The percentage of metal alloy used in metal casting is measured in 41 random selected parts. The sample standard deviation is s=0.42. Construct a 95% two-sided confidence interval for variance. Please show solution and answer should be 4 decimal places
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- The mean age when smokers first start is 13 years old with a population standard deviation of 1.8 years. A researcher thinks that smoking age has significantly changéd since the invention of ENDS-electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 31 smokers found that their mean starting age was 12.2 years old. Do the data support the claim at the 5% significance level? What are the correct hypotheses? Ho: Select an answerv?v уears Ha: Select an answerv?v years The test is: O Two-tailed O One-tailed Suhmit Ouaction 8. y W e %24The variance in drug weighs is critical in the pharmaceutical industry. For specific drug, with weights measured in grams, a sample of 18 units provided a sample variance =0.36. A. Construct a 90% confidence interval estimate of the population variance for the weight of this drug. B. Construct a 90% confidence interval estimate of the population standard deviation. use excel pleaseThe mean age when smokers first start is 13 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS-electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 31 smokers found that their mean starting age was 12.3 years old. Do the data support the claim at the 5% significance level? What are the correct hypotheses? Ho: Select an answer v ? v years H1: Select an answer v years Based on the hypotheses, find the following: Test Statistic z = (Round to 4 decimal places.) Critical Values = + (Round to 2 decimal places.) Based on the above we choose to Select an answer The correct summary would be: Select an answer that the mean age smokers first start is different than 13.
- Please give handwrittenThe mean age when smokers first start is 13 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS- electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 30 smokers found that their mean starting age was 12.2 years old. Do the data support the claim at the 1% significance level? What are the correct hypotheses? Ho: Select an answer v ? v years H3: Select an answer v years The test is: O One-tailed O Two-tailedPLEASE USE THE 4 STEP PROCESS USED IN AP STATISTICS. SHOW ALL WORK AND STEPS.
- You want to estimate the mean weight of quarters in circulation. A sample of 60 quarters has a mean weight of 5.682 grams and a standard deviation of 0.061 gram. Use a single value to estimate the mean weight of all quarters. Also, find the 95% confidence interval for the average weight of all quarters. The estimate for the mean weight of all quarters is (Round to three decimal places as needed.) grams. Find the 95% confidence interval for the mean weight of all quarters. grams < p< grams (Round to three decimal places as needed.)A researcher wants to estimate the difference between the mean score points of home and visitor teams in a basketball game. For this purpose, researcher randomly selects 24 basketball games and obtains their scores. In these games, home teams' mean score is 80 points with a standard deviation of 35 points while visitor teams' mean score is 79 points with a standard deviation of 10 points. Assuming equal population variances, find the (93)% confidence interval for the difference between the mean score points of home and visitor teams.Four hundred badminton enthusiasts burn an average of 250 calories playing for an hour with a standard deviation of 36 calories. Estimate the mean caloriesburned in playing badminton at 99% confidence level.
- The mean and standard deviation of system blood pressure of 200 employees in a factory were 127mmhg and 13 mmHg respectively. Calculate and interprete the 95% confidence interval of systolic blood pressure of the employeesThe mean age when smokers first start is 13 years old with a population standard deviation of 1.8 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS-electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 31 smokers found that their mean starting age was 12.4 years old. Do the data support the claim at the 1% significance level? What are the correct hypotheses? Họ: Select an answer ♥ years H1: Select an answer v years Based on the hypotheses, find the following: Test Statisticz = (Give answer to at least 4 decimal places) p-value = (Give answer to at least 4 decimal places) Based on the above we choose to Select an answer The correct summary would be: Select an answer mean age smokers first start is different than 13. that the claim that theHelp
