Homework Answers
Use Excel function to find critical values
NORMSINV(1-0.05)
= 1.645
Option D is Correct
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To test the claim that the mean population height is greater than 5.6 ft. Assume that...
To test the claim that mean weight is greater than 166.3 lbs. A sample of 40...
To test the claim that mean weight is greater than 166.3 lbs. A sample of 40 people showed that the sample mean was 172.55. If the population standard deviation is known to be 26.33 lbs. Find the critical value when alpha=5% Question 1 options: 1.645 1.96 2.58 3.12
Suppose you want to test the claim that the mean is less than or equal to...
Suppose you want to test the claim that the mean is less than or equal to 25.6. Given a sample size of n = 40 with sample standard deviation of 2, and a level of significance of alpha = 0.05, when would you reject the null hypothesis? Select one: a. Reject null if the test statistic is greater than 1.96. b. Reject null if the test statistic is greater than 2.021. c. Reject null if the test statistic is greater...
_ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous...
_ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous studies, it is assumed that the standard deviation, , 124 inches and that the population of height measurements is normally distributed a) Construct the confidence interval for the population mean height of women b) If the sample size was doubled to 20 women, what will be the effect on the confidence interval? 10) 10) The numbers of advertisements...
Provide an appropriate response. Determine the critical value, zo, to test the claim about the population...
Provide an appropriate response. Determine the critical value, zo, to test the claim about the population proportion p= 0.250 given n = 48 and p = 0.231 Use a=0.01. O +1.96 0 +1.645 +2.33 +2.575 QUEST 12.5 points Save Answer Provide an appropriate response. Determine the standardized test statistic, z, to test the claim about the population proportion p2 0.132 given n = 48 and p=0.11. Use a -0.05. -0.124 -0.568 -0.45 -1.645 QUEST 12.5 points Save Answer Provide an...
17 and 18 please. Thank you. gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of...
17 and 18 please. Thank you.
gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of female giraffes is。 5 feet. Calculate the 85% confidence interval of for population mean height of female giraffes. 16) A sample of 21 male giraffes are chosen. The mean height is found to be 17.5 feet. The standard deviation of the sample is found...
Question 1) Llantas Inc. claims that the average life of a certain tire is greater or...
Question 1) Llantas Inc. claims that the average life of a certain tire is greater or equal than 25,000 miles under normal driving conditions (assume that the population is normally distributed). A random sample of 16 tires is tested. The mean of the sample is 24,000 miles and the standard deviation of the sample is 4,000 miles. What is the critical value? Use alpha = .05. Question 1 options: 1) -1.00 2) -1.753 3) -1.645 4) 1.753 Question 2 (5...
You wish to test the claim that the first population mean is greater than the second...
You wish to test the claim that the first population mean is greater than the second population mean at a significance level of α = 0.002 . H o : μ 1 = μ 2 H a : μ 1 > μ 2 You obtain the following two samples of data. Sample one 70.3 82.4 62.3 97.4 69.1 63.3 64.7 89.4 81.6 67.6 82.0 51.0 53.4 68.8 73.5 sample2 60.2 61.0 62.8 62.8 75.3 77.4 68.8 61.0 58.5 What is...
(17) Homeowners claim that the mean speed of automobiles traveling on their street is greater than...
(17) Homeowners claim that the mean speed of automobiles traveling on their street is greater than 35 mph. A random sample of 100 automobiles has a mean speed of 36 mph. Assume the population standard deviation is 4 mph. Since your friend lives on this street, you decide to test this claim to see if it is true. (Gi) State the null and alternative hypotheses. ii) Calculate the P-value for this test. (iii Is there enough evidence to support this...
It is known that the mean of height of the population of women is 65 inches....
It is known that the mean of height of the population of women is 65 inches. A random sample of 18 supermodels was selected, and they had a mean height of 69.9 inches and a standard deviation of 1.2 inches. Use a 0.05 significance level to test the claim that mean heights of female supermodels are larger than the mean heights of women in general. a.) Write the claim using an appropriate math expression b.) Define the Null and Alternate...
Assume that the data has a normal distribution and the number of observations is greater than...
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. α-0.05for a left-tailed test. SELECT ALL APPLICABLE CHOICES B) 1.96 士1.96 ±1.645 1.645 E) None of these 19 Assume that a simple random sample has been selected from a normally distributed population and test the conclusion that addresses the original claim and select three correct choices. A test of sobriety SELECT ALL...
_ 9) In a sample of 10 randomly selected women, it was found that their mean height was 634 inches. From previous studies, it is assumed that the standard deviation, , 124 inches and that the population of height measurements is normally distributed a) Construct the confidence interval for the population mean height of women b) If the sample size was doubled to 20 women, what will be the effect on the confidence interval? 10) 10) The numbers of advertisements...
Provide an appropriate response. Determine the critical value, zo, to test the claim about the population proportion p= 0.250 given n = 48 and p = 0.231 Use a=0.01. O +1.96 0 +1.645 +2.33 +2.575 QUEST 12.5 points Save Answer Provide an appropriate response. Determine the standardized test statistic, z, to test the claim about the population proportion p2 0.132 given n = 48 and p=0.11. Use a -0.05. -0.124 -0.568 -0.45 -1.645 QUEST 12.5 points Save Answer Provide an...
17 and 18 please. Thank you.
gleater than 700 pounds? DIe 81 31 female giraffes are chosen. The mean height is found to be 15 feet. Assume that the population standard deviation for the height of female giraffes is。 5 feet. Calculate the 85% confidence interval of for population mean height of female giraffes. 16) A sample of 21 male giraffes are chosen. The mean height is found to be 17.5 feet. The standard deviation of the sample is found...
(17) Homeowners claim that the mean speed of automobiles traveling on their street is greater than 35 mph. A random sample of 100 automobiles has a mean speed of 36 mph. Assume the population standard deviation is 4 mph. Since your friend lives on this street, you decide to test this claim to see if it is true. (Gi) State the null and alternative hypotheses. ii) Calculate the P-value for this test. (iii Is there enough evidence to support this...
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. α-0.05for a left-tailed test. SELECT ALL APPLICABLE CHOICES B) 1.96 士1.96 ±1.645 1.645 E) None of these 19 Assume that a simple random sample has been selected from a normally distributed population and test the conclusion that addresses the original claim and select three correct choices. A test of sobriety SELECT ALL...
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