Question

According to a travel website, workers in a certain country lead the world in vacation days, averaging 21.98 days per year. The following data show the number of paid vacation days for a random sample of 20 workers from this country. Complete parts a through c below.

88	44	88	66	1919	2222	1818	2222	1919	2727
2020	3030	2929	1616	3232	2929	3434	3434	3636	6262

a.	Construct a 90 % confidence interval to estimate the average number of paid vacation days for workers from this country.

The 90 % confidence interval to estimate the average number of paid vacation days for workers from this country is from nothing days to nothing days.

Answer 1

sample mean         x=	23.750
sample size             n=	20.00
sample std deviation s=	13.290
std error sx=s/√n=	2.9717

for 90% CI; and 19 df, critical t=		1.7291
margin of error E=t*std error                            =		5.138
lower bound=sample mean-E =		18.612
Upper bound=sample mean+E=		28.888
from above 90% confidence interval for population mean =18.61 days to 28.89 days