Question

A random sample of 100 observations was drawn from a normal population. The sample variance was...

A random sample of 100 observations was drawn from a normal population. The sample variance was calculated to be s^2 = 220. Test with α = .05 to determine whether we can infer that the population variance differs from 300. Use p-value (from chi-square table) and critical value

Homework Answers

Answer #1

Please upvote my answer if you like it

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A random sample of 11 observations was taken from a normal population. The sample mean and...
A random sample of 11 observations was taken from a normal population. The sample mean and standard deviation are xbar= 74.5 and s= 9. Can we infer at the 5% significance level that the population mean is greater than 70? I already found the test statistic (1.66) but I’m at a loss for how to find the p-value.
A random sample of 34 observations is used to estimate the population variance. The sample mean...
A random sample of 34 observations is used to estimate the population variance. The sample mean and sample standard deviation are calculated as 51.5 and 5.6, respectively. Assume that the population is normally distributed. (You may find it useful to reference the appropriate table: chi-square table or F table) a. Construct the 90% interval estimate for the population variance. b. Construct the 95% interval estimate for the population variance
A random sample of 10 observations was drawn from a large population. These are:7, 12. 8,4.9,3,...
A random sample of 10 observations was drawn from a large population. These are:7, 12. 8,4.9,3, 4, 9, 5, 2 Test to determine if we can infer at the 5% significance level that the population mean is not equal to 5. command :menu analyze →compare means →one sample t test → test variable   test value options:confidence interval Must have process
a A random sample of eight observations was taken from a normal population. The sample mean...
a A random sample of eight observations was taken from a normal population. The sample mean and standard deviation are x = 75 and s = 50. Can we infer at the 10% significance level that the population mean is less than 100? b Repeat part (a) assuming that you know that the population standard deviation is σ = 50. c Review parts (a) and (b). Explain why the test statistics differed.
A random sample of 100 observations from a quantitative population produced a sample mean of 30.8...
A random sample of 100 observations from a quantitative population produced a sample mean of 30.8 and a sample standard deviation of 7.8. Use the p-value approach to determine whether the population mean is different from 32. Explain your conclusions. (Use α = 0.05.) Find the test statistic and the p-value. (Round your test statistic to two decimal places and your p-value to four decimal places.) z = p-value =
A random sample of 100 observations from a normal population whose standard deviation is 50 produced...
A random sample of 100 observations from a normal population whose standard deviation is 50 produced a mean of 75. Does this statistic provide sufficient evidence at the 5% level of significance to infer that the population mean is not 80?
A random sample of 100 observations from a population with standard deviation 17.18 yielded a sample...
A random sample of 100 observations from a population with standard deviation 17.18 yielded a sample mean of 93.3 1. Given that the null hypothesis is μ=90 and the alternative hypothesis is μ>90 using α=.05, find the following: (a) Test statistic = (b) P - value: (c) The conclusion for this test is: A. There is insufficient evidence to reject the null hypothesis B. Reject the null hypothesis C. None of the above 2. Given that the null hypothesis is...
A random sample of 100 observations from a population with standard deviation 23.35 yielded a sample...
A random sample of 100 observations from a population with standard deviation 23.35 yielded a sample mean of 94.5. 1. Given that the null hypothesis is μ=90, and the alternative hypothesis is μ>90 and using α=.05, find the following: (a) Test statistic = (b) P - value: (c) The conclusion for this test is: A. Reject the null hypothesis B. There is insufficient evidence to reject the null hypothesis C. None of the above 2. Given that the null hypothesis...
The sample mean and standard deviation from a random sample of 29 observations from a normal...
The sample mean and standard deviation from a random sample of 29 observations from a normal population were computed as x¯=36 and s = 10. Calculate the t statistic of the test required to determine whether there is enough evidence to infer at the 7% significance level that the population mean is greater than 31. Test Statistic =
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.