A statistics teacher wants to see if there is any difference in the abilities of students enrolled in statistics today and those enrolled five years ago. Final examination scores from a random sample of students enrolled today and from a random sample of students enrolled five years ago were selected. Today Five years ago

x bar 82 88

σ squared 112.5 54

η 45 36

The 95% confidence interval for the difference between the two population means is .

a. -9.92 to -2.08

b. -3.92 to 3.92

c. -13.83 to 1.84

d. -24.228 to 12.23

Consider a small island country whose only industry is weaving. the following table shows information about the small economy in two different years. complete the table by calculating physical capital per worker as well as labor productivity. hint: recall that productivity is defined as the amount of goods and services a worker can produce per hour. in this problem, measure productivity as the quantity of goods per hour of labor. year physical capital labor force physical capital per worker labor hours output labor productivity (looms) (workers) (looms) (hours) (garments) (garments per hour of labor) 2024 160 40 1,800 14,400 2025 180 60 3,900 23,400

Who has summer school : ( because i do : (

True tomato inc. makes organic ketchup. to promote its products, this firm decided to make bottles in the shape of tomatoes. to accomplish this, true tomato worked with its bottle manufacture to create a set of unique molds for its bottles. which of the following specialized assets does this example demonstrate? (a) site specificity (b) research specificity (c) physical-asset specificity (d) human-asset specificity