panmath7.files.wordpress.com · web viewa college student, ... which conclusion can be drawn from...

Name:___________________________________________________ Date: _________________ Section:____________________


PRE-ASSESSMENT Statistic and Probability

1. A survey was given to a random sample of students attending college in which they were asked, “Asa college student, do you feel like your high school prepared you for your college experience?”The data showed that 54% of the 600 students surveyed replied yes.

What is the population of the statistical question?

a. All students attending college

b. All students in high school and college

c. The 600 students who were surveyed

d. The 54% of students who replied yes

2. A bowling team participates in a two-day tournament and records the scores for each team onboth days. The scores for both days are represented by the box plots below.

Which conclusion can be drawn from the box plots?

a. The scores on Friday and the scores on Saturday have the same median and interquartile range.

b. The scores on Friday have a greater median and a greater interquartile range than the scores on Saturday.

c. The scores on Friday have a greater interquartile range than the scores on Saturday, but both data sets have the same median.

d. The scores on Friday have a greater median than the scores on Saturday, but both data sets have the same interquartile range.



3. Malika and Adrian prepared containers of potato salad at a deli. Each container was supposed tohave a mass of one pound. The manager selected a random sample of containers prepared by eachemployee to check the mass of each container. The results are shown in the table below.

Which inference is best supported by these data?

a. Malika will produce more containers with a mass of exactly one pound than Adrian will.

b. Adrian will produce more containers with a mass of exactly one pound than Malika will.

c. Most of Malika’s containers will have a mass closer to one pound than most of Adrian’s containers.

d. Most of Adrian’s containers will have a mass closer to one pound than most of Malika’s containers.



4. The dot plot below shows Brian’s most recent math quiz scores.

The mean of Brian’s quiz scores is 82 and the MAD of his scores is 12.

Alex is another student in Brian’s math class. Alex’s mean score of the same quizzes is also 82, butthe MAD of Alex’s scores is 2.

Describe how Alex’s math quiz scores are different from Brian’s math quiz scores.



5. A large company has offices in cities across the country. The facilities director of the company wasasked to survey employees about their office furniture. Rather than survey all employees in thecompany, the director decided to take a sample of employees. Which groups would be mostrepresentative of the opinions of all employees in the company?

Select each correct answer.a. Employees with office phone numbers ending in 3 or 7 (assume every employee has an officephone)b. Randomly selected employees in the cafeteria of one of the officesc. Employees who have worked for the company for more than 10 yearsd. 5% of randomly selected employees from each office locatione. Employees answering phone calls in the company’s customer service departmentf. Employees who are randomly selected by a computer from a list of all company employees



6. Gabrielle surveyed a random sample of 40 students in her school’s cafeteria about whether they ate the cafeteria’s tomato soup.

14 of the sampled students said they ate the tomato soup A total of 840 students eat in the cafeteria each day

Part A:Based on the results of Gabrielle’s survey, how many of the 840 students who eat in the cafeteriacan be expected to eat the tomato soup?

Part B:Two other students, Isaiah and Kaylee, also surveyed random samples of 40 students in theschool’s cafeteria about the tomato soup. The results of all three surveys are shown in the table.

Based on the results of the three surveys, what percentage of the 840 students who eat in thecafeteria each day can be expected to eat the tomato soup?

a. 4% – 10%b. 10% – 14%c. 25% – 35%d. 35% – 59%



7. Students at a school are collecting canned goods for a food drive. The principal asked a randomsample of 10 students how many cans they are planning to bring for the food drive. Their responsesare shown in this box.

There are 250 students in the school. If the sample is representative of the school population, whatis the total number of cans the students can expect to collect?



8. Liz and Sara ride their bikes every day. The table shows the number of miles Liz and Sara rode theirbikes during five randomly selected days.

Based on the data in the table, which is the best comparative statement about the number of mileseach girl rides on a typical day?

a. On a typical day, Liz rides farther than Sara because the mean of Liz’s data is greater than the mean of Sara’s data.

b. On a typical day, Sara rides farther than Liz because the mean of Sara’s data is greater than the mean of Liz’s data.

c. On a typical day, Liz rides farther than Sara because the range of Liz’s data is greater than the range of Sara’s data.

d. On a typical day, Sara rides farther than Liz because the range of Sara’s data is greater than the range of Liz’s data.



9. A local library is interested in starting a story time hour for kids in the summer. The library isconsidering three different days on which to hold the story time: Saturday, Sunday, or Wednesday.The library surveys a random sample of 10 parents from the neighborhood to ask them which daythey prefer. The results are shown below.

Part A:What is the sample proportion of parents who prefer Saturday?

The library repeats its survey of a random sample of 10 parents several more times to ensure it hasaccurate results. The dot plot below shows the distribution of sample proportions of parents whoprefer Saturday.

Part B:Estimate the population proportion of parents who prefer Saturday.

Part C:Based on the information from the surveys, should the library hold the story time hour onSaturday? Explain your reasoning.



10. An electronic sign that shows the speed of motorists was installed on a road. The line plots belowshow the speeds of some motorists before and after the sign was installed.

Part A:Which statement is best supported by the data?

a. All motorists decreased their speed after the sign was installed.

b. Most motorists increased their speed after the sign was installed.

c. The median speed of motorists decreased after the sign was installed.

d. There was no change to the speeds of motorists after the sign was installed.

Part B:The table below shows the mean speed and the mean absolute deviation or MAD of the sample ofmotorists before and after the sign was installed.

Does there appear to be a meaningful difference between the speeds of motorists before and afterthe sign was installed? Explain your reasoning and use data to support your answer.

panmath7.files.wordpress.com · web viewa college student, ... which conclusion can be drawn from...

Documents