# DSST Principles of Statistics: Study Guide & Test Prep Final Exam

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Exam Progress:

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#### Question 1 1. What do we call a chart that shows the popularity or mode of a certain type of data and the likelihood that a given event will fall below the frequency distribution?

#### Question 2 2. When you find a relationship in bivariate data, you are looking at a positive or a negative _____.

#### Question 3 3. Using the box plot provided, what is the rectangle circled in red?

#### Question 4 4. 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?

#### Question 5 5. How many adults picked chocolate or vanilla?

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#### Question 6 6. _____ is a sampling method where different groups within a population are used as a sample.

#### Question 7 7. When members belong to multiple groups in the population this is called _____. Cluster sampling _____ have this.

#### Question 8 8. To use systematic random sampling, you must first create a list of your population, and then:

#### Question 9 9. Which of the following conditions must be met for a sample to be a stratified random sample?

#### Question 10 10. Samantha is using convenience sampling to conduct her research. After collecting the data, she runs into a few issues associated with the limitations of convenience sampling. What are these limitations likely to be?

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#### Question 11 11. Power, in terms of parametric and non-parametric methods, is the probability of:

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Question 12
12.
Examples of non-parametric methods include:

I. Wilcoxon signed-rank test

II. Kruskal Wallis test

III. t-test

####
Question 13
13.
The Wilcoxon signed-rank test assumes:

I. Normal distribution

II. Symmetry

III. A specific shape

####
Question 14
14.
Which of these is NOT a parameter?

I. Population mean

II. Population standard deviation

III. Sample mean

#### Question 15 15. Descriptive measures of population data are called:

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#### Question 16 16. _____ of normally distributed data is always contained within 1 standard deviation of the mean.

#### Question 17 17. The tail lengths of a certain animal are normally distributed with a mean length of 1.5 feet and a standard deviation of 3 inches. What percentage of these animals have a tail that is at most one foot long?

#### Question 18 18. What do two-sided problems involve?

#### Question 19 19. A statistician has figured out the percentage of the area under a normal curve that meets certain criteria. How would they apply this knowledge to a given sample?

#### Question 20 20. In a certain video game you wish to be in the top 0.15% of the scores. Assuming that the scores are normally distributed with a mean score of 25,460 and a standard deviation of 570, what is the score you need to achieve?

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#### Question 21 21. What are the characteristics of a sample used to infer information about the population?

#### Question 22 22. How do descriptive and inferential statistics differ?

#### Question 23 23. Variables are collected in the form of data. What are the two major forms of data?

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Question 24
24.
Katie is collecting data about the number of people that are interested in different dance styles. After passing out a survey, she has gathered the following information:

Style / Number of people interested in this style

Ballet / 20

Jazz /12

Hip Hop / 8

Lyrical / 26

Tap / 10

What type of data did Katie collect?

#### Question 25 25. What do we call the characteristics of a sample used to infer information about the population?

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#### Question 26 26. What transformation doesn't work for data sets that only contain positive values?

#### Question 27 27. What does normality mean in analyzing residuals?

#### Question 28 28. Examine the list of correlation coefficients below. Which coefficient indicates that the two variables of interest move in opposite directions, and is within the possible range of correct calculations?

#### Question 29 29. Find the correlation coefficient between the two values. Is there a positive or negative correlation?

#### Question 30 30. What is a graph of ordered pairs showing a relationship between two sets of data?

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Question 31
31.
Find the variance for the following data set:

101, 106, 125, 142, 78, and 109

#### Question 32 32. In the linear transformation formula, what does x represent?

#### Question 33 33. During the first four Summer Olympic games attended by the United States, these medal counts were awarded. Calculate the mean number of medals that the United States won during these Olympic Games.

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Question 34
34.
Find the sample variance of the following data set:

2, 3, 4, 7, 10, 1, 2

#### Question 35 35. What is the sum of the numbers in a data set divided by the total number of values in the data set?

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#### Question 36 36. When one event affects the outcome of another event, we call them:

#### Question 37 37. What variable represents the probability of success on an individual trial?

#### Question 38 38. Solve 8!.

#### Question 39 39. Suppose you toss three coins. What is the probability that you get two heads and one tail if the order in which you get them does not matter?

#### Question 40 40. A locker combination contains four numbers between 1 and 20 and none of the numbers can be repeated. What is the probability that the locker combination will consist of all even numbers?

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#### Question 41 41. The probability of selecting a green ball from a bag is 1 out of 8. If you select 3 balls, what is the probability of at least one of them being green?

#### Question 42 42. Gary has a deck of 52 cards. He wants to know the probability of drawing the jack of spades and then drawing the two of hearts from the deck without replacing either card. What's the probability of this event?

#### Question 43 43. The letters that spell out the state CALIFORNIA are cut and placed in a bag. What is the probability that the 3rd letter selected will be a C if the first two letters selected were both I's?

####
Question 44
44.
Kyle works at a local music store. The store receives a shipment of new CDs in a box. In the shipment, there are 10 country CDs, 5 rock CDs, 12 hip hop CDs, and and 3 jazz CDs.

What is the probability that the first CD Kyle chooses from the box will be country?

#### Question 45 45. Karen takes her group of third grade students out for ice cream. There is a total of 30 students. 13 of the students enjoy chocolate ice cream, 12 of the students enjoy strawberry ice cream, and 5 students enjoy vanilla ice cream. When asked which two ice creams are their favorite, 8 students said they enjoy chocolate and strawberry ice cream. Out of the 30 students, what is the probability of a student enjoying chocolate or strawberry?

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#### Question 46 46. Justin is conducting an experiment. He wants to know which type of pet is most preferred among 2nd graders. He asks them if they prefer dogs, cats, or hamsters. Is this a binomial experiment?

#### Question 47 47. Jeanette asks 50 students in her math class if they are comfortable using technology. Thirty-eight say they are comfortable using technology. Calculate the theoretical and actual probability of this scenario.

#### Question 48 48. Which of the following is TRUE regarding the expected value associated with the probability density function?

#### Question 49 49. A student wants to compute the expected value of a continuous probability distribution describing the heights of a population of bears. Which of the following would she use?

#### Question 50 50. A statistician consults a continuous probability distribution, and is curious about the probability of obtaining a particular outcome a. Which of the following is definitely true of the value of P(X=a)?

#### DSST Principles of Statistics: Study Guide & Test Prep Final Exam Instructions

Choose your answers to the questions and click 'Next' to see the next question. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. You will lose your work if you close or refresh this page. Good luck!