Praxis Mathematics - Content Knowledge (5161) Chapter 46 - Interpreting Statistics Quiz Questions

3. How many surveyed would rather watch football or baseball? 112 90 55 98

112

13. Elizabeth wanted to know the gender and the hair color of each of her classmates. She arranged the results of this survey into a two-way table, shown below. According to the table, what is the marginal relative frequency of students in the class that have blonde hair? 17 29.6% 2 2/6 12

29.6%

30. Elizabeth wanted to know the gender and the hair color of each of her classmates. She arranged the results of this survey into a two-way table, shown below. According to the table, what is the conditional relative frequency of students that are boys, given that those students have brown hair? 44% 41.67% 50% 12 5

41.67%

20. How many children and teens eat bananas? 87 84 120 108

87

16. A researcher may pretend to be a subject in a study because: A confederate pretends to be a subject to test a hypothesis. It is a good way to test the study design. A confederate helps increase participation in the study. Researchers should always participate their own study.

A confederate pretends to be a subject to test a hypothesis.

17. Find the population variance of the following data set: 11, 12, 55, 4, 17, 13, 19 Approximately 239 Approximately 18 Approximately 18.71 Approximately 278.9 Approximately 7

Approximately 239

1. The bar graph shows the top five grossing movies from 2015. Which movie made approximately $450 million? Inside Out Jurassic World The Force Awakens Furious 7 Avengers: Age of Ultron

Avengers: Age of Ultron

4. Using the box plot provided, what is the vertical line circled in red? Quartile 1 Interquartile range Extreme minimum Median Quartile 3

Quartile 3

22. What is a graph of ordered pairs showing a relationship between two sets of data? Slope Slope formula Regression line Line Segment Scatterplot

Scatterplot

25. What is a graph of ordered pairs showing a relationship between two sets of data? Univariate data Scatterplot Dependent variable Bivariate data

Scatterplot

9. If an experiment is shown to be statistically significant, then which of the following would be true? The p-value would be negative. The results did not occur by random chance. The results are free of Type I and II error. The p-value would be greater than .05. The results are unique.

The results did not occur by random chance.

29. A scientist is conducting an experiment on mice, seeing how their weight is affected by the volume of cheese they're given. What is the independent variable in this experiment, and why? The volume of cheese is the independent variable, because it's being changed to measure the effect on weight. The weight of the mice is the independent variable, because it's being affected by the volume of cheese. The volume of cheese is the independent variable, because it's being affected by the weight of the mice. The weight of the mice is the independent variable, because it's being changed to measure the volume of cheese.

The volume of cheese is the independent variable, because it's being changed to measure the effect on weight.

19. In the equation y = 4x +15, what does 15 represent? The slope. The regression line. The y-intercept. The slope-intercept.

The y-intercept.

26. If a researcher incorrectly rejects a null hypothesis, it is an example of a _____. Type I Error Type II Error Negative p-value ANOVA t-test

Type I Error

23. A student makes a dot plot to represent the grades their classmates got on the last test, and finds that it makes a shape that is mirrored nearly perfectly across a line at the mean. Is this shape symmetrical? Why or why not? No, it's not symmetrical, because the shape is not mirrored perfectly across a line. Yes, it's symmetrical, because the data clusters at the mean. No, it's not symmetrical, because the data clusters at the mean. Yes, it's symmetrical, because the shape is mirrored nearly perfectly across a line.

Yes, it's symmetrical, because the shape is mirrored nearly perfectly across a line.

6. A dot plot is a visual representation of data using intervals or categories of variables, with each dot representing _____. the frequency of the data an observation in the data a category of the data a variable in the data

an observation in the data

18. Refer to the pie chart showing top fast food chains by 2015 sales. Approximately how much did McDonald's earn, rounding to the nearest billion? $36 billion $85 billion $25 billion $42 billion $55 billion

$36 billion

7. Which one of the following coefficients indicates that the two variables of interest move in opposite directions while remaining within the possible range of correct calculations? -0.83 +0.32 +4.50 -2.78

-0.83

5. Use a ruler or a graphing calculator to find the regression line of the following data set: (2, 3) (4, 6) (5, 1) (2, 4) (1, 3) (6, 3) y = -.14x - 3.79 y = 4x y = -.14x + 3.79 y = -4x + 8 y = .14x + 3.79

y = -.14x + 3.79

2. What is the slope intercept formula? x + y = b + m a² + b² = c² y = mx + b ax² + bx + c = 0

y = mx + b

24. Which one of the following coefficients indicates the strongest relationship between two variables while remaining within the possible range of correct calculations? -2.78 -0.83 +4.50 0.00

-0.83

28. What is the relationship between two sets of variables used to describe or predict information? Correlation Linear regression Regression line Regression analysis

Correlation

8. What is the relationship between two variables or sets of data? Bivariate data Correlation Independent variable Dependent variable

Correlation

12. A condition or piece of data in an experiment that is controlled or influenced by an outside factor is considered what type of variable? Bivariate Correlation Univariate Dependent Independent

Dependent

14. Can you identify this chart? Frequency Table Bar chart Pie Graph Relative Frequency Table Histogram

Frequency Table

27. What is a chart that shows the popularity or mode of a certain type of data? Range Frequency table Interval Cumulative frequency table Pie chart

Frequency table

15. What is a graphical representation of the distribution of data? Range Frequency table Cumulative frequency table Pie chart Histogram

Histogram

11. Which of the following problems could be studied through the use of regression analysis? Which runner on a track team has the fastest average speed Which runner has been on a track team the longest Which runner on a track team has the fastest recorded speed How the speeds of runners on a track team relate to how long they each train

How the speeds of runners on a track team relate to how long they each train

21. Using the box plot provided, what is the rectangle circled in red? Quartile 3 Interquartile range Extreme minimum Quartile 1 Median

Interquartile range

10. What are groups of information that are scaled and separated equally? Ranges Cumulative frequency tables Frequency tables Intervals Pie charts

Intervals