Stats Chapter 1 Review

You record the age, marital status, and earned income of a sample of 1463 women.  The number and type of variables you have recorded is

• 3 quantitative, 0 categorical
• 4 quantitative, 0 categorical
• 3 quantitative, 1 categorical
• 2 quantitative, 2 categorical

• I and IV
• II and IV
• I and II
• II and III

Earthquake intensities are measured using a device called a seismoraph, which is designed to be most sensitive to earthquakes with intensities between 4.0 and 9.0 on the Richter scale.  Measurements of nine earthquakes gave the following readings:
4.5, L, 5.5, H, 8.7, 8.9, 6.0, H, 5.2
where L indicates the earthquake had an intensity below 4.0 and H indicates the earthquake had an intensity above 9.0.  The median earthquake intensity of the sample is

• 5.75
• 6.0
• 6.47
• 8.7

Tags

CCSS.6.SP.B.5C

• I and II
• I and V
• II and V
• III and V

Tags

CCSS.HSS.ID.A.3

Which of the following is an example of quantitative data?

• Radiation levels in millirems of food in Japan
• Fashionable colors by season of the year
• Gender
• High School Grade level - freshman, sophomore, junior, or senior

• 23.4%
• 40.7%
• 40.5%
• 57.5%

Tags

CCSS.8.SP.A.4

If quartiles Q1 = 20 and Q3 = 30, which of the following must be true?
I.  The median is 25.
The mean is between 20 and 30.
The standard deviation is at most 10.

• I only
• II only
• III only
• None of the above are ture

Tags

CCSS.6.SP.B.5C

Which of the following are true statements?
I.  The value of the sample mean is not sensitive to outliers, but the median's value is.
II.  The sample standard deviation measures how spread out observations are about the mean.
III.  Histograms are more widely used than stem plots or dot plots because histograms display the individual observations.

• I only 
• II only
• III only
• I and II

Tags

CCSS.6.SP.A.3

• Both sets have the same standard deviation.
• Both sets have gaps and clusters.
• Only one of the graphs is symmetric.
• Both sets have the same mean and range.

The five number summary of credit hours for 24 students in a statistics class is:
minimum:  13.0
Q1: 15.0
Median:  16.5
Q3:  18.0
Maximum:  22.0
What statement is true?

• There is no outlier in the data.
• There is at least one low outlier in the data.
• There is at least one high outlier in the data.
• There are both low and high outliers in the data.