3. Human IQ scores are approximately normally distributed with mean 100 and standard deviation 15. Determine the minimum IQ scores for the top 5% of the population.

Consider a population proportion p = 0.20. a. What are the expected value and the standard error for the sampling distribution of the sample proportion with n = 20 and n = 58? Note: Round the standard error to 4 decimal places. Answer is complete and correct. n Expected value Standard error 20 58 0.20 0.20 0.0894 0.0525 b. Can you conclude that the sampling distribution of the sample proportion is approximately normally distributed for both sample sizes? Yes, the sampling distribution of the sample proportion is normally distributed for both sample sizes. No, the sampling distribution of the sample proportion is not normally distributed for either sample size. No, only the sample proportion with n = 20 will have a normal distribution. No, only the sample proportion with n = 58 will have a normal distribution. c. If the sampling distribution of the sample proportion is normally distributed with n = 20, then calculate the probability that the sample proportion is between 0.18 and 0.20.…

Where does the 60% come from? on part a Step 2?

The average time of students spend on reading per day is __________. a sample random variable a fixed variable a continuous random variable a discrete random variable

4. Using the following returns, calculate the arithmetic average returns, the variances, and the standard deviations for X and Y. Year 1 2 3 4 5 X 12% 28% 9% -7% 10% Return Y 25% 34% 13% -27% 14%

2. Which of these distributions would you expect to have the highest standard deviation?     Age of children in a fourth grade classroom     Height of players on a high school basketball team     Number of books read by people in New York State     Number of M&Ms in a sample of 10 M&M packets

None