Question

8. A random sample is obtained from a normal population with a mean of µ =...

8. A random sample is obtained from a normal population with a mean of µ = 80 and a standard deviation of σ = 8. Which of the following outcomes is more likely? Explain your answer.

          A. A sample mean greater than 86 for a sample of n = 4 scores.

          B. A sample mean greater than 84 for a sample of n = 16 scores.

9. The distribution of SAT scores is normal with a mean of µ = 500 and a standard deviation of σ = 100. If the mean SAT score is computed from a sample of n = 100 students from this population…

A. What range of values should contain the sample mean 95% of the time?

B. What range of values should contain the sample mean 99% of the time?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A sample of n = 4 scores is selected from a normal population with a mean...
A sample of n = 4 scores is selected from a normal population with a mean of µ = 50 and a standard deviation of σ = 20. What is the probability of obtaining a sample mean greater than M = 48?
A normal population has a mean of µ = 100. A sample of n = 36...
A normal population has a mean of µ = 100. A sample of n = 36 is selected from the population, and a treatment is administered to the sample. After treatment, the sample mean is computed to be M = 106. Assuming that the population standard deviation is σ = 12, use the data to test whether or not the treatment has a significant effect. Use a one tailed test. Hypothesis:                                        Zcrit = z test calculation:                                                                  Conclusion:
A random sample is selected from a normal population with a mean of µ = 30...
A random sample is selected from a normal population with a mean of µ = 30 and a standard deviation of σ= 8. After a treatment is administered to the individuals in the sample, the sample mean is found to be x̅ =33. Furthermore, if the sample consists of n = 64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α = .05. 4a. Which of the following...
A random sample of size 36 is taken from a population with mean µ = 17...
A random sample of size 36 is taken from a population with mean µ = 17 and standard deviation σ = 4. The probability that the sample mean is greater than 18 is ________. a. 0.8413 b. 0.0668 c. 0.1587 d. 0.9332
IQ scores are standardized to produce a normal distribution with a mean of µ = 100...
IQ scores are standardized to produce a normal distribution with a mean of µ = 100 and a standard deviation of σ = 15. Find the proportion of the population in the following IQ category: IQ greater than 160. The proportion is Group of answer choices .0039 .49997 .008 .00003
A random sample of size 49 is taken from a population with mean µ = 26...
A random sample of size 49 is taken from a population with mean µ = 26 and standard deviation σ = 7. Use an appropriate normal transformation to calculate the probability that the sample mean is between 24 and 27. Group of answer choices 0.0228 0.8641 0.8413 0.8185
A random sample is selected from a normal population with a mean of μ = 20...
A random sample is selected from a normal population with a mean of μ = 20 and a standard deviation of σ =5 10. After a treatment is administered to the individuals in the sample, the sample mean is found to be M = 25. If the sample consists of n = 25 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with alpha = .05.
The sample mean and standard deviation from a random sample of 33 observations from a normal...
The sample mean and standard deviation from a random sample of 33 observations from a normal population were computed as x¯=34 and s = 8. Calculate the t statistic of the test required to determine whether there is enough evidence to infer at the 10% significance level that the population mean is greater than 30.
1) A sample is obtained from a population with μ = 35 and σ = 8....
1) A sample is obtained from a population with μ = 35 and σ = 8. Which of the following samples would produce the z score closest to 0? A sample (n = 36) with M = 33.5 A sample (n = 16) with M = 37 A sample (n = 64) with M = 33 A sample (n = 100) with M = 36 2) A sample obtained from a population with σ = 30 has a standard error...
Suppose that we will take a random sample of size n from a population having mean...
Suppose that we will take a random sample of size n from a population having mean µ and standard deviation σ. For each of the following situations, find the mean, variance, and standard deviation of the sampling distribution of the sample mean : (a) µ = 18, σ = 2, n = 22 (Round your answers of "σ " and "σ 2" to 4 decimal places.) (b) µ = 494, σ = .3, n = 125 (Round your answers of...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT