Bid Ideas Math Ch. 8 Test Review

Front

Is the sample biased when you survey every fourth student who enters the school to estimate support for extra funding for the history club?

Back

No, because the sample size is large and random.

Front

Is the conclusion that 60% of the students in your school have visited a theater valid based on a survey of 35 students where 21 have visited a theater and 14 have not?

Back

Yes, because 21/35 is 60%. More than half have visited a theater.

Front

Estimate the number of students in your school who prefer rock music based on a sample survey.

Back

200 students

Front

Estimate the mean number of sick days taken by students in your county last year based on a survey of ten students from each of five schools.

Back

4.36 days

Front

You want to know the average weight of a potato from Idaho. Should you survey the population or a sample?

Back

Sample

Front

Does a sample with a 6:10 ratio of students who own a bike to those who do not closely estimate the 60% of students in your school who own a bike?

Back

No, it underestimates

Front

Compare two data sets using measures of center and variation based on a double box-and-whisker plot.

Back

Set A has a greater measure of center and Set B has a greater measure of variation.

Front

Express the difference in the measures of center as a multiple of the measure of variation for two data sets shown in dot plots.

Back

The difference in the means of data set A and data set B is 3 times the MAD.