lindsey measures the length of 100 beetles and gets a mean of 2.56 inches with a standard deviation of 0.34 inches. She then realizes that her ruler was off and each measurement was 0.5 inches too long. Also, she decides it would have been better to measure in centimeters (2.54 cm = 1 in) because that is what scientists are supposed to do. If Lindsay takes each measurement and subtracts 0.5 inches and than multiplies by 2.54, what would the new mean and standard deviation be?

Kevin has a spinner that has 10 equal sections and 2 sections of each color—red, blue, green, yellow, and purple. kevin spins the spinner 180 times. kevin determines about how many times the spinner will land on red or green, and his work is shown below. -kevin has the formula reversed; it should be the total number of sections over the number of red or green sections. -kevin should have used a 4 in the numerator because there are 2 red sections and 2 green sections. -kevin should multiply by the number of sections in the spinner rather than the total number of spins. -kevin calculated the prediction correctly and did not make any mistakes.