People swam across lake ontario from niagara on the lake to toronto (52 km, or about 32.3 mi) 62 times between 1954 and 2016. we might be interested in whether the swimmers are getting any faster or slower. here are the regression of the crossing times (minutes) against the year since 1954 of the crossing and a plot of the residuals against year since 1954:

Acircle has a circumference of 28.36 units what is the diameter of the circle

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

A50% increase followed by 33 1/2% decrease