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Exercise 10.05 Algorithmic Question 1 of 3 I D Check My Work (No more tries available) The USA Today reports that the average expenditure on Valentine's Day is $100.89. Do male and female consumers differ in the amounts they spend? The average expenditure in a sample survey of 46 male consumers was $135.67, and the average expenditure in a sample survey of 32 female consumers was $68.64. Based on past surveys, the standard deviation for male consumers is assumed to be $33, and the standard deviation for female consumers is assumed to be $20. a. What is the point estimate of the difference between the population mean expenditure for males and the population mean expenditure for females (to 2 decimals)? -0 b. At 99% confidence, what is the margin of error (to 2 decimals)? -9 c. Develop a 99% condence interval for the difference between the two population means (to 2 decimals]. Use z-table. (\"6.0) Hide Feedback Check My Work (No more tries available)