Suppose a population of size N = 160 is stratified into two regions according toWi = 0.5625 and W2 = 0.4375 with Hz.1 = 6 and Hz2 = 6.5. Samples of size n = 10 and n2 = 8 arecollected from each population. The values in each sample are given in the table below.1.Sample 1х у5.38 17.02 11.03 40.95Sample 2_y0.421.217.35 26.624.94 16.313.0811.302.54 6.6910.23 36.718.89 29.192.809.525.97 20.452.569.117.94 26.233.44 12.948.57 26.54 11.52 40.743.77 13.119.84 32.68a. Use separate ratio estimation to estimate the population mean for this population.b. Compute an estimate of the variance of the estimator used in a.c. Use combined ratio estimation to estimate the population mean for this population.d. Compute an estimate of the variance of the estimator used in c.e. Is the separate ratio estimator more efficient than the combined ratio estimator? Explain.f. Comment on the validity of the ratio estimation approach for each strata. Use appropriateillustrations to aid vour answer.

sample 1 sample 2 x y x y 5.38 17.02 11.03 40.95 0.42 1.21 7.35 26.62 4.94 16.31 3.08 11.3…

Answered: Suppose a population of size N = 160 is…

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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B. Samples of size n were randomly selected from populations with means and variance given below. In each case, find the mean and variance of the sampling distribution of the means. 1. n= 4 2. n= 4 3. n= 4 4. n= 5 5. n = 6 議 µ = 5.5 µ = 7.5 p = 8.5 p = 15 H = 20 2 = 25 2 = 9 0? = 16 {? = 30 0? = 36
Maryland, as the four U.S. cities with the highest percentage of millionaires (Kiplinger website). Consider a sample of data that show the following number of millionaires for samples of individuals from each of the four cities. Millionaire Cannot conclude Bridgeport, CT CA San Jose, CA Yes 42 36 No 458 264 a. What is the estimate of the percentage of millionaires in each of these cities (to 1 decimal)? 0.436 Use Table 3 of Appendix B to find the p-value. The p-value is greater than 0.10 What is your conclusion? City Washington, D.C. 35 365 Bridgeport, San Jose, Washington, Lexington Park, CT D.C. MD Lexington Park, 46 27.4 Percentage, % 36.5 b. Using a = 0.05 level of significance, test for the equality of the population proportion of millionaires for these four cities. What is the p-value? Compute the value of the x² test statistic (to 3 decimals). 36.5 MD 33 367 that there is a difference among the population proportion of millionaires for these four cities.
1. A researcher plans to conduct a survey among students in a public high school. If the population of thisschool is 5,000, find the sample size and the percentage from the N population. (Margin of error is 5%)A = {9,10,11,7,13}B = {10,10,10,10,10}C = {1,1,10,19,19}a. Calculate the mean of each data set.b. Calculate the standard deviation of each data set.c. Which set has the largest standard deviation?
Determine the sample size if o = 6, population mean = 25, sample nean = 23 and the desired degree of precision is 99 per cent. Sta olds
Q1-5: Given the following data from a sample of sizen= 7 12 7 49073 The third qoartile is: Select one: O a. 4 O b. 7 O c. 8 O d. 9
Calculate the 1. Population and sample skewness, add interpretation 2. Exact and excess sample kurtosis, add interpretation
the dataset provides information on temperature change in some provinces from china. Analyze it using SPSS and conduct any tests
Suppose the true population proportion is p = 0.5. The figure below shows the distribution of the sample proportion (p) values for 3 different sample sizes, n = 20, n=100 and n=500. 0.2 0.4 0.6 0.8 0.2 0.4 0.6 0.8 0.2 0.4 0.6 0.8
Determine Px and ox from the given parameters of the population and sample size. μ = 62, o = 24, n = 35 = ...
The gasoline price often varies a great deal across different regions across country X. The followingdata show the price per gallon for regular gasoline for a random sample of gasoline service station forthree major brands of gasoline (A, B and C) located in 10 metropolitan areas across the country X.A B C3.77 3.83 3.783.72 3.83 3.873.87 3.85 3.893.76 3.77 3.793.83 3.84 3.873.85 3.84 3.873.93 4.04 3.993.79 3.78 3.793.78 3.84 3.793.81 3.84 3.86a. State the null and alternative hypothesis for single factor ANOVA to test for any significantdifference in the mean price of gasoline for the three brands.b. State the decision rule at 5% significance level.c. Calculate the test statistic. d. Based on the calculated test statistics decide whether any significant difference in the meanprice of gasoline for three bands.
The contents (in ml) of a sample of 18 bottles of locally distributed premium essential oils are given. 0.68, 1.29, 0.93, 1.02, 0.74, 1.43, 1.29, 1.20, 0.68, 1.46, 1.33, 1.14, 1.33, 1.46, 0.74 1.33, 1.02, 0.93. The midrange isA. 1.055B. 1.070C. 1.100D. 1.14

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