Algebra 1b Unit 5 Exam

What is the relative frequency of white chocolate candies with coconut?

40%

What percent of the students speak primarily Spanish?

44%

Nadia's class took a math test. The median score on the test was 72% and the mean of the test scores was 72%. What does this tell you about the data set?

The data is symmetrical.

https://assets.learnosity.com/organisations/625/asset/media/1026634 Which of the following statements about the data set are true? Select all that apply.

The data is skewed. There is one outlier. The interquartile range is 10.

What is the standard deviation of the data set {6,8,6,11,8,8,9} https://mathway.com https://www.geogebra.org/graphing?lang=en

1.7

https://assets.learnosity.com/organisations/625/asset/media/1026628 What is the interquartile range (IQR) of this data set?

10

What is the interquartile range of the data set {23,30,24,28,27,24,26}?

4

What percent of the sophomores surveyed chose the ability to fly?

51%

A respondent is randomly selected among those who believe that penguins are threatened "a great deal." Approximately what is the probability that this respondent will be female?

62%

Which of the following statements about correlation and causation is true?

Causation implies correlation.

The two data sets shown below are almost identical, except that the 63 from the first data set has been replaced by a 33 in the second data set. Which of the following statements are true? Select two that apply. Data Set 1: 32, 41, 51, 63, 66, 71 Data Set 2: 32, 41, 51, 3, 66, 71

Data Set 1: Median - 57, Mean - 54, Standard Dev. - 15.3, IQR - 25 Data Set 2: Median - 46, Mean - 44, Standard Dev. - 24.9, IQR - 34 Answers: The standard deviation of Data Set 2 is larger than the standard deviation of Data Set 1. The mean of Data Set 2 is exactly 1010 less than the mean of Data Set 1.

Data Set A: https://assets.learnosity.com/organisations/625/asset/media/1026638 Data Set B: https://assets.learnosity.com/organisations/625/asset/media/1026639

Data Set A has a greater median. Data Set B has a greater mean. Data Set B is skewed.

Data Set A: https://assets.learnosity.com/organisations/625/asset/media/1026646 Data Set B: https://assets.learnosity.com/organisations/625/asset/media/1026647

Data Set B is skewed. Data Set A has a greater median than Data Set B.

The "1.5×IQR{}^{\prime\prime}"1.5×IQR{}^{\prime\prime} rule states that a data value is potentially an outlier if its distance below the first quartile or above the third quartile is greater than 1.51.5 times the interquartile range. Which of the following box plots represents a data set with a potential outlier, as identified by the rule?

I guessed sorry https://assets.learnosity.com/organisations/625/asset/media/1026629 https://assets.learnosity.com/organisations/625/asset/media/1026631

Which answer choices correctly describe the points labeled A, B, and C in the box plot? https://assets.learnosity.com/organisations/625/asset/media/1026293

Point B represents the median. Point A represents Q1. Point C represents Q3.

The box plots below show the distributions of the low and high temperatures for a city over a one-month period. https://assets.learnosity.com/organisations/625/asset/media/1026635

The difference between the median high and median low temperatures is 15∘F. The interquartile range for the high temperatures is larger than the interquartile range for the low temperatures.

Children who have lost some baby teeth have better arithmetic skills than children who have not lost any baby teeth. In fact, the more baby teeth a child has lost, the better his/her arithmetic skills tend to be. Which of the following statements is most likely true?

There is a correlation here, and losing baby teeth causes arithmetic skills to improve.

Which data display would be best to use if you want to know if there is a correlation between two variables?

a scatter plot

Niko surveyed a group of students to determine how many of them play a musical instrument. His survey results are found in the following two-way frequency table

blank B: 13 blank A: 15

Which box plot represents the data set {1,3,5,7,9,11}?

https://assets.learnosity.com/organisations/625/asset/media/1026623