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Sampling Distribution Quiz 1 (25 MCQs)

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1. What name refers to the standard deviation of the sampling distribution?

2. We take an SRS of a sample of 300 students from 2500 students at PVHS and 300 students from 1500 students at St. Augustine. The standard deviation of the sampling distribution of mean gpa is

3. Parameter is the numerical characteristic of _____

4. Find the area under the standard normal curve to the right of z =-2.67.

5. The weights of horses are approximately normal with a mean of 1, 500 lbs. and a standard deviation of 30 lbs. What is the probability that the mean weight of 36 randomly selected horses is greater than 1560 pounds?

6. The mean and standard deviation of a population are 200 and 20, respectively. What is the probability of selecting 25 data values with a mean less than 190?

7. The population of number of presents each child in a family gets on Christmas is strongly skewed right. The central limit theorem states _____

8. The mean distance an ASA student travels to school is 5.6 miles with a standard deviation of 1.7 miles. Is it more likely to find one student that travels more than 6 miles to school or a mean of a sample of 29 students that travel more than 6 miles?

9. In a crash test of 15 troopers, collision repair costs are found to have a distribution that is approximately normal with a mean of $ 1800. Assume that the population standard deviation is $ 950. Construct a 99% confidence interval for the repair cost.

10. A statistic is biased if _____

11. It is a process of selecting n sample size in the population via random number or through lottery method.

12. Which of the following is NOT an example of random sampling?

13. Of all dogs in a city are micro-chipped. In a sample of 50 dogs, what is the probability that less than 12 dogs are micro-chipped?

14. Increasing the sample size of an opinion poll will reduce the

15. The Central Limit Theorem states that if the original distribution is (approximately) normal OR the sample size is greater than or equal to _____, then the sampling distribution is approximately normal.

16. The 40 yards sprint times for a soccer team are found to be normally distributed with a mean of 5.2 seconds and a standard deviation of 0.3 seconds. What is the z-score for a player who runs a time of 5.6 seconds?

17. In the game of Scrabble, each player begins by drawing 7 tiles from a bag containing 100 tiles. There are 42 vowel, 56 consonants, and 2 blank tiles in the bag. Cait chooses an SRS of 7 tiles. Let p-hat be the proportion of vowels in her sample. Is the Law of Large Counts met in this example?

18. If n=1, then the sampling distribution would have a size of _____

19. What happens to the shape of a sampling distribution of sample means as "n" increases?

20. What is the Middle initial of my Statistics Teacher?

21. A z-score is considered "unusual" if its absolute value is greater than _____

22. A population consists of 12 members. If samples of 4 are taken WITH replacement, how many possible samples are there?

23. According to the Center for Disease Control, 93% of children entering kindergarten in the U.S. are vaccinated.Find the probability that a sample of 16 children would have fewer than 14 vaccinated.

24. The process of dividing the population into subgroups or 'strata' and drawing members at random from each subgroup or 'strata'.

25. A random sampling distribution of the mean is normally distributed when

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Sampling Distribution Quiz 1 (25 MCQs)

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