based on the graph, which statement best describes the relationship between daily high temperatures and the number of people going to the beach? Ans: it is negative linear relationship Page | 2 Question: the table shows the number of train tickets carl purchased to each station over the last month and the fare to each station. what was the average cost per ride? Ans: $5.45 Question: the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample variance? Ans: 11.6 Question: jason collects information about annual family income from each student at his college. he computes both the mean and median family income across all students and is surprised to find that the mean income is higher than the median income. what is the most likely reason for the difference in the mean and the median? Ans: the mean is more affected by a small number of extreme values Question: an instructor administers a test to a class of 30 students and observes that the scores are close to normally distributed with a mean score of 40 and a standard deviation of 10. what can you conclude from these results? Ans: the average student scored at the 40th percentile Question: laura's quiz scores during the semester were 87, 82, 90, 92, and 84. what was her mean score Page | 3 Ans: 87 Question: the table lists the populations and relative frequencies of car ownership in 4 neighboring cities. which city has the most cars? Ans: westville Question: in the figure shown, sample a and sample b have the same Ans: median Question: the contingency table describes the living arrangements of students at a small college. what percentage of the students are women who live in off-campus housing? Ans: 54