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level: Level 2

Questions and Answers List

level questions: Level 2

Question	Answer
Age is classified as: A. Nominal data B. Ordinal data C. Interval data D. Ratio data	D. Ratio data
Age is classified as: A. Nominal data B. Ordinal data C. Interval data D. Ratio data	D. Ratio data
Age is classified as: A. Nominal data B. Ordinal data C. Interval data D. Ratio data	D. Ratio data
Age is classified as: A. Nominal data B. Ordinal data C. Interval data D. Ratio data	D. Ratio data
You are interested in how stress affects heart rate in humans. Your dependent variable would be the _____. A. Interest B. Heart rate C. Humans D. Stress	B. Heart rate
Gender is categorized as: A. Nominal B. Ordinal C. Interval D. Ratio	A. Nominal
You are conducting a study to see whether a new experimental medication will cause bald men to grow hair. You divide your patients into two groups. To one group, you give the medication. To the other group, you give a placebo. In this study, the correct terms for the taking of the drug and the growth of hair are the following. A. Both the medication and the hair growth are dependent variables. B. Both the medication and the hair growth are independent variables. C. The medication is the dependent variable, and the hair growth is the independent variable. D. The medication is the independent variable, and the hair growth is the dependent variable.	D. The medication is the independent variable, and the hair growth is the dependent variable.
Which of the following definitions is the definition of the MODE? A. The MODE is the value that has the highest frequency. B. The MODE is the average calculated by adding up all the values and dividing by the number of entries. C. The MODE is the largest value. D. The MODE is the value that half of the entries are below and half of the entries are above.	A. The MODE is the value that has the highest frequency.
Which of the following definitions is the definition of the MEAN? A. The MEAN is the largest value. B. The MEAN is the value that half of the entries are below and half of the entries are above. C. The MEAN is the value that has the highest frequency. D. The MEAN is the average calculated by adding up all the values and dividing by the number of entries.	D. The MEAN is the average calculated by adding up all the values and dividing by the number of entries.
Which of the following definitions is the definition of the MEDIAN? A. The MEDIAN is the value that half of the entries are below and half of the entries are above. B. The MEDIAN is the value that has the highest frequency. C. The MEDIAN is the largest value. D. The MEDIAN is the average calculated by adding up all the values and dividing by the number of entries.	A. The MEDIAN is the value that half of the entries are below and half of the entries are above.
What is the median of the following set of numbers? {12,8,13,4,7,6,3,3,15} A. 12 B. 8 C. 7 D. 7.5	D. 7.5
What are the mode and the mean for the following set of numbers? {4, 9, 8, 2, 16, 4, 4, 8 ,9, 6} A. Mean = 7, mode =8 B. Mean = 7, mode =4 C. Mean = 6, mode =8 D. Mean = 8, mode =9	B. Mean = 7, mode = 4
Identify the sampling technique used. Every fifth person boarding a plane is searched thoroughly. A. Stratified B. Systematic C. Cluster D. Convenience E. Random	Correct Answer(s) B. Systematic Explanation A systematic sample is a sample in which each member of the population is assigned a number.
The average of seven observations 7, 9, 12, x, 5, 4, 11 is 9. The value of x is A) 13 B) 14 C) 15 D) 8 A. A B. B C. C D. D	Correct Answer(s) C. C
The arithmetic mean of n natural numbers from 1 to n is ------------- A. n(n+1)/2 B. n(n+1)(2n+1)/6 C. (n+1)/2 D. (2n+1)/2 A. A B. B C. C D. D	Correct Answer(s) C. C
Probability can take values A) -∞ to ∞ B) -∞ to 1 C) -1 to 1 D) 0 to 1 A. A B. B C. C D. D	Correct Answer(s) D. D
The probability of the intersection of two mutually exclusive events is always A) Infinity B) Zero C) One D) None of the above A. A B. B C. C D. D	Correct Answer(s) B. B
Level of significance is the probability of …………. A. Type I error B. Type II error C. No error D. Any of the above A. A B. B C. C D. D	Correct Answer(s) A. A
The outcomes of tossing a coin two times are a variable of type ………….. A. Continuous random variable B. Discrete random variable C Neither discrete nor continuous D. Both (a) & (b) A. A B. B C. C D. D	Correct Answer(s) B. B
Mr. Villalta's Math quizzes are normally scored out of 10 marks. Ann got a 3, 7, 9, 10, 8 in her first five quizzes. What is her mean score A. 3.7 B. 5 C. 7.4 D. 37	Correct Answer(s) C. 7.4
The test scores for a class are 86, 94, 70, 81, 92, 74, 75, 89, 76, and 97. What is the mean of the data set?	Correct answer: m = 83.4 Step-by-step explanation:
Over the last 16 years, the country's unemployment rate has changed according to the following frequency table: years of unemployment: 2 5 2 3 3 1 unemployment rate: 0.5 1 1.5 2 2.5 3 in % (percent). Determine the two-sided confidence interval for the variance DN with a confidence level of 0.95.	Step-by-step explanation: