Education levels of girls and boys a development economist is interested in whether average years of schooling of girls and boys are the same in a certain developing country. a random sample of 250 girls yields a mean of 5.1 years, and a standard deviation of 1.2 years. an independent random sample of 280 boys yields a mean of 6.3 years, and a standard deviation of 1.7 years. test the null hypothesis that mean years of schooling is the same in the populations of girls (x population) and boys (y population), against the alternative hypothesis that the population means are different. use a 5% level of significance. there are 8 multiple choice questions for this problem. 8. what are the correct null and alternative hypotheses?

Jodi is trying to save money for a down payment on a house. she invests $6,000 into an account paying 5.5% simple interest. for how long must she save if she needs $7,300 for the down payment? a. 2 years b. 3 years c. 4 years d. 5 years

Xyz corporation has provided the following data concerning manufacturing overhead for july: actual manufacturing overhead incurred $ 69,000 manufacturing overhead applied to work in process $ 79,000 the company's cost of goods sold was $243,000 prior to closing out its manufacturing overhead account. the company closes out its manufacturing overhead account to cost of goods sold. which of the following statements is true? multiple choice manufacturing overhead was overapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $253,000 manufacturing overhead was underapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $233,000 manufacturing overhead was underapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $253,000 manufacturing overhead was overapplied by $10,000; cost of goods sold after closing out the manufacturing overhead account is $233,000

Schonhardt corporation's relevant range of activity is 2,500 units to 5,500 units. when it produces and sells 4,000 units, its average costs per unit are as follows: averagecost per unitdirect materials $ 7.60direct labor $ 2.90variable manufacturing overhead $ 1.65fixed manufacturing overhead $ 2.90fixed selling expense $ 0.95fixed administrative expense $ 0.65sales commissions $ 0.75variable administrative expense $ 0.65if 4,500 units are produced, the total amount of fixed manufacturing cost incurred is closest to: multiple choicea $16,800b $11,400c $11,600d $15,400