What statistical question could Ted have asked to gather his data?
What is the most popular subject for students in the eighth grade?
Did Ted collect categorical or numerical data? How do you know?
Categorical. The responses he collected have no numerical significance.
How many students did Ted survey? How do you know?
34 students. That’s the total from the responses he gathered.
How can you calculate the relative frequency of students who like science?
Divide the number of students who like science by the total number of students who were surveyed.
As a percent, what is the relative frequency of students who like science? How do you know? Round to the nearest hundredth.
The relative frequency is 24%. Because
How could Ted use his data to figure out how many students in the school might prefer music?
Answers vary; encourage students to discuss finding the relative frequency from the table and multiplying that by the total number of students in the school.
If there are 230 students in the school, how many students could Ted expect to prefer music? How do you know? Round your answer to the nearest whole number.
Approximately 68 students.
Look at part 2. What kind of data is being measured: univariate or bivariate? How do you know?
Bivariate. 2 variables are being measured.
Is there an association between x and y? If so, what kind? Explain your reasoning.
Yes. It is linear. Possible explanation: The data roughly forms a line.
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