Cole's Unit 3a REDO

What does it indicate when the mean and median values of a dataset are significantly different?

• The data is normally distributed

• The data is skewed

• The data is uniform

• The data is discrete

Tags

CCSS.6.SP.B.5D

CCSS.HSS.ID.A.2

Which of the following Z-score ranges typically represents outliers in a dataset?

• Z < -1.5 or Z > 1.5

• Z < -2 or Z > 2

• Z < -0.5 or Z > 0.5

• Z < -3 or Z > 3

What does the Empirical Rule state about the percentage of data falling within 1 standard deviation of the mean in a normal distribution?

• Approximately 68%

• Exactly 75%

• Around 85%

• Roughly 95%

Tags

CCSS.HSS.ID.A.4

In a histogram, what is represented on the x-axis?

• Class boundaries

• Class limits

• Frequency of each class

• Weighted average

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

If a specific data point is crucial in the dataset, how should its weight be reflected in the calculation of the weighted average?

• Assign a higher weight to that data point

• Assign a lower weight to that data point

• Set the weight of that data point to 0

• Double the weight of all other data points

How does increasing the z-score affect the probability under the normal curve?

• Increases the probability

• Decreases the probability

• Does not affect the probability

• Changes the shape of the curve

2580 Sophomore students at Duke took a Statistics test. The scores were normally distributed with a mean of 70 and a standard deviation of 10. How many of the Statistics students scored 70 or higher?

Tags

CCSS.HSS.ID.A.4

What is the midpoint of the class with the greatest frequency?

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

Using the cumulative frequency graph (an ogive), find the number of people who are 40 or less.

Which of the following is true for the graphs of histograms?

• The bars are separated.

• The class boundaries are on the vertical axis.

• The bars should be the same width.

• The midpoints are used on the horizontal axis.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1