23/24 Ch. 1 Test

At the beginning of the school year, a high-school teacher asks every student in her classes to fill out a survey that asks for their age, gender, the number of years they have lived at their current address, their favorite school subject, and whether they plan to go to college after high school.

Which of the following best describes the types of variables that are being measured?

Below is a dotplot of the adult literacy rates in 177 countries in 2008, according to the United Nations.

For example, the lowest literacy rate was 23.6%, in the African country of Burkina Faso.

Based on the shape of this distribution, what numerical measures would best describe it?

Below is a dotplot of the adult literacy rates in 177 countries in 2008, according to the United Nations.

For example, the lowest literacy rate was 23.6%, in the African country of Burkina Faso.

The overall shape of this distribution is

Below is a dotplot of the adult literacy rates in 177 countries in 2008, according to the United Nations.

For example, the lowest literacy rate was 23.6%, in the African country of Burkina Faso.

The mean of this distribution (don't try to find it) is

A survey was conducted by a statistics student, asking 300 high school students 'What is your favorite class: History, English, Spanish, Science or Mathemtatics?'

How should this data be displayed?

Select all the appropriate graphs below:

Answer the following:

a. Which of the following are resistant to outliers?

b. What does this mean?

Select both correct answers.

Which of the distributions below has the larger standard deviation?

The five-number summary of the distribution of scores for an exam in a psychology class last semester was

Mean = 66 SD = 14 min =18 Q1 = 39 Med = 62 Q3 = 76 Max = 100.

Sketch a boxplot using the 5# summary in the 'show your work' area.

What percent of the students had scores below 39?

Check the values for the mean and the median in #9.

How does the mean compare to the median?

What does this tell you about the shape of the distribution?

Select both correct answers.

In a class of 100 students, the grades on a statistics test are summarized in the following frequency table.

Using the fact that there are 100 total students, use the frequencies in the table above to figure out where the median value is.

The median grade is in which of the following intervals?

The back-to-back stem and leaf plot below gives the pulse rates for a group of football players both before and after a running drill.

Write a few (2 or more) sentences comparing the two distributions.

The back-to-back stem and leaf plot below gives the pulse rates for a group of 19 football players both before and after a running drill.

What is the median for the pulse rates after the drill?

Use the dotplot below that shows points scored by 18 students on a Statistics quiz.

What is the percentile for the data value at 45?

Calculate the percent then round to one place past the decimal.

Interpret the percentile from #16.