![1. [7 marks in total] A statistics practitioner took a random sample of 31 observations from a normal population. The sample](http://img.homeworklib.com/questions/82eb7d00-9906-11ea-a858-19449140c336.png?x-oss-process=image/resize,w_560)
![2. [10] Fifty-one people are randomly selected and the accuracy of their wristwatches is checked. with positive errors repres](http://img.homeworklib.com/questions/8385b8f0-9906-11ea-8667-19a5286c447e.png?x-oss-process=image/resize,w_560)
![3. [10] A study wanted to determine if a fitness program was effective. The subjects were 30 overweight adults aged 40 to 50](http://img.homeworklib.com/questions/841dbfb0-9906-11ea-bdc4-4bfc532db56a.png?x-oss-process=image/resize,w_560)
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1. [7 marks in total] A statistics practitioner took...
(1 point) A statistics practitioner took a random sample of 51 observations from a population whose...
(1 point) A statistics practitioner took a random sample of 51 observations from a population whose standard deviation is 23 and computed the sample mean to be 110. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 95% confidence, changing the population standard deviation to 48; Confidence...
A statistics practitioner took a random sample of 54 observations from a population whose standard deviation...
A statistics practitioner took a random sample of 54 observations from a population whose standard deviation is 33 and computed the sample mean to be 105. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence interval = C. Estimate the population mean with 99%...
please help. thank you so much !! 1 2 0.0702 0.0702 incorrect incorrect At least one...
please help. thank you so much !!
1
2
0.0702 0.0702 incorrect incorrect At least one of the answers above is NOT correct. 1 of the questions remains unanswered. (1 point) A random sample of 100 observations from a population with standard deviation 8.31 yielded a sample mean of 91.5. Part 1: Part 2: - Part 3 Given that the null hypothesis is p = 90 and the alternative hypothesis is x 90 using a = .05, find the following:...
im so grateful for all your help! this has helped me in so many ways especially...
im so grateful for all your help! this has helped me in so
many ways especially with all the things going on right now. thank
you so much !!
1
2
3
4
(1 point) 35 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 35 values have a mean of 94sec and...
1. A random sample of 30 boxes of bolts was purchased at a local hardware store...
1. A random sample of 30 boxes of bolts was purchased at a local hardware store and the average number of bolts per box was 52. It is known that the population standard deviation of bolts per box is 6 bolts. a Is this a z or t-distribution? Why? b. Find and interpret a 95% confidence interval to estimate the average number of bolts per box for all boxes in the population. Round to 3 decimal places. C What would...
Question 1 to 11, True or False? Applied business statistics 1) The width of the confidence...
Question 1 to 11, True or False? Applied business statistics
1) The width of the confidence interval depends only on the desired level of confidence 2) When population standard deviation is unknown, sample standaird deviation is used and the interval estimation is based on values from the t- rather than the z-distribution n 3) The z value for a 98% confidence interval around the point estimate is 2.33 4) In order to construct a 90% confidence interval for the population...
A data set includes data from student evaluations of courses. The summary statistics are nequals 91,...
A data set includes data from student evaluations of courses. The summary statistics are nequals 91, x overbar equals4.17, sequals 0.69. Use a 0.10 significance level to test the claim that the population of student course evaluations has a mean equal to 4.25 . Assume that a simple random sample has been selected. Identify the null and alternative hypotheses, test statistic, P-value, and state the final conclusion that addresses the original claim. What are the null and alternative hypotheses? A....
1.) Assume that a sample is used to estimate a population proportion p. Find the margin...
1.) Assume that a sample is used to estimate a population proportion p. Find the margin of error m that corresponds to the given statistics and confidence level. Round the margin of error to four decimal places. 95% confidence; n = 380, x = 50 Group of answer choices 0.0340 0.0408 0.0306 0.0357 2.) Formulate the indicated conclusion in nontechnical terms. Be sure to address the original claim. A researcher claims that 62% of voters favor gun control. Assuming that...
Given in the table are the BMI statistics for random samples of men and women. Assume...
Given in the table are the BMI statistics for random samples of men and women. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a 0.01 significance level for both parts. Male BMI Female BMI μ μ1 μ2 n 45 45 x 27.3958 24.7599 s 7.837628 4.750044 a. Test the claim that males and females have...
Please Help! Need to confirm my answer. You wish to test the claim that the average...
Please Help! Need to confirm my answer. You wish to test the claim that the average IQ score is less than 100 at the .01 significance level. You determine the hypotheses are: Ho: μ = 100 H1: μ < 100 You take a simple random sample of 100 individuals and find the mean IQ score is 95.7, with a standard deviation of 16. Let's consider testing this hypothesis two ways: once with assuming the population standard deviation is not known...
(1 point) A statistics practitioner took a random sample of 51 observations from a population whose standard deviation is 23 and computed the sample mean to be 110. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 95% confidence, changing the population standard deviation to 48; Confidence...
A statistics practitioner took a random sample of 54 observations from a population whose standard deviation is 33 and computed the sample mean to be 105. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence interval = C. Estimate the population mean with 99%...
please help. thank you so much !!
1
2
0.0702 0.0702 incorrect incorrect At least one of the answers above is NOT correct. 1 of the questions remains unanswered. (1 point) A random sample of 100 observations from a population with standard deviation 8.31 yielded a sample mean of 91.5. Part 1: Part 2: - Part 3 Given that the null hypothesis is p = 90 and the alternative hypothesis is x 90 using a = .05, find the following:...
im so grateful for all your help! this has helped me in so
many ways especially with all the things going on right now. thank
you so much !!
1
2
3
4
(1 point) 35 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 35 values have a mean of 94sec and...
1. A random sample of 30 boxes of bolts was purchased at a local hardware store and the average number of bolts per box was 52. It is known that the population standard deviation of bolts per box is 6 bolts. a Is this a z or t-distribution? Why? b. Find and interpret a 95% confidence interval to estimate the average number of bolts per box for all boxes in the population. Round to 3 decimal places. C What would...
Question 1 to 11, True or False? Applied business statistics
1) The width of the confidence interval depends only on the desired level of confidence 2) When population standard deviation is unknown, sample standaird deviation is used and the interval estimation is based on values from the t- rather than the z-distribution n 3) The z value for a 98% confidence interval around the point estimate is 2.33 4) In order to construct a 90% confidence interval for the population...
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