i need in words not handwritten solution Use Minitab software to answer the following questions:Interpret all answers.Q4: In a retail store, a sample of 20 customers had an average age of 38.7years and standard deviation of 12.5. A retail store owner claims thatthe mean age of their customers is 40 years old.a) Construct a 99% confidence interval for the mean age.b) Test at level a = 0.05 the claim that the mean age is less than 40 yearsold.

4. From the given information, Sample size is 20. Sample average is 38.7 standard deviation is 12.5…

Answered: Use Minitab software to answer the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Use the data file A2Q2.xlsx to answer this question. A sample containing years tomaturity and yield for 40 corporate bonds is contained in the file A2Q2.xlsx.a. What is the sample mean years to maturity for corporate bonds and what is thesample standard deviation?b. Develop a 95% confidence interval for the population mean years to maturity.c. What is the sample mean yield on corporate bonds and what is the sample standard deviation?d. Develop a 95% confidence interval for the population mean yield on corporatebonds. Company Ticker Years to Maturity Yield HSBC 12.00 4.079 GS 9.75 5.367 C 4.75 3.332 MS 9.25 5.798 C 9.75 4.814 TOTAL 5.00 2.069 MS 5.00 4.739 WFC 10.00 3.682 TOTAL 10.00 3.270 TOTAL 3.25 1.748 BAC 9.75 4.009 RABOBK 9.75 3.203 GS 9.25 5.755 AXP 5.00 2.181 MTNA 5.00 4.366 MTNA 10.00 6.046 JPM 8.25 2.310 GE 28.00 5.030 LNC 10.00 4.163 BAC 8.00 3.699 FCX 15.00 4.030 GS 25.50 6.013 RABOBK 4.75 2.755 GE 24.75 5.008 HCN 8.00…
Use the data file A2Q3.xlsx to answer this question. A sample containing years to maturity and yield for 40 corporate bonds is contained in the file A2Q3.xlsx. a. What is the sample mean years to maturity for corporate bonds and what is the sample standard deviation? b. Develop a 95% confidence interval for the population mean years to maturity. c. What is the sample mean yield on corporate bonds and what is the sample standard deviation? d. Develop a 95% confidence interval for the population mean yield on corporate bonds.
According to Dietary Goals for the US (1977), high sodium intake may be related to ulcers, stomach cancer, and migraine headaches. The human requirement for salt is less than 220 milligrams per day, which is surpassed in most single servings of ready- to-eat noodles. If a random sample of 9 similar servings of noodles has a mean sodium content of 238 milligrams and a standard deviation of 8.3. What is the standard error of the 95% confidence interval of the mean sodium content of the noodles being investigated? Note: Round your answer to 4 decimal places.
Use the data file A2Q2.xlsx to answer this question. A sample containing years tomaturity and yield for 40 corporate bonds is contained in the file A2Q2.xlsx.A. What is the sample mean yield on corporate bonds and what is the sample standard deviation? B. Develop a 95% confidence interval for the population mean yield on corporate bonds. Company Ticker Years to Maturity Yield HSBC 12.00 4.079 GS 9.75 5.367 C 4.75 3.332 MS 9.25 5.798 C 9.75 4.814 TOTAL 5.00 2.069 MS 5.00 4.739 WFC 10.00 3.682 TOTAL 10.00 3.270 TOTAL 3.25 1.748 BAC 9.75 4.009 RABOBK 9.75 3.203 GS 9.25 5.755 AXP 5.00 2.181 MTNA 5.00 4.366 MTNA 10.00 6.046 JPM 8.25 2.310 GE 28.00 5.030 LNC 10.00 4.163 BAC 8.00 3.699 FCX 15.00 4.030 GS 25.50 6.013 RABOBK 4.75 2.755 GE 24.75 5.008 HCN 8.00 4.184 GE 11.50 3.778 VOD 5.00 1.855 NEM 12.00 3.866 GE 1.00 0.767 C 29.75 8.004 SHBASS 5.00 2.261 PAA 10.25 3.856 GS 5.75 3.558 TOTAL 1.75 1.378 MS 6.00 3.413 WFC…
Use the data file A2Q2.xlsx to answer this question. A sample containing years tomaturity and yield for 40 corporate bonds is contained in the file A2Q2.xlsx.A. What is the sample mean yield on corporate bonds and what is the sample standard deviation? B. Develop a 95% confidence interval for the population mean yield on corporate bonds. Company Ticker Years to Maturity Yield HSBC 12.00 4.079 GS 9.75 5.367 C 4.75 3.332 MS 9.25 5.798 C 9.75 4.814 TOTAL 5.00 2.069 MS 5.00 4.739 WFC 10.00 3.682 TOTAL 10.00 3.270 TOTAL 3.25 1.748 BAC 9.75 4.009 RABOBK 9.75 3.203 GS 9.25 5.755 AXP 5.00 2.181 MTNA 5.00 4.366 MTNA 10.00 6.046 JPM 8.25 2.310 GE 28.00 5.030 LNC 10.00 4.163 BAC 8.00 3.699 FCX 15.00 4.030 GS 25.50 6.013 RABOBK 4.75 2.755 GE 24.75 5.008 HCN 8.00 4.184 GE 11.50 3.778 VOD 5.00 1.855 NEM 12.00 3.866 GE 1.00 0.767 C 29.75 8.004 SHBASS 5.00 2.261 PAA 10.25 3.856 GS 5.75 3.558 TOTAL 1.75 1.378 MS 6.00 3.413 WFC…
According to Dietary Goals for the US (1977), high sodium intake may be related to ulcers, stomach cancer, and migrane headaches. The human requirement for salt is less than 220 milligrams per day, which is surpassed in most single servings of ready-to-eat noodles. If a random sample of 9 similar servings of noodles has a mean sodium content of 235 milligrams and a standard deviation of 5.3. What is the lower bound of the 95% confidence interval of the mean sodium content of the noodles being investigated? Note: Round your answer to 4 decimal places.
A larger sample mean from a population with the same standard deviation, using the same sample size and significance level, produces a confidence interval which is: {check all that apply} a. the same width b. zero c. narrower d. wider

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