23. Weighing Seals with a Camera Listed below are the overhead widths (cm) of seal measured from photographs and the weights (kg) of the seals (based on "Mass Estimatio of Weddell Seals Using Techniques of Photogrammetry," by R. Garrott of Montana Stat University). The purpose of the study was to determine if weights of seals could be deter mined from overhead photographs. Is there sufficient evidence to conclude that there is linear correlation between overhead widths of seals from photographs and the weights c the seals? Overhead Width 7.2 7.4 9.8 9.4 8.8 8.4 Weight 116 154 245 202 200 191

A researcher believed that the number of rental cars in service by a car rental company would have an impact on the total annual revenue for that car rental company. Five small car rental companies were surveyed, with the number of Cars in service recorded in units of 1000 (so if a car rental company had 54000 cars in service, a 54 would be recorded) and Annual Revenue measured in millions of dollars (so an Annual Revenue of $10,000,000 would be recorded as 10). The data follows: Cars (1,000s)       Annual Revenue ($ millions)11.5                   118 10.0                   135 9.0                     100 5.5                     37 3.3                     32 Part of the Excel-generated Simple Linear Regression output is provided below: ANOVA   df SS MS F Significance F Regression 1 7891.863897 7891.863897 22.91180151 0.017339231 Residual 3 1033.336103 344.4453677     Total 4 8925.2           Coefficients Standard Error t Stat P-value Intercept -19.12490108 23.1658578…

A saleswoman works for a base salary of $360 a month plus 7% commission on all the merchandise she sells beyond $6,000. If she sells $8,700 worth of merchandise in one month, what will her total salary be for the month? The total salary for the month would be $ Enter an integer or decimal number [more..]

Please help me answer the following questions. Thank you

During his short stint as Shadow Finance Minister, Barnaby Joyce displayed a curious grasp of numbers. One of his most infamous exclamations was “All this billions, quillions, Brazilians.” Less well known was his tax-reform proposal, recommending that if you earn $x per day, you are taxed x% of that amount (with the understanding that you pay 100% tax if you earn $100 or more per day. Under Senator Barnaby’s plan, which amount x gives you the highest earnings after tax has been taken out?