Probability and Normal Distributions in Statistics MCQ
Probability and Normal Distributions in Statistics MCQ
1. ___________ would probably be distributed using an intensive strategy.
Answer
Correct Answer:
Popular magazines.
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2. A binomial probability distribution is the distribution of random outcomes for binomial variables such as a coin toss.
Answer
Correct Answer:
True
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3. A researcher selected data that were normally distributed and appropriately concluded that about 95% of scores occurred between two standard deviations below and above the mean.
Answer
Correct Answer:
True
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4. A z score for the mean in a normal distribution is always equal to 1.
Answer
Correct Answer:
False
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5. All z scores above and below the mean are positive.
Answer
Correct Answer:
False
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6. All z scores above and below the mean are positive.
Answer
Correct Answer:
False
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7. In a normal distribution, the mean can take on positive or negative values.
Answer
Correct Answer:
True
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8. A researcher wants to know the probability of earning an A in a chemistry class from a population where 8% of students typically earn an If the researcher selects a sample of 400 students, then what is the mean number of students expected to be on the honor roll? Hint: This is a binomial distribution where p = 0.08 and q = 0.92.
Answer
Correct Answer:
32
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9. Which of the following is not an appropriate step for the normal approximation of the binomial distribution?
Answer
Correct Answer:
Convert raw scores to z scores using SPSS
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10. A researcher found that a group of rats took 18 ± 2 min (M ± SD) to learn a route to find a rewar How long did it take for 80% of the rats to learn the route?
Answer
Correct Answer:
19.68 min
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11. What is the z score for scores in the lowest 2.5%?
Answer
Correct Answer:
−1.96
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12. Of these, the largest proportion in a z distribution could be:
Answer
Correct Answer:
The proportion of area that lies between z = +1 and z = −1.
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13. Scores on a board game were: 23 3.1 (M SD) points. Assuming these data are normally distributed, what is the probability that a competing team got 20 points or less?
Answer
Correct Answer:
.1660
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14. Scores close to the mean are located in the ________ of a normal distribution.
Answer
Correct Answer:
Body
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15. All of the following are true about normal distributions, except:
Answer
Correct Answer:
The distribution is asymmetrical.
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16. A formula used to convert any normal distribution with any mean and any variance to a standard normal distribution with a mean equal to 0 and a standard deviation equal to 1 is known as_____
Answer
Correct Answer:
Both a and b
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17. Z Table is a type of _____ distribution table displaying a list of z score.
Answer
Correct Answer:
Probability
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18. Z Score is a value on the _____ of a standard normal distribution.
Answer
Correct Answer:
X-axis
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19. Z Distribution is any formula used to convert any _____ distribution with any mean and any variance to a standard normal distribution with a mean equal to 0 and a standard deviation equal to 1.
Answer
Correct Answer:
Normal
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20. A type of probability distribution table displaying a list of z scores and the corresponding probabilities (or proportions of area) associated with each z score listed is known as_____
Answer
Correct Answer:
Unit Normal Table
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21. A formula used to convert any normal distribution with any mean and any variance to a standard normal distribution with a mean equal to 0 and a standard deviation equal to 1 is known as_____
Answer
Correct Answer:
Both a and c
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22. Standard Normal Distribution is a normal distribution with a mean equal to 0 and a standard deviation equal to _____
Answer
Correct Answer:
1.0
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23. The Real Limits for a binomial outcome, x, are_____
Answer
Correct Answer:
± 0.5
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24. A theoretical distribution with data that are symmetrically distributed around the mean, median, and mode is known as_____
Answer
Correct Answer:
All of these
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25. A theoretical distribution with data that are symmetrically distributed around the mean, median, and mode is known as_____
Answer
Correct Answer:
All of these
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26. A theoretical distribution with data that are symmetrically distributed around the mean, median, and mode is known as_____
Answer
Correct Answer:
All of these
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27. The distribution of probabilities for each outcome of a bivariate random variable is known as _____
Answer
Correct Answer:
Binomial Probability Distribution
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28. The distribution of probabilities for each outcome of a bivariate random variable is known as _____
Answer
Correct Answer:
Binomial Probability Distribution
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29. Binomial Distribution is the distribution of probabilities for each outcome of a bivariate random variable.
Answer
Correct Answer:
True
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30. Bell Shaped Distribution is a theoretical distribution with data that are symmetrically distributed around_____
Answer
Correct Answer:
All of these
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Statistics (Social And Behavioral Sciences) MCQs | Topic-wise
