A search on Best Barryo Mobile's website for "smartwatch" produced ninety-two results, 40 of which are actual smartwatches. Their prices are summarized in the frequency table below:

Price ($) Number of Watches

50 to under 100 3

100 to under 150 6

150 to under 200 9

200 to under 250 7

250 to under 300 9

300 to under 350 6

a.Calculate an approximate value for the sample variance.

s2=

Round to two decimal places if necessary

b.Calculate an approximate value for the sample standard deviation.

s=

Round to two decimal places if necessary