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- The following temperatures (in oF) were recorded inside the building of a remote pumping station: 99, 87, 93, 90, and 96. The variance of these readings is closest to: (a) 11.7 (b) 22.5 (c) 31.1 (d) 38.6Find the range, variance and standard deviation of the ff 10, 17, 15, 20, 13, 11, 19, 12, 14, 16 Excel form need answersCalculate SP (the sum of products of deviations) for the following scores, Note: Bothmeans are decimal values, so the computational formula works well.X Y0 41 10 54 12 11 3
- 2 The sample variance is _______. a 8285.94 b 9469.64 c 10521.83 d 11690.92TRUE OR FALSE. When heterosdasticity is present OLS estimators are still BLUE.SCCoast, an Internet provider in the Southeast, developed the following frequency distribution on the age of Internet users. Find the mean and the standard deviation. (Round squared deviations to nearest whole number and final answer to 2 decimal places.) Age (years) Frequency 10 up to 20 3 20 up to 30 7 30 up to 40 18 40 up to 50 20 50 up to 60 12
- 25) Consider the estimated equation from your textbook = 698.9 - 2.28STR, R2 = 0.051, SER = 18.6, Corresponding standard errors of coefficients are as such: SE (698.9) = 10.4 SE (-2.28) = 0.52 The absolute value of t-statistic for the slope is approximately: A. 67.20 B. 1.76 C. -4.38 D. 0.52The average amount of debt families have is 2.5 times their annual income with a standard deviation 0.75 times their annual income. How much debt does a family have to have (relative to their annual income) to be in the top 5% with the LOWEST debt load?DEPENDENT VARIABLE Qc R- SQUARE P- VALUE ON F 64 0.8093 0.0001 INDEPENDENTVARIABLE PARAMETER ESTIMATE STANDARD ERROR T-RATIO P-VALUE INTERCEPT 8.20 4.01 2.04 0.0461 PC -3.54 1.64 -2.16 0.0357 M 0.64287 0.19 3.38 0.0014 PA 0.7854 0.38 2.07 0.0439 6. If tax revenue per capita (M) increases by 10, what will happen to the estimated quantity of cement demanded? Q = f( P, M, PR) where Qc = demand for cement/month (in yards) Pc = the price of cement per yard, M = country’s tax revenues per capita, and PR = the price of asphalt per yard.
- Calculate standard deviation Marks: 0-10,10-20,20-30,30-40,40-50 Frequency :10,15,10,10,5The state of California has a mean annual rainfall of 22 inches, whereas the state ofNew York has a mean annual rainfall of 42 inches (Current Results website, October 27,2012). Assume that the standard deviation for both states is 4 inches. A sample of 30 yearsof rainfall for California and a sample of 45 years of rainfall for New York has been taken.a. Show the probability distribution of the sample mean annual rainfall for CaliforniaA total of 280 observations of Bob Ramos, an assembly-line worker, were made over a 40-hour work week. The sample also showed that Bob was busy working (assembling the parts) during o 230 bservations. (Round all intermediate calculations to at least two decimal places before proceeding with further calculations.) The number of observations that need to be taken of Bob to be 99% confident with 4% acceptablee error=