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Given a normally distributed population with known standard deviation of o = 4, and suppose we...
A random sample of 49 measurements from a population with population standard deviation o 3 had...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
We want to estimate the mean starting salary in a population of graduates. Approximately normally distributed....
We want to estimate the mean starting salary in a population of graduates. Approximately normally distributed. Standard deviation = 10 In a random sample of 31 graduates, the mean starting salary was 61.8 and the standard deviation was 12. 1. What is the lower (smaller) endpoint of the 90% confidence interval for the population mean? 2. What is the upper (larger) endpoint of the 90% confidence interval for the population mean? 3. If null hypothesis = 60 and alternate hypothesis...
Consider the following hypotheses: H0: μ-360 The population is normally distributed with a population standard deviation...
Consider the following hypotheses: H0: μ-360 The population is normally distributed with a population standard deviation of 73. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic with x = 389 and n = 80, (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2 what is the conclusion at the 10% significance level? Do not reject...
The number of miles traveled by birds is known to be normally distributed. A random sample...
The number of miles traveled by birds is known to be normally distributed. A random sample of 43 birds results in a mean distance of 2.64 miles with a standard deviation of 0.15 miles. You've been asked to construct a 95% confidence interval for the mean number of miles traveled. Based on this you would use the table. none of the above. Ttable Ftable Z table Question 16 1 pts Consider the following competing hypotheses: HON= 0, HAU# 0. The...
The sample of six measurements shown below was randomly selected from a normally distributed population. Complete...
The sample of six measurements shown below was randomly selected from a normally distributed population. Complete parts a throughc 1,3, 1, 5, 1,2 a. Test the null hypothesis that the mean of the population is 3 against the alternative hypothesis, 3. Use a 0.10. If a = 0.10, find the rejection region for the test. Choose the correct answer below O A. t 2.015 or t> 2.015 O C. t-2015 O E. t1476 O B. t-1.476 O D. t 1.476...
A sample mean, sample standard deviation, and sample size are given. Use the one meant test...
A sample mean, sample standard deviation, and sample size are given. Use the one meant test to perform the required hypothesis test about the mean, , of the population from which the sample was drawn. Use the P-value approach. Also, assess the strength of the evidence against the null hypothesis. x-22,298, s=14200, n = 17, HO: P = 30,000, Ha# 30,000 a -0.05. Test statistic: 224. P.value 0.0200. Reject the null hypothesis. There is sufficient evidence to conclude that the...
Suppose that for some hypothesis test on the mean of a normally distributed population, standard deviation known, the P...
Suppose that for some hypothesis test on the mean of a normally distributed population, standard deviation known, the P- value is computed as 0.11. If a level of significance of 0.05 is used, is rejecting the null hypothesis in favor of the alternative the correct decision? Yes No
Suppose a quantitative variable is normally distributed in the population. We conduct a t-test for a...
Suppose a quantitative variable is normally distributed in the population. We conduct a t-test for a population mean with the following hypotheses. The null hypothesis is equal to 50, the alternative hypothesis is not equal to 50. A sample size of 30 has a t-statistic of -2.43. Find the corresponding P-value
A sample of size 100, taken from a population whose standard deviation is known to be...
A sample of size 100, taken from a population whose standard deviation is known to be 8.90, has a sample mean of 51.16. Suppose that we have adopted the null hypothesis that the actual population mean is greater than or equal to 52, that is, H0 is that μ ≥ 52 and we want to test the alternative hypothesis, H1, that μ < 52, with level of significance α = 0.05. a) What type of test would be appropriate in...
The age distribution of the Canadian population and the age distribution of a random sample of...
The age distribution of the Canadian population and the age distribution of a random sample of 455 residents in the Indian community of a village are shown below. Age (years) Percent of Canadian Population Observed Number in the Village Under 5 7.2% 44 5 to 14 13.6% 74 15 to 64 67.1% 296 65 and older 12.1% 41 Use a 5% level of significance to test the claim that the age distribution of the general Canadian population fits the age...
A random sample of 49 measurements from a population with population standard deviation o 3 had a sample mean of x, 9. An independeent random sample of sample mean of x, 11. Test the claim that the population means are 64 measurements from a second population with population standard deviation a2 4 had different. Use level of significance 0.01. (a) What distribution does the sample test statistic follow? Explain. The student's t. We assume that both population distributions are approximately...
We want to estimate the mean starting salary in a population of graduates. Approximately normally distributed. Standard deviation = 10 In a random sample of 31 graduates, the mean starting salary was 61.8 and the standard deviation was 12. 1. What is the lower (smaller) endpoint of the 90% confidence interval for the population mean? 2. What is the upper (larger) endpoint of the 90% confidence interval for the population mean? 3. If null hypothesis = 60 and alternate hypothesis...
Consider the following hypotheses: H0: μ-360 The population is normally distributed with a population standard deviation of 73. (You may find it useful to reference the appropriate table: z table or t table) a-1. Calculate the value of the test statistic with x = 389 and n = 80, (Round intermediate calculations to at least 4 decimal places and final answer to 2 decimal places.) Test statistic a-2 what is the conclusion at the 10% significance level? Do not reject...
The number of miles traveled by birds is known to be normally distributed. A random sample of 43 birds results in a mean distance of 2.64 miles with a standard deviation of 0.15 miles. You've been asked to construct a 95% confidence interval for the mean number of miles traveled. Based on this you would use the table. none of the above. Ttable Ftable Z table Question 16 1 pts Consider the following competing hypotheses: HON= 0, HAU# 0. The...
The sample of six measurements shown below was randomly selected from a normally distributed population. Complete parts a throughc 1,3, 1, 5, 1,2 a. Test the null hypothesis that the mean of the population is 3 against the alternative hypothesis, 3. Use a 0.10. If a = 0.10, find the rejection region for the test. Choose the correct answer below O A. t 2.015 or t> 2.015 O C. t-2015 O E. t1476 O B. t-1.476 O D. t 1.476...
A sample mean, sample standard deviation, and sample size are given. Use the one meant test to perform the required hypothesis test about the mean, , of the population from which the sample was drawn. Use the P-value approach. Also, assess the strength of the evidence against the null hypothesis. x-22,298, s=14200, n = 17, HO: P = 30,000, Ha# 30,000 a -0.05. Test statistic: 224. P.value 0.0200. Reject the null hypothesis. There is sufficient evidence to conclude that the...
Suppose that for some hypothesis test on the mean of a normally distributed population, standard deviation known, the P- value is computed as 0.11. If a level of significance of 0.05 is used, is rejecting the null hypothesis in favor of the alternative the correct decision? Yes No
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