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The statistical software output for this problem is:
From above output:
= 1 - Power = 1 - 0.7997 = 0.2003
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A random sample of n = 40 observations from a quantitative population produced a mean x...
A random sample of n = 45 observations from a quantitative population produced a mean x...
A random sample of n = 45 observations from a quantitative population produced a mean x = 2.6 and a standard deviation s = 0.33. Your research objective is to show that the population mean μ exceeds 2.5. Calculate β = P(accept H0 when μ = 2.6). (Use a 5% significance level. Round your answer to four decimal places.)
A random sample of n = 50 observations from a quantitative population produced a mean x = 2.6 and a standard deviation s = 0.35
A random sample of n = 50 observations from a quantitative population produced a mean x = 2.6 and a standard deviation s = 0.35. Your research objective is to show that the population mean y exceeds 2.5. Calculate β = P(accept H0 when μ = 2.6). (Use a 5% significance level. Round your answer to four decimal places.)
A random sample of n = 45 observations from a quantitative population produced a mean x...
A random sample of n = 45 observations from a quantitative population produced a mean x = 2.2 and a standard deviation s = 0.33. Your research objective is to show that the population mean u exceeds 2.1. Calculate B = P(accept H, when u = 2.2). (Use a 5% significance level. Round your answer to four decimal places.) B = 0 You may need to use the appropriate appendix table or technology to answer this question.
A random sample of 50 observations from a quantitative population produced a sample mean of 65.4...
A random sample of 50 observations from a quantitative population produced a sample mean of 65.4 and a variance of 2.8. What is the point estimate? a. 65.4 b. 50 c. 2.8 d. 1.67332 e. None of the above.
Suppose a random sample of n = 25 observations is selected from a population that is...
Suppose a random sample of n = 25 observations is selected from a population that is normally distributed with mean equal to 106 and standard deviation equal to 15. (a) Give the mean and the standard deviation of the sampling distribution of the sample mean x̄. mean= standard deviation= (b) Find the probability that x̄ exceeds 115. (Round your answer to four decimal places.) (c) Find the probability that the sample mean deviates from the population mean μ...
A sample of 16 observations selected from a population produced a mean of 82 and a...
A sample of 16 observations selected from a population produced a mean of 82 and a standard deviation of 14. Another sample of 18 observations selected from another population produced a mean of 75 and a standard deviation of 16. Assume that the two populations are normally distributed and the standard deviations of the two populations are equal. The alternative hypothesis is that the mean of the first population is greater than the mean of the second population. The significance...
A sample of 40 observations is selected from a normal population. The sample mean is 20,...
A sample of 40 observations is selected from a normal population. The sample mean is 20, and the population standard deviation is 2. Use the 0.05 significance level. H0 : μ ≤ 19 H1 : μ > 19 A) what is the value of the test statistics? ( round answer to 2 decimal places) B) what is your decision regarding H0? Fail to reject or reject C) what is the p- value? ( round your answer to 4 decimal...
A simple random sample of size n=40 is drawn from a population. The sample mean is...
A simple random sample of size n=40 is drawn from a population. The sample mean is found to be 106.9,and the sample standard deviation is found to be 15.1. Is the population mean greater than 100 at the α=0.025 level of significance? A) Determine the null and alternative hypotheses. B) Compute the test statistic C) Determine the P-value. (Round to three decimal places as needed.) D) What is the result of the hypothesis test? ____ the null hypothesis because the...
6) A sample of 40 observations is selected from a normal population. The sample mean is...
6) A sample of 40 observations is selected from a normal population. The sample mean is 31, and the population standard deviation is 3. Conduct the following test of hypothesis using the 0.05 significance level. a) Is this a one or two- tailed test? b) What is the decision rule? (Round your answer 2 decimal places) _____ HO, when z > ______ c) What is the value of the test statistic? Value of the test statistic ______ d) What is...
A random sample of 105 observations produced a sample mean of 29. Find the critical and...
A random sample of 105 observations produced a sample mean of 29. Find the critical and observed values of z for the following test of hypothesis using a 0.1. The population standard deviation is known to be 9 and the population distribution is normal. Ho: u 28 versus H 28 Round your answers to two decimal places Zcritical left Zcritical right=| Zobserved A random sample of 104 observations produced a sample mean of 29. Find the critical and observed values...
A random sample of n = 45 observations from a quantitative population produced a mean x = 2.2 and a standard deviation s = 0.33. Your research objective is to show that the population mean u exceeds 2.1. Calculate B = P(accept H, when u = 2.2). (Use a 5% significance level. Round your answer to four decimal places.) B = 0 You may need to use the appropriate appendix table or technology to answer this question.
A random sample of 105 observations produced a sample mean of 29. Find the critical and observed values of z for the following test of hypothesis using a 0.1. The population standard deviation is known to be 9 and the population distribution is normal. Ho: u 28 versus H 28 Round your answers to two decimal places Zcritical left Zcritical right=| Zobserved A random sample of 104 observations produced a sample mean of 29. Find the critical and observed values...
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