your friend Kathryn is an extremely competitive cyclist. She wants to be sure that she's biking more kilometers than the average racing in the area. She takes random sample of other cyclist in area and comes up the data you`ll find in the exam 2 Excel file (data for Exam 2) in the worksheet labelled "weekly kilometers Cycled:

1)What`s the point estimate of the average kilometers cycled in a week? (please round to the second decimal point)

2) What`s the point estimate of the standard deviation of kilometers cycle in a week? (please round to the second decimal point)

3)please construct a confidence interval around this sample average. if Kathryn wants to be 95%sure that she `s biking more kilometers than the population average. how many kilometers per week should she aim to bike? (in other words what`s the upper found of confidence interval you constructed? (please round to the second decimal point)

Weekly Kilometers 308 257 574 117 616 677 136 122 432 722 131 264 240 373 782 714 569 178 763 775 196 677 273 332 410