TEKS.MATH.9-12.VI.C.1

Mrs. Moises, the school counselor, keeps a candy jar in her office for students.  During one week, she kept count of how many students came to visit her and the number of candies in the jar, as show in the scatter plot.  Based on the trend line, what is the best prediction for the number of candies in the jar when 30 students visit her?

• 90
• 180
• 135
• 150

Tags

TEKS.MATH.9-12.VI.C.1

Identify the confidence interval used in the figure below if each shaded area is equal to 0.05.

• 90%
• 95%
• 98%
• 99%

Tags

TEKS.MATH.9-12.VI.C.1

The scatterplot shows the average number of hours each of 13 people spends at work every week and the average number of hours each of them spends on recreational activities every week. Based on the scatterplot, what is the best prediction of the average number of hours a person spends at work every week if that person spends an average of 10 hours on recreational activities each week?

• 33 h

• 85 h

• 50 h

• 65 h

Tags

TEKS.MATH.9-12.VI.C.1

A survey explored the relationship between gender and band class. Which is a reasonable conclusion?

• There are more band members than non-band members
• There are more boys in the class than girls
• There are more boys in band than not in band
• More than half of the bands members in the class are girls

Tags

TEKS.MATH.9-12.VI.C.1

Suppose the amount of soda in a can is normally distributed; the mean is 16 oz and standard deviation is 0.4 oz. How much soda is in the heaviest 3% of cans?

• $\approx16.97\ oz$

• $\approx16.75\ oz$

• $\approx16.45\ oz$

• $\approx16.30\ oz$

Tags

TEKS.MATH.9-12.IV.D.1

TEKS.MATH.9-12.VI.C.1

A random sample of 45 life insurance policy holders showed that the average premiums paid on their life insurance policies was $340 per year with a standard deviation of $62. Construct a 95% confidence interval for the population mean. Round to the nearest hundredth

• [321.52, 358.48]

• [238.63, 441.37]

• [253.64, 426.36]

• [328.57, 351.43]

Tags

TEKS.MATH.9-12.VI.C.1

A sample of 121 high school seniors were surveyed on their level of school spirit on a scale of 0-100. The sample mean of this survey is 86. The known population standard deviation is 14 for all seniors in the class. Which of these is a 95% confidence interval for the population mean?

• [82.7, 89.3]

• [83.5, 88.5]

• [83.9, 88.1]

• [85.9, 86.1]

Tags

TEKS.MATH.9-12.IV.D.1

TEKS.MATH.9-12.VI.C.1

The Associated Press found that 730 of 1000 randomly selected adults preferred to watch movies at home rather than at a movie theater. Is there convincing evidence that the majority of adult Americans prefer watching movies at home? State the alternative hypothesis.

• H_a: p = .50, where p is the true proportion of adult Americans who prefer watching movies at home.

• H_a: p < .50, where p is the true proportion of adult Americans who prefer watching movies at home.

• H_a: p > .50, where p is the true proportion of adult Americans who prefer watching movies at home.

Tags

TEKS.MATH.9-12.VI.C.1

If the two batters each hit 10 balls, which batter probably hit the farthest ball and the shortest ball? 

• Batter A
• Batter B
• Both
• Neither

Tags

TEKS.MATH.9-12.VI.C.1

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°?

• 8,300
• 8
• 7,300
• 9,300

Tags

TEKS.MATH.9-12.VI.C.1