The average expenditure on valentine's day was expected to be (usa today, february 13, 2006). do male and female consumers differ in the amounts they spend? the average expenditure in a sample survey of male consumers was , and the average expenditure in a sample survey of female consumers was . based on past surveys, the standard deviation for male consumers is assumed to be , and the standard deviation for female consumers is assumed to be . the value is . round your answers to decimal places. a. what is the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females? 62.73 b. at confidence, what is the margin of error? c. develop a confidence interval for the difference between the two population means.

The table shows the relationship between the number of cups of cereal and the number of cups of raisins in a cereal bar recipe: number of cups of cereal number of cups of raisins 8 2 12 3 16 4 molly plotted an equivalent ratio as shown on the grid below: a graph is shown. the title of the graph is cereal bars. the horizontal axis label is cereal in cups. the x-axis values are 0, 20, 40, 60, 80,100. the vertical axis label is raisins in cups. the y-axis values are 0, 10, 20, 30, 40, 50. a point is plotted on the ordered pair 40,20. which of these explains why the point molly plotted is incorrect? (a) if the number of cups of cereal is 40, then the number of cups of raisins will be10. (b)if the number of cups of raisins is 40, then the number of cups of cereal will be10. (c) if the number of cups of cereal is 40, then the number of cups of raisins will be 80. (d) if the number of cups of raisins is 40, then the number of cups of cereal will be 80.