students There are 8000 first year students 5000 male and 3000 female is most interested in differences between male and female first about the school She gives you the assignment public university wants to determine You decide to use a sample of 800 stratified by gender Choose the way to do the sampling a Pick 400 males and 400 females at random Pick 500 males and 300 females at random Pick 300 males and 500 females at random Pick 600 males and 200 females at random b c d 2 Suppose your older sister just had her first child Her pediatrician tells her that her baby is at the third quartile for weight Which statement below is most correct about your sister s newborn 8000 fy 5000 m3 3000 F a Her baby weighs about 75 of the average weight b About 75 of all babies weigh less than your sister s baby Her baby weighs about the same as 75 of all babies d About 75 of all babies weigh more than your sister s baby c Ratio d Interval 3 Given the following salaries 40 000 142 000 144 000 145 000 147 000 149 000 150 000 Which statement below is most correct no calculations needed a The mean is the best measure for the center of these data b The median is the best measure for the center of these data c The mean and median are both equally good measures for the center of these data The mean will be above the median for these data 4 In a study of the aggressiveness of grizzly bears a sample of grizzly bears is ranked as follows 0 not aggressive at all 1 somewhat aggressive 2 highly aggressive This kind of variable would be a Qualitative b Quantitative 5 Which of the following is the least prone to being biased a Convenience sampling b Random sampling Systematic sampling d Stratified sampling