Question

You may need to use the appropriate appendix table or technology to answer this question Older people often have a hard time finding work. AARP reported on the number of weeks it takes a worker aged 55 plus to find a job. The data on number of weeks spent searching for a job contained In the file JobSearch are consistent with the AARP findings. 21 14 51 16 12 14 16 12 4 0 13 24 19 28 26 26 10 21 - 36 22 >> 17 17 10 19 16 22 22 (*) Provide a point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job {) AS confidence, what is the margin of ervar? (Round your answer to four decimal places) 38020 te) What is the 95% confidence interval estimate of the mean? (Round your answers to two decimal places.) weeks to 2580 18.20 (d) Discuss the degree of skewness found in the sample data. What sugestion would you make for a repeat of this study A histogram of the data shows some evidence that the distribution may be skewed to the right. One might sugest collecting a larger sample, at least so, in the future A histogram of the data shows the distribution is perfectly symmetri. One might suggest collecting a larger sample, at least on the future. A histogram of the data shows the distribution is perfectly symmetri. One might sugest collecting a smaller samt most 15, in the Mure A histogram of the data shows some evidence that the distribution may be skewed to the right. One might suggest collecting a smaller sample of most 15, in the

Answer 1

of Estimates of population mean number of weeks it takes a worker of aged 55 puns to find a job=22 . (From the given derta) At 95% confidence, x=0.05 we know, Margin of error = Zale* Hene, 2412 = 20.025=1-966 from normal distribution table) Prom the ginendate, we have, n=40, J = 11.8862 50 af 954. confidence, Mergin of error = Ha 1-96* 11-8862 140 = 3.6836 we know, ہا c) Here, scumple mean, ã= 22, sd, = 11.8882 100(1-0)% confidence interval of meon (50 FZXdz so, Hew.957. confidence interval = [ 227 (1.96* 11.8962 vão :)] = [18-3164, 25-6831) 50,957.cmfidence interrel estimates of mean 18. 3164 weeks to 25.6836 weeks. d) A hüdogram of the date shouy some evidence that the distribution may be skewed to the right, one might suggest collecting a largest sample, at least 30 in the future.