1. You have a population of four (4) individuals A, B, C and D. A is 18 years of age, B is 20, C is 23 and D is 25. Calculate their average age There are six (6) possible combinations of samples of twa as follows: (A & B) i. ii. (A & C) (A & D) (В & C) (B & D) (C & D) Calculate the average age of each of the pair of samples above. iii. For each pair of sample in i (above) find the difference between the population mean (parameter) and the sample mean (sample statistic). iv. Compare the sample averages with the population mean and discuss your observation. 2. Describe how you can select a proportionate sample of 40 from a population of 160 students comprising 120 males and 40 females. Identify each of the following as either qualitative or quantitative and either discrete or continuous variable, by ticking under the appropriate column. QUALITATIVE QUANTITATIVE DISCRETE CONTINUOUS The number of bedrooms in Commonwealth Hall. The GDP of Ghana. The type of political system of a country (Democracy, Aristocracy, etc.) Access to clean water Public expenditures in basic education Number of days a week you read a newspaper Political party affiliation Discuss the qualities of "good" research

1. You have a population of four (4) individuals A, B, C and D. A is 18 years of age, B is 20, C is 23 and D is 25. Calculate their average age There are six (6) possible combinations of samples of twa as follows: (A & B) i. ii. (A & C) (A & D) (В & C) (B & D) (C & D) Calculate the average age of each of the pair of samples above. iii. For each pair of sample in i (above) find the difference between the population mean (parameter) and the sample mean (sample statistic). iv. Compare the sample averages with the population mean and discuss your observation. 2. Describe how you can select a proportionate sample of 40 from a population of 160 students comprising 120 males and 40 females. Identify each of the following as either qualitative or quantitative and either discrete or continuous variable, by ticking under the appropriate column. QUALITATIVE QUANTITATIVE DISCRETE CONTINUOUS The number of bedrooms in Commonwealth Hall. The GDP of Ghana. The type of political system of a country (Democracy, Aristocracy, etc.) Access to clean water Public expenditures in basic education Number of days a week you read a newspaper Political party affiliation Discuss the qualities of "good" research

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Description: N 2 46 al 3% É 1:55 AMinfs323.pdf1. You have a population of four (4) individuals A, B, C and D. A is 18 years of age, Bis 20, C is 23 andD is 25.Calculate their average agei.ii.There are six (6) possible combinations of samples of two as follows:(A

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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An end of year Mathematics exam for grade 11 students consists of two papers. Paper A and Paper B. The marks in both papers for 7 students are shown below. Student 1 Student 2 Student 3 Student 4 Student 5 Student 6 Student 7 63 55 48 50 55 75 92 66 Раper A Раper A 84 53 55 84 84 42 А. = 0.7098 + 0.8117x = 0.7098 + 0.8655x В. У - C. y = 0.6052 + 0.8117x D. y = 0.6052 + 0.8655x
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Bighorn sheep are beautiful wild animals found throughout the western United States. Let x be the age of a bighorn sheep (in years), and let y be the mortality rate (percent that die) for this age group. For example, x = 1, y = 14 means that 14% of the bighorn sheep between 1 and 2 years old died. A random sample of Arizona bighorn sheep gave the following information: x 1 2 3 4 5 y 15.8 17.3 14.4 19.6 20.0 Σx = 15; Σy = 87.1; Σx2 = 55; Σy2 = 1,540.45; Σxy = 272 (a) Find x, y, b, and the equation of the least-squares line. (Round your answers for x and y to two decimal places. Round your least-squares estimates to three decimal places.) x = y = b = ŷ = + x (b) Draw a scatter diagram for the data. Plot the least-squares line on your scatter diagram. (c) Find the sample correlation coefficient r and the coefficient of determination r2. (Round your answers to three decimal places.) r = r2 = What percentage of variation in y is…
Bighorn sheep are beautiful wild animals found throughout the western United States. Let x be the age of a bighorn sheep (in years), and let y be the mortality rate (percent that die) for this age group. For example, x = 1, y = 14 means that 14% of the bighorn sheep between 1 and 2 years old died. A random sample of Arizona bighorn sheep gave the following information: x 1 2 3 4 5 y 13.8 19.3 14.4 19.6 20.0 Σx = 15; Σy = 87.1; Σx2 = 55; Σy2 = 1554.45; Σxy = 274b) Find the equation of the least-squares line. (Round your answers to two decimal places.) ŷ = + x (c) Find r. Find the coefficient of determination r2. (Round your answers to three decimal places.) r = r2 = d) Test the claim that the population correlation coefficient is positive at the 1% level of significance. (Round your test statistic to three decimal places.) t =
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Bighorn sheep are beautiful wild animals found throughout the western United States. Let x be the age of a bighorn sheep (in years), and let y be the mortality rate (percent that die) for this age group. For example, x = 1, y = 14 means that 14% of the bighorn sheep between 1 and 2 years old died. A random sample of Arizona bighorn sheep gave the following information: x 1 2 3 4 5 y 15.8 17.3 14.4 19.6 20.0 Σx = 15; Σy = 87.1; Σx2 = 55; Σy2 = 1,540.45; Σxy = 272 (a) Find x, y, b, and the equation of the least-squares line. (Round your answers for x and y to two decimal places. Round your least-squares estimates to three decimal places.) x = y = b = ŷ = + x
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Let n=23 and consider the following information, Model One: Y = Bo + B1X, + B2X2 + B3 X3 + B4X, +e and R 90.62% Model Two: Y Bo + B1X1 + B2X2 + B4X4 + e and R2 = 82.55%, Model Three: Y = Bo+ B1X1 + B2X2 + B3X3 te and R2 Model Four: Y = Bo + B,X1 + B,X, +e and R? 86.85%, 81.19%. %3| Consider testing that Ho : B1 = B2 = B3 = 0. The value of the computed test statistic is Select one: O a. 74.45 O b. 41.83 Oc. 29.96 O d. 43.46
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