Random samples of sizes n1  25 and n2  20 were selected from populations A and B, respectively. From the samples, the standard deviations were computed to be s1  5.2 and s2  6.8. a. Do the data provide substantial evidence to indicate the populations have different standard deviations

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

What is the measure of sty in oo below? 130 310 230 50

Which of the functions below could have created this graph?