A sample of n = 16 scores is obtained from a normal population with a s = 12. The sample mean is 43.
a. What is the point estimate of the population mean?
b. Make an interval estimate of m so that you are 95% confident that the mean is in your interval.
A sample of n = 16 scores is obtained from a normal population with a s...
A sample of n = 16 scores is obtained from a population with a mean of 70 and standard deviation of 20. If the sample mean is 75, then the z-score corresponding to the sample mean is ____. Hint: You need to use the sampling distribution of the mean for a sample size of 16 and population standard deviation of 20.
A random sample of n - 16 scores is selecdted from a normal population with a mean of p - 50. After atreatment is administered to the individuals in the sample, the sample mean is found to be M -54 If the population standard deviation is σ-8, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with α-.05. (Hint: Recall that the critical value for a two-tailed test with α-.05 is...
The following sample data are from a normal population: 14, 12, 16, 19, 17, 15, 10, 9. (a) What is the point estimate of the population mean? (b) What is the point estimate of the population standard deviation? (Round your answer to three decimal places.) (c) With 95% confidence, what is the margin of error for the estimation of the population mean? (Round your answer to one decimal place.) (d) What is the 95% confidence interval for the population mean?...
The following sample of n = 4 scores was obtained from a population with unknown parameters. Scores: 2, 2, 6, 2 Compute the sample mean and standard deviation. Note: These are descriptive values that summarize the sample data. (Round your answers to two decimal places.) M = S = Compute the estimated standard error for M. (Note: This is an inferential value that describes how accurately the sample mean represents the unknown population mean.) SM =
The following sample data are from a normal population: 5, 16, 11, 7, 19, 15, 10, 1. a. What is the point estimate of the population mean? b. What is the point estimate of the population standard deviation (to 2 decimals)? c. With 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)? d. What is the 95% confidence interval for the population mean (to 1 decimal)?
A sample of n = 9 scores is obtained from a population with u = 70 and o = 5. If the sample mean is M = 80, then what is the z-score for the sample mean? a. z=0.33
A random sample of n = 27 scores is obtained from a population with σ = 35. If the sample mean is 46 points greater than the population mean, what is the z-score for the sample mean? 6.83 2.2 -4.67 46
you have a normal population of scores with u=60 and o=10. we obtained a random sample of n=40. what is the probability that the sample mean will be less than 54?
Problem(8) (6 points) A random sample of n observations was obtained from a population with unknown mean y and variance (assumed to be approximated by s?) o?. Calculate a 95% confidence interval for p for each of the following situation: (a) n = 100, i = 28, $2 = 16. (b) n = 16, i = 102, 92 = 25.
The following sample data are from a normal population: 10, 9, 12, 14, 13, 11, 6, 5 a. What is the point estimate of the population mean? b. What is the point estimate of the population standard deviation (to 2 decimals)? c. With 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)? d. What is the 95% confidence interval for the population mean (to 1 decimal)?