In a population with a mean of 50, what is the deviation score for X = 45?
| a | 5 |
| b | –5 |
| c | 45 |
| d | cannot be determined without more information |

In a population with a mean of 50, what is the deviation score for X =...
For a normal population with an average of 60 and a standard deviation of 12 what is the probability of selecting a random sample of 36 scores with a sample mean greater than 64? p(M greater than 64)? a 50% b .9772 or 97.72 % c. .8777 or 87.77% d. .0228 or 2.28% A population has a mean of 50 and a standard deviation of 5, find the z-score that corresponds to a sample mean of M=55 for a sample...
A random sample of size 36 is taken from a population with a mean of 50 and a standard deviation of 5. The sampling distribution of ________. A. cannot be determined B. is skewed to the right C. is skewed to the left D. is approximately normal
A population of scores has a standard deviation of 5. In this population a raw score of 45 corresponds to a z score of 1.5. What is the population mean?
A population has a mean of 200 and a standard deviation of 50. Suppose a random sample of 100 people is selected from this population. What is the probability that the sample mean will be within +/- 5 of the population mean? Hint: use the z-score.
Consider a population of 300 with a mean of 50 and a standard deviation equal to 29 What is the probability of obtaining a sample mean of 53 or less from a sample of 45? What is the probability of obtaining a sample mean of 53 or less from a sample of 45? P(`x≤53)=_
A population has a mean of 200 and a standard deviation of 50. A sample of size 100 will be taken and the sample mean will be used to estimate the a. What is the expected value of x? b. What is the standard deviation of x? c. 18. population mean Show the sampling distribution of x What does the sampling distribution of i show?
What is the standard deviation for a score of X = 40 from a population with a µ = 50 and a z = - 2.00?
3. On one I.Q. test, the mean score (µ) is 100 and the population standard deviation (σ) is 15. A sample of 50 scores is selected from a very large population. Find the probability that the mean of the sample group is more than 103.
5. Suppose X follows a normal distribution with mean u = 200 and standard deviation o = 40. Find each of the following probabilities. (8 points) a. P(160 < x < 232) b. P(X > 160) C. P(X < 100) d. P(230 < x < 284) 6. Sup Suppose we know that SAT scores have a population average u = 1080 and a standard deviation o = 200. A university wants to give merit scholarships to all students with an...
A population distribution has mean 50 and standard deviation 20. For a random sample of size 100, the sampling distribution of the sample mean has: A. mean 5 and standard deviation 2 B. mean 0.5 and standard deviation 0.2 C. mean 50 and standard deviation 0.2 D. mean 50 and standard deviation 2 E. mean 50 and standard deviation 20