Representative Sample
Is this the sample or population?
Every student who attends your middle school.
Population
Mary surveyed 50 students. 30 of them said Math is their favorite subject. Estimate the number of students that would say Math is their favorite if there are 300 students in her school.
180
Find the mean. Round to the nearest whole number.
68, 73, 76, 76, 83, 83, 86
78%
Students in the _________________ class tended to take longer to complete their math homework.
Second-period class
A theme park wants to know which new ride option is the most appealing to customers. Which sampling method produces an unbiased, representative sample of the population?
A. Survey 100 randomly selected parents in the theme park.
B. Survey the first 250 customers in line for the theme park in August.
C. Survey every 30th customer to enter the theme park.
C
51 out of 60 students prefer cursive elective rather than Health. There are 300 students in the school. Estimate the number who would prefer cursive.
255
Find the interquartile range:
70, 84, 86, 89, 93, 95, 97
11
Looking at the table, which city has shorter commute times and the commute is more predictable?
Murfreesboro
A principal wants to know if students at a middle school are in favor of a new dress code. Which sample of students would be a representative sample?
A. Students selected by the teachers.
B. Students randomly selected from a list of all students at the school.
C. Students sitting at randomly selected tables in the library.
B
Sandy's school has 500 students. Select two predictions that could made about the students in the school. Select 3.....
*Ms. Martin will show you the table.*
A, B, C
Student A: 68, 73, 76, 76, 83, 83, 86
Student B: 70, 84, 86, 89, 93, 95, 97
On average, which student generally scored higher?
Student B
When there is an outlier, what would be the best measure of center.
Mean
Anthony opened a new store and wants to conduct a survey to determine the best store hours. Which is the best representative sample?
A. A group of randomly selected people who come to the store in one week.
B. A group of randomly selected people who visit his website on one night.
C. The first 20 people who walk into his health club one day.
A
There are a total of 500 members at a health club. What is the best estimate of annual members what will visit the health club more than 5 times in the next month. *Round to the nearest whole number.*
*Ms. Martin will show you the table.*
108
Student A: 68, 73, 76, 76, 83, 83, 86
Student B: 70, 84, 86, 89, 93, 95, 97
Which student scores are more consistent, as measured by the range and IQR?
Student A
How many children does Ms. Martin have?
3