TEKS.MATH.9-12.VI.C

The table shows the different types of engineers and the subject they liked most.  What percentage of people surveyed were chemical engineers who preferred math?

• 16.5%
• 33.1%
• 17.6%
• 15.5%

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TEKS.MATH.9-12.VI.C

What is the average rate of change of milk prices between 1976 and 1993?

• 0.06
• 0.05
• 0.04
• 0.03

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TEKS.MATH.9-12.VI.C

Using 5 subintervals, calculate the distance traveled using a left sum.

• 360
• 420
• 396
• 390

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TEKS.MATH.9-12.VI.C

Households consume much more electricity when the weather is warmer. What is the response variable?

• Temperature

• Electricity

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TEKS.MATH.9-12.VI.C

A random sample of the students in two different universities were surveyed for their sleep habits. The results are shown in the table above. Which of the following statements is supported by the information in the table?

• The hours of sleep per night varies more among students at University A than students at University B.

• More students attend University B than University A.

• More than half of the students at University B get 7 hours of sleep per night.

• Half of the students at University A get 6 hours of sleep per night.

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TEKS.MATH.9-12.VI.C

Given the following Scatter Plot, select the option that is most likely the r value.

• $r=-.1$

• $r=-.981$

• $r=.92$

• $r=.765$

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TEKS.MATH.9-12.VI.C

The correlation between the age and height of children is found to be about r = 0.7. Suppose we use the age x of a child to predict the height y of the child. We conclude that

• the least-squares regression line of y on x would have a slope of 0.7.

• the fraction of the variation in heights explained by the least-squares regression line of y on x is 0.49.

• about 70% of the time, age will accurately predict height.

• the fraction of the variation in heights explained by the least-squares regression line of y on x is 0.70.

• the line explains about 49% of the data.

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TEKS.MATH.9-12.VI.C

“Some cell phone users have developed brain cancer. Should all cell phones come with a warning label explaining the danger of using cell phones?”

What kind of bias is evident in this survey question?

• Undercoverage Bias

• Non-Response Bias

• Response Bias

• Voluntary Response Bias

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TEKS.MATH.9-12.VI.C

Which value below could be the correlation of the scatterplot?

• -0.923

• -0.478

• 0.006

• 0.777

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TEKS.MATH.9-12.VI.C

Find the correlation coefficient (round to 3 significant digits)

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TEKS.MATH.9-12.VI.C