DVD Player Sales The table shows the number of DVD play- ers sold in a small electronics store in the years 2003–2013. Year DVD players sold 2003 495 2004 513 2005 410 2006 402 2007 520 2008 580 2009 631 2010 719 2011 624 2012 582 2013 635 (a) What was the average rate of change of sales between 2003 and 2013? (b) What was the average rate of change of sales between 2003 and 2004? (c) What was the average rate of change of sales between 2004 and 2005? (d) Between which two successive years did DVD player sales increase most quickly? Decrease most quickly?

Nonfatal accidents during January 2019 to October 2019 are listed in Table 4. The traffic department assigned a task to data analyst whether the monthly totals of nonfatal accidents are decreasing (increasing). Table 4.Shows the list of the nonfatal accidents Month 1 2 3 4 5 6 7 8 9 10 Nonfatal 454 352 | 434 492| 511 555 448 532 515 477 (a) Calculate coefficient of determination between the number of months and the nonfatal accidents. (b) Interpret (in context) the value of the coefficient of determination. What do your analysis show about the increase of decrease of nonfatal accidents?

The following table shows a study involving interviewees who were asked to provide information about how much they spend on their phone bill each month.     (i)         How many people did we interview? (ii)        How many people are there who spend between $30 and $95 per month? (iii)       What is the fraction of people who spend between $75 and $90 per month among all interviewees?   Table attached in picture

The population of a small country by year is shown in the table below. Year 1960 1955 284496 Population 367825 The absolute change in the between 1960 and 1965 is: 83329 The percentage change in the population between 1960 and 1965 : 773 • The average rate of change in the population between 1960 and 1965 is: Interpolate to predict the population of the state in 1963. • Interpolate to predict the population of the state in 1968. • Extrapolate to predict the population of the state in 1977. 1965 1970 510844 679471 (Round your answer to o ong decimal place) people per year (Give your exact answer) people people (Round to the nearest whole number) people (Round to the nearest whole number) people (Round to the nearest whole number)

The Consumer Price Index provides a means of determining the purchasing power of the U.S. dollar from one year to the next. To use the Consumer Price Index to predict a price in a particular year, we can set up a proportion and compare it with a known price in another year as follows:(price in year A)/(index in year A)=(price in year B)/(index in year B)In 1986 the Consumer Price Index was 109.6 and in 2010 it was 218.1. Find the amount that would be charged in 2010 for the use of the same amount of electricity that cost $110 in 1986. Give your answer to the nearest dollar.

The following table gives the number of commercial airline accidents and fatalities in the United States in the years from 1985 to 2006. Give a cumulative relative frequency plot of the number of yearly airline accidents Fatal Fatal Fatal- Fatal- Departures (millions) Acci- Departures (millions) Acci- Year dents ities Year dents ities 1985 6.1 4 197 1996 7.9 3 342 1986 6.4 5 1997 9.9 3 3 1987 6.6 4 231 1998 10.5 1 1 1988 6.7 3 285 1999 10.9 2 12 1989 6.6 11 278 2000 11.1 2 89 1990 7.8 39 2001 10.6 531 1991 7.5 4 62 2002 10.3 1992 7.5 4 33 2003 10.2 22 1993 7.7 1 1 2004 10.8 1 13 1994 7.8 4 239 2005 10.9 3 22 1995 8.1 2 166 2006 11.2 2 50

What is the relative frequency of deaths that occurred in 2000 or before?

What is the Fratio for these data?

We have measurements from eight companies for the % workforce change in 2010 from 2009 and the % change in profits from 2010 to 2011. % workforce change (x): 1.0 % profit change (y): 1.5 -0.4 -2.6 -3.8 -5.8 -2.5 -0.1 0.4 0.4 0.1 -0.2 -0.5 -7.5 0.2 0.3 We can calculate: Er = -12.7, Ex² = 64.51, Συ--6.8 , Σ 57, Σεy- 46.35. Find the sample correlation between the two variables, and fit a simple linear model to the dataset. Also, plot the residuals, ri, against xi, and comment on the fit of the model.

Cumulative Frequency (More Than and Less Than): In a bank, the following were the deposits of current account during January 2000. Calculate Median. 900 800 600 550 500 400 250 100 Deposit Balance Less than: No. of Deposits: 1000 480 478 460 455 420 354 280 105