QUESTION 1
A company has developed a wristband for monitoring blood sugar levels without requiring direct blood samples. It is interested in demonstrating the accuracy of the device for governmental approval and has decided to test the claim “The glucose level reported by the wristband is within 10% of a standard blood test result.” Which of the following data collection processes would be appropriate? Select only one answer choice.
Choose a random sample of people from the local area and random times throughout the day and measure their blood sugar using both the wristband and a standard blood test.
QUESTION 2
A farmer divided his piece of land into 4 equivalent groups. The quality of the soil is the same across the 4 groups of land. He planted the same crop in all 4 groups of land and recorded the yield of the crop in all 4 groups for a 4 week period. Is the study observational or experimental? If it is an experiment, what is the controlled factor?
.
QUESTION 3
To test the effectiveness of a drug proposed to relieve symptoms of headache, physicians included participants for a study. They gave the drug to one group and a drug with no therapeutic effect to another group. Which group receives the placebo?
QUESTION 4
Matthew has created a survey to test whether or not gender has any effect on political party associations. What is the explanatory variable in this situation?
QUESTION 5
Is the statement below true or false?
Continuous data are the type of quantitative data that is the result of measuring.
QUESTION 6
A doctor notes her patient’s temperature in degrees Fahrenheit every hour to make sure the patient does not get a fever. What is the level of measurement of the data?
QUESTION 7
Karen wants to estimate the mean number of siblings for each student in her school. She records the number of siblings for each of 200 randomly selected students in the school. What is the sample?
QUESTION 8
True or False? In reference to different sampling methods, systematic sampling includes the steps: divide the population into groups; use simple random sampling to identify a proportionate number of individuals from each group.
QUESTION 9
While standing on a highway overpass, Jennifer wonders what proportion of the vehicles that pass on the highway below are trucks. The highway has 4 lanes running in each direction. Jennifer is only interested in the proportion of vehicles that pass over the course of the hour that she spends there. Which of the following sampling methods would be best for Jennifer to employ?
QUESTION 10
As a member of a marketing team, you have been tasked with determining the number of DVDs that people have rented over the past six months. You sample twenty adults and decide that the best display of data is a frequency table for grouped data. Construct this table using four classes.
15,31,28,19,14,18,28,19,10,19,10,24,14,18,24,27,10,18,16,23
Answer:
QUESTION 11
The values and relative frequencies for a set of data are shown below.
Complete the cumulative relative frequency table.
Answer:
QUESTION 12
The histogram below displays the weights of rainbow trout (in pounds) caught by all visitors at a lake on a Saturday afternoon. According to this histogram, which range of weights (in pounds) contains the lowest frequency?
:
QUESTION 13
Describe the shape of the given histogram.
QUESTION 14
A set of data is summarized by the stem and leaf plot below.
QUESTION 15
The bar graph below shows the number of boys and girls in different classes.
A bar graph has a horizontal axis labeled Classes and a vertical axis labeled Students from 0 to 16 in increments of 2. There are two vertical bars above each horizontal axis label, with the bar on the left representing Boys and the bar on the right representing Girls. The bars have heights as follows, with the horizontal axis label listed first and the bar heights listed second from left to right: Mrs. Brown, 10 and 15; Ms. James, 11 and 12.
How many total students are in Ms. James’s class? Do not include the units in your answer.
QUESTION 16
The line graph shown below represents the number of TVs in a house by square footage (in hundreds of feet). According to the information above, which of the following is an appropriate analysis of square footage and TVs?
QUESTION 17
Ashley is reviewing past monthly credit card statements. The statements are summarized in the relative frequency table below.
What is the cumulative relative frequency of credit card statements that are $1245 or less?
QUESTION 18
The bar graph below shows the number of men and women in different clubs.
A side-by-side bar graph has a horizontal axis labeled Clubs with the classes Drama and Computer and a vertical axis labeled Students from 0 to 16 in increments of 2. Two vertical bars are above each horizontal axis label with the left bar representing Men and the right bar representing Women. The bars have heights as follows, with the horizontal axis label listed first and the bar height listed second: Drama, 11 and 16; Computer, 14 and 14.
How many total students are in the Drama Club?
QUESTION 19
An English professor asks her students who their favorite character is in the novel they are reading. What is the level of measurement of the data?
QUESTION 20
Jessica is keeping track of her favorite stock’s price. The line graph below shows the data.
A line graph titled Stock Price Over Time has a horizontal X-axis labeled Days from 0 to 5 in increments of 1 and a vertical Y-axis labeled Price from 0 to 14 in increments of 2. The graph consists of 6 plotted points connected by line segments from left to right. The coordinates of the plotted points are at left-parenthesis 0 comma 13 right-parenthesis, left-parenthesis 1 comma 3 right-parenthesis, left-parenthesis 2 comma 10 right-parenthesis, left-parenthesis 3 comma 4 right-parenthesis, left-parenthesis 4 comma 14 right-parenthesis, and left-parenthesis 5 comma 12 right-parenthesis.
At what day was the price 10?
QUESTION 21
A set of data is summarized by the stem and leaf plot below.
Stem1234Leaf001122234446677023344455556789912345667789011223333444555799
QUESTION 22
Describe the shape of the given histogram.
QUESTION 23
A data set is summarized in the frequency table below. Using the table, determine the number of occurrences of values greater than or equal to 6.
| Value | Frequency |
| 0 | 7 |
| 1 | 5 |
| 2 | 3 |
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 0 |
| 7 | 9 |
| 8 | 1 |
| 9 | 6 |
| 10 | 4 |
Give your answer as a single number. For example if you found the number of values was 23, you would enter 23.
QUESTION 24
Timothy wants to estimate the mean number of siblings for each student in his school. He records the number of siblings for each of 75 randomly selected students in the school. What is the statistic?
QUESTION 25
In a psychological study aimed at testing a drug that reduces anxiety, the researcher grouped the participants into 2 groups and gave the anxiety-reduction pill to one group and an inert pill to another group. Which group receives the placebo?
Solution:
QUESTION 1
A company has developed a wristband for monitoring blood sugar levels without requiring direct blood samples. It is interested in demonstrating the accuracy of the device for governmental approval and has decided to test the claim “The glucose level reported by the wristband is within 10% of a standard blood test result.” Which of the following data collection processes would be appropriate? Select only one answer choice.
Answer:
Choose a random sample of people from the local area and random times throughout the day and measure their blood sugar using both the wristband and a standard blood test.
QUESTION 2
A farmer divided his piece of land into 4 equivalent groups. The quality of the soil is the same across the 4 groups of land. He planted the same crop in all 4 groups of land and recorded the yield of the crop in all 4 groups for a 4 week period. Is the study observational or experimental? If it is an experiment, what is the controlled factor?
Answer: The study is an observational study……..Click link below to purchase full tutorial at $20