Question

Older people often have a hard time finding work. A research group 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 is given in the table below. 21 14 51 16 17 14 16 12 48 0 27 17 32 24 12 10 52 21 26 14 13 24 19 28 26 26 10 21 44 36 22 39 17 17 10 19 16 22 5 22

(a) Provide a point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job. Correct: Your answer is correct. weeks

(b) At 95% confidence, what is the margin of error? (Round your answer to four decimal places.) weeks

(c) What is the 95% confidence interval estimate of the mean? (Round your answers to two decimal places.) Incorrect: Your answer is incorrect. weeks to Incorrect: Your answer is incorrect. weeks

(d) Discuss the degree of skewness found in the sample data. What suggestion 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 suggest collecting a larger sample, at least 50, in the future.

A histogram of the data shows the distribution is perfectly symmetric. One might suggest collecting a smaller sample, at most 15, in the future.

A histogram of the data shows the distribution is perfectly symmetric. One might suggest collecting a larger sample, at least 50, in the future.

A histogram of the data shows some evidence that the distribution may be skewed to the right. One might suggest collecting a smaller sample, at most 15, in the future.

Answer 1

(a) Point estimate = sample mean = 22.



(d) We drew a histogram of the data and it is given below.

A histogram of the data shows some evidence that the distribution may be skewed to the right. One might suggest collecting a larger sample, at least 50, in the future.