OK8.17 To emphasize safety, a taxicab company wants to estimate the proportion of unsafe tires ontheir 175 cabs (Ignore spare tires.) Selecting a simple random sample of tires is imprac-tical, so cluster sampling is used, with each cab as a cluster. A random sample of 25 cabsgives the following number of unsafe tires per cab:2, 4, 0, 1, 2, 0, 4, 1, 3, 1, 2, 0, 1, 1, 2, 2, 4, 1, 0, 0, 3, 1, 2, 2, 1Estimate the proportion of unsafe tires being used on the company's cabs and place abound on the error of estimation.

Sample size: Sample observations of number of unsafe tires in each of the sampled cabs is given as:…

Answered: OK 8.17 To emphasize safety, a taxicab…

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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15.
Consider the patient data in the table below.Suppose that patients are randomly selected withreplacement from the total for hospital 4.What is the smallest sample size needed so that theprobability is at least 90% that at least one patient isLWBS?
Question 6 I am stuck between cluster and stratified for the answer. Need help with this problem. Identify which of these types of sampling is used: random, stratified, systematic, cluster, convenience. A market researcher selects 500 drivers under 30 years of age and 500 drivers over 30 years of age. Question 6 options: Cluster Stratified Convenience Systematic Simple Random
A local nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use 2.2 hours of labor time for planting of a medium-sized tree. A random sample of 36 tree plantings is selected and the planting times are recorded. The average planting time for the sample of 36 planting is 2.7 hours with a standard deviation of .9 hours. The researcher wants to test if the average planting time is significantly greater than 2.2 hours based on the data that was collected. Họ: H= 2.2 H1: u> 2.2 What is the value of the Test Statistic for this hypothesis test? Round Z to the 100ths place.
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In a study comparing banks in two countries, a sample of 142 matched pairs of banks was formed. Each pair contained one bank from country x and one from country y. The pairings were made in such a way that the two members were as similar as possible in regard to such factors as size and age. The ratio of total loans outstanding to total assets was calculated for each of the banks. For this ratio, the sample mean difference (country x - country y) was 0.0579, and the sample standard deviation of the differences was 0.3086. Test, against a two-sided alternative, the null hypothesis that the two population means are equal. (Assume α = 0.01.) Click the icon to view the critical values of the Student's t distribution. The test statistic is t = 2.236. (Round to three decimal places as needed.) The critical value(s) is(are) (Round to three decimal places as needed. Use a comma to separate answers as needed.)
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