Suppose that a country has the following female age structure in the year 2005: Half the women die at age 40 and half live to to age 60. Starting in the year 2005, each woman has one daughter at age 20. What does the age structure of the female population look like in the year 2025? In 2045? In 2065? Age Population 0-25 60 21-40 40 41-60 20
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- Section 2.2 (77) Frogs have been breeding like flies at the Enormous State University (ESU) campus! Each year, the pledge class of the Epsilon Delta fraternity is instructed to tag all the frogs residing on the ESU campus. Two years ago, they managed to tag all 50,000 of them (with little Epsilon Delta Fraternity tags). This year’s pledge class discovered that last year’s tags had all fallen off, and they wound up tagging a total of 75,000 frogs. a)Find an exponential model for the frog population. b)Assuming exponential population growth and that all this year’s tags have fallen off, how many tags should Epsilon Delta order for next year’s pledge class?Question 1 In 2015, there will be more Blue A jays than Cardinals. The data table below shows a count of different bird types in Windsor. According to the trends, what prediction about 2015 populations seems likely? Bird Type 2012 2013 2014 In 2015, there will be more Blackbird 201 223 231 B Chickadees than Blackbirds. Seagull 145 203 255 Blue Jay 200 176 152 In 2015, there will be more Blackbirds than Blue jays. Cardinal 301 298 304 Chickadee 144 122 110 Hummingbird 290 285 288 In 2015, there will be more D Cardinals than Crows. Crow 300 322 346A university offers a Calculus class, a Sociology class, and a Spanish class. You are given data below about a group of students who have all taken at least one of the three classes. (i) Group 1 contains 187 students. Of these, 61 students have taken Calculus, 78 have taken Sociology, and 72 have taken Spanish. 15 have taken both Calculus and Sociology, 20 have taken both Calculus and Spanish, and 13 have taken both Sociology and Spanish. How many students in Calculus have taken all three classes? (ii) You are given the following data about Group 2. 32 students have taken Calculus, 22 have taken Sociology, and 16 have taken Spanish. 10 have taken both Calculus and Sociology, 8 have taken both Calculus and Span-
- Imagine that you were hired as a consultant by a local business owner tohelp her determine how many paid days off she should provide to her employees. In general, she wants to establish some sort of standard for her employees and for herself. Based on data provided by the government, you conclude that on average, workers in the United States take 14 paid days off per year. The data for the eight employees who work at the company you are consulting for are: 12, 9, 7, 12, 13, 14, 14, and 12 days. Thequestion you are trying to answer is, are the number of days off taken by the eight employees statistically different from the data provided by the US government? (I have stated the null and alternative hypotheses, and found that this is a two-tailed test. With alpha=0.05, I have found the t-critical value to be +/- 2.365, with DF=7)I need help with: A. Compute the appropriate test statistic. Use the computational formula tocompute the sample standard deviation. Show all formulas that you…The numbers of users that check social media daily is the same for "35 to 44" and "45 to 54" age groups. IF there are 41 million "35-45" year olds in North America, how many "45-54" year olds are there?67. Population of New York Table 1.24 shows the population of New York State for several years. Let x = O represent 2000, x = 1 represent 2001, and so forth. TABLE 1.24 , 2) Population of New York State Year Population (thousands) 2003 19,231 2004 19,301 3 2005 19,336 2006 19,367 2007 19,429 2008 19,490 Source: Statistical Abstract of the United States, 2010. (a) Find the exponential regression equation for the data and superimpose its graph on a scatter plot of the data. (b) Use the regression equation to predict the population in 2009. (c) Use the exponential regression equation to estimate the annual rate of growth of the population of New York State.
- 4. A medium-sized company characterized their employees based on the sex of the employee and their length of service to the company. The results are summarized in the table below. Years Employed 0-5 6-10 11-20 > 20 Total Male 25 20 15 65 Sex Female 30 25 10 65 Total 55 45 25 130 What proportion of the employees are male or have been employed for less than 11 years?ch12-15. If there are 46 data points in a set of data, what is the number of degrees of freedom? (Enter an exact number as an integer, fraction, or decimal.)You are in graduate school and are now doing research on housing affordability in Oregon for your masters thesis. You believe that housing affordability throughout the state has diminished over the past 60 years. But you need data to support your research. You interview 100 individuals from the Baby boom, Gen X, Millennial, and Gen Z generations to find out the type of residence they lived in 5 years after graduation. You collect the following data: Babyboom Gen X Millenial Gen Z House (Owner) 53 49 40 30 House (Rental) 22 25 38 35 Apartment or other 25 26 22 35 You hypothesize that the type of residence five years after graduation is independent of generation, complete the hypothesis test below. Let α = .05 A. State the null and alternative hypotheses B. Specify the level of significance C. Compute the value of the test statistic D. Compute the p-value E.Reject the null hypothesis if the p-value ≤α…
- 15. Test Match. Sachin Tendulkar, a former cricket player of India played International cricket from 1989 to 2013. His debut match was a test match against Pakistan in 1989. He has played a total of 200 test matches with a total of 15,921 runs. The following table shows the number of runs he scored from 1994 to 2013 in his career of test matches. 700 58 623 1000 647 1088 575 1003 1392 153 915 444 267 776 1063 541 1558 756 357 276 a. Find the mean, median, and mode of these data. b. Which measure of center do you think is best here? Explain your answer.CHAPTER 3. 1) A national health survey measured the serum HDL cholesterol levels in a large number of women. Following is a sample of 36 HDL levels (in milligrams per deciliter) that are based on the results of that survey. They have been sorted into numerical order. 25 26 26 26 27 28 33 34 36 37 37 38 41 41 42 43 44 44 44 44 45 45 45 46 46 47 50 51 56 58 64 66 68 69 80 85 (a) Find the first and third quartiles. (b) Find the median of these data. (c) Find the upper and lower outlier boundaries. (d) Are there any outliers? If so, list them. 166. Doctoral Degrees Table 1.23 shows the number of doctoral degrees earned by Hispanic students for several years. Let x = 0 represent 1990, x = 1 represent 1991, and so forth. TABLE 1.23 Doctorates Earned by Hispanic Americans Year Number of Degrees 1990 780 2000 1305 2005 1824 2006 1882 2007 2035 Source: Statistical Abstract of the United States, 2010.
