Statistics Unit 3 Test(Whole)

The author surveyed some of the students in one of his statistics classes about the numbers of hours they work per week. What variable is described by the histogram? Is it discrete or continuous?

• The number of hours worked per week; discrete

• The number of hours worked per week; continuous

• The number of students surveyed; discrete

• The number of students surveyed; continuous

Tags

CCSS.HSS.ID.A.1

CCSS.HSS.ID.A.3

How many of the students work between 9 and 25 hours per week?

• 2 students

• 4 students

• 6 students

• 01 students

How many of the students work at least 15 hours per week?

• 1 students

• 2 students

• 5 students

• 10 students

Tags

CCSS.HSS.ID.A.1

What proportion of the students work less than 5 hours per week?

• 10%

• 20%

• 40%

• 80%

The ages (in years) of the remaining 10,997 people stopped by police in New York City in 2012 are described by the relative frequency histogram in Fig. 102. Describe the shape of the distribution. What does it mean in this situation?

• The distribution is uniform, indicating equal frequency across all age groups.

• The distribution is skewed to the right, indicating more younger individuals were stopped.

• The distribution is skewed to the left, indicating more older individuals were stopped.

• The distribution is normal, indicating a bell-shaped curve with most individuals in the middle age range.

Tags

CCSS.HSS.ID.A.3

Estimate the proportion of people stopped by police who were at most 19 years of age.

• 3%

• 20%

• 28%

• 72%

From inspecting the histogram, a student says the proportion of people stopped by police officers who were at 19 years of age is the correct prediction for any year. What would you tell the student?

• Yes, the result is universally applicable.

• No, the result is specific to the data set analyzed.

• It depends on the context of the data.

• The histogram does not provide enough information.

Tags

CCSS.HSS.IC.A.1

Identify which class contains the 50th percentile, which is a measure of the center.

• Age 20-25

• Age 25-30

• Age 30-35

• Age 35-40

• Age 40-45

Tags

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

The 2018 salaries (in millions of dollars) of football players on the Patriots and Rams teams are described by the relative frequency histograms in Fig. 106. Which team had the highest paid player?

• Patriots

• Rams

• Both teams had the same highest salary

• Not enough information

Tags

CCSS.HSS.ID.A.1

CCSS.HSS.ID.A.2

CCSS.HSS.ID.A.3

Describe the shapes of the two distributions. What does this mean in this situation?

• The distributions are both normal, indicating a balanced dataset.

• The distributions are skewed, indicating an imbalance in the dataset.

• One distribution is normal, and the other is skewed, indicating mixed data characteristics.

• The distributions are uniform, indicating equal frequency of all outcomes.

Tags

CCSS.HSS.ID.A.1

CCSS.HSS.ID.A.3

CCSS.HSS.ID.A.4