Table 11. Estimated UK PCB sales for the period 1954-79 UK sales (t) of congener no. 28 1 500 52 1.600 1.500 101 138 153 180 780 1 200 390 ΣPCB 40 000

On the day a grandchild is born, a grandparent deposits $2500 in a fund earning 7.5% interest, compounded continuously. Determine the balance in the account on the grandchild’s 25th birthday.

Find the mean hourly cost when the cell phone described above is used for 240 minutes.

2/ 9 80% 1) There are three different types of charges that AEP uses to determine the amount it will charge a household for electricity usage each month. The first type of charge is the "customer charge", which is a flat monthly rate (adjusted annually) that each household is charged. A second type of charge is the "transmission service" charge, which reflects how much it costs the electric company to move electricity from the power generating plants to the different substations (before being distributed to the households). A customer's fee for transmission service depends on the amount of electricity used by that individual household. The third type of charge is the "distribution service" charge, which reflects the cost to distribute the electricity from the local substation to the household. The distribution service charge is also based on the amount of electricity used by the individual household. Suppose that AEP charges a monthly fee of $8.40 to each household as its customer…

Table 1. Violent victimization, by type of crime, 2016, and 2017 Appendix table 3. Standard errors for table 1: Violent victimization, by type of crime, 2016, and 2017   From the estimation of the number of Rape/sexual assault (298,410) in 2016 at 95% CI, what is the lower limit? (Round off to one decimal place if necessary)

Suppose that in a family savings equation, for the years 1990, 1991, and 1992, we let kidsit denote the number of children in family i for year t. If the number of kids is constant over this three-year period for most familiesin the sample, what problems might this cause for estimating the effect that the number of kids has on savings?

sec 90

True or false: If a 90% CI for the population mean age is calculated to be [56 years, 66years] then this implies that approximately 90% of the population will be between 56 and 66 years old

Answer C (i), (ii), (iii) only.

Figure 6(a) shows the time series of the annual suicide rate (per 100,000 inhabitants) in Australia, between 1915 and 2004. Figure 6(b) shows the first differences of the rate and Figure 6(c) shows the second differences. Suicide rato 1600- 14 00 10.00 8.00- 6.00- (a) 1915 1325 2.00- A EM 0.00- 2.00- (1920 1045 1955 Year 1965 MY way 1075 1985 4.00- 1995 -4.00- Figure 6(a), (b) & (c) (b) 1915 (929 1942 ·1960 Year Sist y 1385 1005 2.00- 0.00- 2.00- -4.00- (c) Ho 1915 1925 1938 ·1245 A9985 Year 1205 A 1975 A ·$353 easy Is the suicide rate stationary over the period? Identify the order of differencing d required to obtain stationarity in mean and in variance. Explain your answer.