WorksheetsAlg) Statistics
Total questions: 45
Worksheet time: 8hrs 30mins
To find the average or mean of a set of numbers, add up all the items and divide by...
2
The minimum
The maximum
The number of items
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?
5, 15, 10, 20, 15, 10, 15
The large group that you want your survey to represent all of is...
population
sample
statistic
survey
The smaller group you survey that is used to represent your larger group is...
population
sample
statistic
survey
A survey of 50 students in the high school revealed that 15 are interested in joining the soccer team.
If the high school has 300 students total, use the survey results to predict how many would be interested in joining the soccer team.
HINT: Use a proportion and set up equal fractions.
90
21
150
255
A survey about alarm types was taken in a town with 4,216 residents. The results are shown in the table. Use these results to estimate the number of residents who have a window alarm.
HINT: Use a proportion and set up equal fractions.
1,223
1,454
688
1,688
A Target survey found that 4 out of 5 customers who entered the store made a purchase. If this store recorded 22,853 purchases last week, estimate the number of customers who entered the store.
HINT: Use a proportion and set up equal fractions.
28,566
18,282
50,784
10,284
Students were surveyed as to their favorite class. The results are shown in the table. If the school the survey was conducted in had 600 students, estimate how many students had math as their favorite class.
HINT: Use a proportion and set up equal fractions.
102
170
352
20
The dot plot shows the results of a survey taken in a town with 700 residents. Estimate the number of residents who took five minutes or less to eat breakfast.
HINT: Use a proportion and set up equal fractions.
403
122
575
315
The stem-and-leaf plot shows the amount of pages in random books from a library with 2,500 books. Use this data to estimate the number of books in this library that have more than 180 pages.
HINT: Use a proportion and set up equal fractions.
682
938
469
1,154
A survey found that 58% of Americans watched the Super Bowl last year. The population of the USA is about 320 million people. Estimate how many people watched the Super Bowl.
HINT: Use a proportion and set up equal fractions.
185.6 million
55.2 million
181.2 million
262.0 million
A small theme park is trying to determine the number of guests they should expect on a weekend, based on the temperature outside. Based on the trend line, about how many guests should be expected if the temperature is around 80°?
10,000
8,000
7,000
9,000
A survey found that about 60% of boys and 40% of girls in a school were interested in playing sports. If this school has 1,300 boys and 1,200 girls, predict the total number of students who are interested in playing sports.
1,260
1,250
1,240
1,270
A survey of Kindergarten students found that 86% of them watch Sesame Street. Could you use the results of this survey to predict how many students in a high school watch Sesame Street? Explain why or why not.
Yes; Both surveys are of students.
Yes, if you knew how many students were in the high school.
No; The populations are not comparable.
No, you don't know the number of students in the high school.
True or False: The sample is a subset (part) of the population.
True
False
A sample in which every person, object, or event has an equal chance of being selected.
Random sample.
Biased sample.
When a sample does not accurately represent the population it is a:
Unbiased sample
Biased sample
A public library asked every 10th person who entered to name the type of book they were getting.
Biased
Unbiased
Carlos wants to know the favorite sport of people at his school so he asks his baseball team.
Biased
Unbiased
A hospital wants to open a gym. They ask the night-shift ER staff when they would use the gym.
Biased
Unbiased
Anna wants to know the average student’s opinion of the tardy policy at her school. Which group of students should she survey in order to achieve the most accurate results?
Thirty randomly selected students from her school
Thirty students who are rarely tardy
Thirty of her friends
The choir director in a high school wants to know how the students in the school feel about singing. If the director selects 100 girls and 100 boys to complete a survey, which method will result in a BIASED sample?
The students will be selected from the choir.
The students will be selected randomly throughout the school.
At a middle school, the 8th graders will conduct a survey for where to go on a field trip.
Which method will result in the least biased decision?
To randomly ask 9th grade students who went on a field trip last year.
To randomly choose some 8th grade students to select a location.
Miss Jones is conducting a survey to find out the favorite snack of all 7th and 8th graders. She will ask a sample of 100 students. Which of the groups below should be surveyed to get the BEST representative sample?
20 students from each of the 5 local middle schools.
The first 100 students who go to a local baseball game
A teacher decides to survey the students in her classes to find out their opinion on the new menu in the cafeteria. Is this biased or unbiased?
Biased
Unbiased
Which random sample is the more likely it is to represent the population of a NHJH accurately?
A. Five students of a school.
B. Five hundred students of a school.
Is the following question biased?
Are stoplights needed at the intersection of Main and Perry Streets?
Not biased/ Unbiased
Biased
Is the following question biased?
Remember biased questions lead people to answer a particular way.
Fewer accidents occur at intersections with stoplights than at intersections that do not have stoplights. Would you be in favor of stoplights at the intersection of Main and Perry Streets?
Not biased/ Unbiased
Biased
