Straighterline Statistics Final Exam
Questions & Answers
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? - correct Answer-
ordinal
which of the following is an example of a nominal variable? - correct Answer-gender
what sort of data are temperature measurements? - correct Answer-ratio
based on the graph, which statement best describes the relationship between daily high
temperatures and the number of people going to the beach? - correct Answer-it is
negative linear relationship
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? - correct
Answer-$5.45
the outcomes observes in an experiment are: 2, 8, 3, 10, 4, and 9. what is the sample
variance? - correct Answer-11.6
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? - correct Answer-the
mean is more affected by a small number of extreme values
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? - correct Answer-the average student
scored at the 40th percentile
laura's quiz scores during the semester were 87, 82, 90, 92, and 84. what was her
mean score - correct Answer-87
the table lists the populations and relative frequencies of car ownership in 4 neighboring
cities. which city has the most cars? - correct Answer-westville
in the figure shown, sample a and sample b have the same - correct Answer-median
