Be sure to show all your work. You may use a calculator, your notes, and the tab

Question

Be sure to show all your work. You may use a calculator, your notes, and the tables in your textbook but not your cell phone or laptop. All questions are worth 5 points. 1. The standard deviation of is referred to as the a. standard proportion b. sample proportion c. average proportion d standard error of the proportion 2. The standard deviation of is referred to as the a. standard x b. standard error of the mear c. sample standard mean d. sample mean deviation 3. The expected value of the random variable 2 is a, b. c. d. ? the standard error the sample size 4. A theorem that allows us to use the normal probability distribution to approximate the sampling distribution of sample means and sample proportions whenever the sample size is large is known as the a. approximation theorem b. normal probability theorem c. central limit theorem d. central normality theorem 5. A population has a mean of 53 and a standard deviation of 21. A sample of 49 observations will be taken. The probability that the sample mean will be greater than 57.95 is a. b. 0495 c. 4505 d. None of the alternative answers is correct 6. As a general rule, the sampling distribution of the sample proportions can be approximated by a normal probability distribution whenever a. np25 b. n(I -p)25 c. n2 30 d. Both np 2 5 and n(1 -p) 2 5 are true.

Explanation / Answer

1 d 2 b 3 d 4 c 5 b 6 d 7 b 8 c 9 b 10 d 11 a 12 b 13 d 14 b 15 b 16 b 17 b 18 b 19 20 0.01 to 0.025

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