STATISTICS• Two independent variables X and Y areset by the tablesx -3 15 yi 2 4pi 0,1 0,6 ppi 0,4 0,6Find1. Mean values ux, µY, variances.22. The distribution tables for randomvariables W = 2X+Y, Z = X Y.%3D3. Mean values and variances for both Wand Z by the distribution tablesaccording to their properties.

given: Probability distributions of X and Y X and Y are independent variables

Answered: • Two independent variables X and Y are…

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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Suppose the number of off springs a female eagle raises during its lifetime has a distribution with mean 18 and variance 4. In an area, 45 rescued and cured female eagles are set free. If these eagles are assumed to be independent (no lack of male partners and food resources), the total number of off-springs produced by these eagles can be assumed to have a Normal distribution with mean and variance pus NEXT Save
Th aim of a study is to test the ratio of variances in the weight of two groups of rats being under a certain drugs A ( group 1) and B ( group 2). A random sample of 16 rats was selected from group 1and 13 rats from group 2, Then their weight were recorded. The results are shown in the following table d Median Mean n 1.05 30 35 16 group 1 1.15 2.0 2.20 13 group 2 F19,16,0.025 0.386 FE12005 = 0.404 /16.100.026 =0..335 Foi6o 0451 151201=0190 F16.10.0L05 = 0.401. !! ZI6inai2s-0.371 FR15005= 0.382 F'0.16,0025 =0,286 Ik190.000.437 F21501=0,475|| 1u,16 005 – 0.354 Construct a 95% confidence interval for the ritio ihe väran s THint because of the rounding select the closest interval (0.318 2063 a0 None of thesEb
A national freight delivery service is considering introducing a same-day delivery service at no extra cost. It randomly selected customers in its business areas and recorded the customer satisfaction scores. The score range is between 1-100, where 100 is the highest customer satisfaction. Define X1 as the satisfaction score with ordinary deliveries and X2 as the satisfaction score for the same customers with same day deliveries. Some summary statistics are given as The sample mean of X1 is The sample variance of X1 is The sample mean of X2 is The sample variance of X2 is The sample covariance between X1 and X2 is The sample size is 44.20 142.75 53.86 103.39 81.43 56 If you were to carry out a test to investigate whether outsourcing may improve customer satisfaction, what would your sample size be?
A simple random sample of 100 water meters within a community is monitored to estimate the average daily water consumption per household over a specified dry spell. The mean and variance for this sample are 12 and 1250, respectively. If we assume that there are N= 1000 houscholds within the community, and the maximum and minimum water consumption values per household are 23 and 3 respectively, estimate the true mean of daily water consumption.
A group of 5 patients treated with medicine. A is of weight 42,39,38,60 &41 kgs. Second group of 7 patients from the same hospital treated with medicine B is of weight 38, 42, 56, 64, 68, 69, & 62 kgs. Find an estimate of the 'pooled variance' S2,, which estimates the common variance o 2 Round off all sub answers 2 decimal places and final answer to 1 decimal place Answer:
In a regression line of Y on X, the variable Y is know as random variable dependent variable qualitative variable independent variable
How is it that estimates of variance can be used to test a hypothesis about means?
please be clear
A sample of 3 measurements are taken and recorded: a =8, y = 10 and z = 7 The sample mean is: x = = 8.33 Fill in the table below. aj (a; - x)2 Ex: 5.34 Ex: 5.34 Ex: 5.34 82 = (z-z)*+(y-a)* +(z-z) Ex: 5.34 (z-2)*+(y-z)* +(z-) = Ex: 5.34
Birth weight at a local hospital for the past year had a normal distribution with a mean of 106 ounces and a variance of 36 ounces2. If the middle 50% of the birth weights are considered to have a normal birth weight then what is the birthweight that defines a high birthweight baby (above normal)?

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