answers 2025
Quiz 1 - CORRECT ANSWER-----
True or False. A study finds that the mean amount spent on produce per visit to a
grocery store by the customers in the sample is $12.84. This is an example of a: -
CORRECT ANSWER-statistic
Imagine that the U.S. federal government had the means to survey all high school
seniors in the U.S. concerning their plans for future education and employment, and
found that 50 percent were planning to attend a 4-year college or university -
CORRECT ANSWER-parameter
A health club is interested in knowing how many times a typical member uses the club
in a week. They decide to ask every tenth customer on a specified day to complete a
short survey including information about how many times they have visited the club in
the past week. What kind of sampling is this? - CORRECT ANSWER-systematic
The manager of a department store decides to measure employee satisfaction by
selecting four departments at random and conducting interviews with all the employees
in those four departments. What type of survey design is this? - CORRECT ANSWER-
cluster
, Which is not a qualitative variable? - CORRECT ANSWER-pulse rate
Number of visits per week is what kind of data? - CORRECT ANSWER-quantitative-
discrete
What type of measurement scale is being used when you measure blood type? -
CORRECT ANSWER-nominal
Which is a continuous variable? - CORRECT ANSWER-Amount of time students
studied for a Biology quiz
What graph is not used for categorical data? - CORRECT ANSWER-histogram
True or False. The relative frequency of a value that occurs 10 times in 100
observations is ten. - CORRECT ANSWER-False
Quiz 2 - CORRECT ANSWER------
The midterm grades on a chemistry exam, graded on a scale of 0 to 100 are below.
Which grade is the outlier in this data? 64, 65, 65, 68, 70, 72,75, 75, 75, 76,78, 78, 81,
83, 84, 98, 100, 100, 120 - CORRECT ANSWER-120
In a class of 35 students, seven students received scores in the 70-79 range. What is
the relative frequency of scores in this range? - CORRECT ANSWER-7/35
You get data from the U.S. Census Bureau on the median household income for your
city. Which chart is the better choice to group and display this data? - CORRECT
ANSWER-histogram
You collect data on the color of cars driven by students in your statistics class, the best
chart to display the data is: - CORRECT ANSWER-bar chart
Your daughter brings home test scores showing that she scored in the 80th percentile in
math and the 76th percentile in reading for her grade. This means that your daughter
scored ________ than 80 percent of the students in her grade on math and
_________than 76 percent of the students in reading. - CORRECT ANSWER-better;
better
You had to wait 90 minutes in the emergency room of a hospital before you could see a
doctor. You learn this wait time was in the 82nd percentile of all wait times. This means
that ______ percent of patients had a shorter wait time than you, and only ______
percent had a longer wait time. - CORRECT ANSWER-82%; 18%
The median hours to complete a 60-minute exam was 40 minutes. You finished in 30
minutes. Your time was _______ than the median indicating that you finished _____
than half of the exam takers. - CORRECT ANSWER-faster; before