12. Calculate the expected life of refrigerators at the age of 7 using the following data. Age: up 2 2-4 4-6 6-8 8-10 10-12 Girls: 5 16 13 7 4
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- U.S. Civilian Labor Force (thousands) Year Labor Force Year Labor Force 2007 153,918 2012 155,628 2008 154,655 2013 155,151 2009 153,111 2014 156,238 2010 153,650 2015 157,957 2011 153,995 2016 159,640 1. Fit three trend models: linear, exponential, and quadratic. Which model would offer the most believable forecasts? 2. Make forecasts using the following fitted trend models for years 2017-2019. t Exponential 11 12 139. Find Lower quartile, Median, Upper quartile, 6th decile, 95th percentile, 4th quartile from the following data. Classes 32 Frequency 3 30- 32- 34- 36- 38- 40- 42- 44- 46- 48- 40 38 50 31 42 44 34 36 24 46 48 50 21 38 12 2 61The number of adult Americans who smoke continues to drop. The table contains estimates of the percentages of adults (ages 1818 and over) who were smokers in the years between 1965 and 201715.and 201715. ???? ?Year � ??????? ?Smokers � 1965 41.94 1970 37.4 1974 37.1 1978 34.1 1980 33.2 1983 32.1 1985 30.1 1987 28.8 1990 25.5 1993 25.0 1995 24.7 1997 24.7 1999 23.5 2001 22.8 2002 22.5 2004 20.9 2006 20.8 2008 20.6 2010 19.3 2012 18.1 2014 16.8 2017 14.0 According to your regression line, how much did smoking decline per year during this period, on the average? Give your answer to three decimal places. average smoking decline: percentage points
- The data is as follows: 2 0's, 6 1's, 10 2's, 32 3's, 50 4's, 69 5's, 50 6's, 38 7's, 19 8's, 12 9's, and 4 10's.When you use data from a published source (you do not collect it yourself) you are using O primary data O secondary data O time series data cross sectional data O census datait is assumed that a production process may produce some defective items. it is found that 12 item are defective out of 100 randomly selected items. What is the point estimate of the population production of non-defective item of this production process? a. 0.12 b. 0.92 c. 0.08 d. 0.88
- Asian economies impact some of the world's largest populations. The growth of an economy has a big influence on the everyday lives of ordinary people. Are Asian economies changing? A random sample of 15 Asian economies gave the following information about annual percentage growth rate. Region 1 2 3 4 5 6 7 8 Modern Growth Rate % 4.4 2.9 7.6 2.4 0.9 5.5 2.5 4.8 Historic Growth Rate 3.1 1.7 7.2 5.3 3.7 6.4 3.4 8.8 Region 9 10 11 12 13 14 15 Modern Growth Rate % 4.3 5.2 6.5 3.8 3.4 0.2 7.5 Historic Growth Rate 6.6 7.8 6.2 1.9 1.2 2.9 5.3 Does this information indicate a change (either way) in the growth rate of Asian economies? Use a 10% level of significance. Compute the sample test statistic. (Round your answer to two decimal places.) Find the P-value of the sample test statistic. (Round your answer to four decimal places.)An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. Data was collected from 229 students. Can we conclude that freshman housing location and academic performance are related? Location Average Below Average Above Average Total On campus 92 48 42 182 Off campus 23 11 13 47 Total 115 59 55 229 Copy Data Step 3 of 8: Find the expected value for the number of students that live off campus and have academic performance that is below average. Round your answer to one decimal place. E Tables E Keypad nswer ow to enter your answer Keyboard Shortcuts Previous Step Answers POff campus and below averageGive the statistical meaning of the relationship between the spending hours on using mobile andreading books per day.
- 9 The table below shows the weights of 8 different bears at a zoo. Type of Bear Asiatic Black Bear Black Bear Brown Bear Panda Bear Polar Bear Sloth Bear Spectacled Bear Sun Bear Weight (pounds) 225 300 550 200 1,000 300 280 100 If the weight of the polar bear is removed, which statement is true? A The mean decreases more than the median because the polar bear is a high outlier. The mean decreases less than the median because the polar bear is a high outlier.Q1) Case Study A survey was conducted to research the question whether more home runs are hit by players in the National League or by players in the American League. A Researcher decide to use the home run leaders from each league for a 40-year period as data. The numbers are shown. [6] National League 47 49 73 38 50 40 65 47 70 49 47 40 43 36 46 35 39 49 37 37 40 37 31 48 48 45 52 38 38 52 36 44 40 48 45 45 36 39 44 47 American League 47 57 52 47 48 56 56 52 50 40 46 43 39 44 51 36 42 49 49 40 43 32 39 22 41 45 46 39 32 36 32 32 37 33 44 49 44 44 49 32 (i) Define a population (ii) what kind of sample was used (iii) do you feel that it is representative (iv) what are your hypotheses? (v) what significance level will you use? (vi) what statistical test will you use? (vii) what are the results? (Assume sigma1 = 8.8 and sigma2=7.8) (viii) 95% CI? (ix) Decision (x) Conclusion (xi) Do you feel that using the data given really answers the original question asked? (xii) what other data might…
