NumberStylesH.KMThe South African government is concerned about the high illiteracy rates amongst adults in South Africa.They wish to estimate the true proportion of adults (over 18 years of age) in South Africawho are illiterate (that is, that cannot read or write in at least one language).A random sample of 10 000 adults were interviewed, and 1 107 of them were found to be illiterate.Using information from the given scenario above determine the following:(1.1) Type of data(1.2) Population size(1.3) Literate adults(1.4) Sample size(1.5) Iliterate rate(1.6) Variable

The type of data used in the problem is Interval type as there is no absolute zero in the data but…

Answered: The South African government 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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3) A Chi-square test can be done to test all of the following EXCEPT which of the following? If the mathematical model accurately predicts the pattern of data values observed. If the mathematical model accurately predicts the total number of values observed. If traits exhibit independence with regards to the probability of seeing their combinations in individuals in a population. If individuals from different populations have the same probability of possessing various traits. If the mathematical model accurately predicts the proportions of data values observed.
5.
1. If you wanted to conduct a survey to determine the mean shoe size of American adults, how could you collect the data to ensure that you had a simple random sample?
9. An article in the Philippine Daily Inquirer discusses the dangers of obesity. The article claims that in the middle managerial positions, obese people get (on average) smaller paychecks than non-obese people. Suppose that you want to test this claim, and you have obtained the following two random samples of employees (data are in thousands of pesos per month): Obese: 45 54 39 67 33 62 39 50 48 51 37 61 70 35 42 40 Non-obese: 54 69 36 77 56 30 72 80 44 73 55 60 49 Test the hypothesis using the 0.05 level of significance.
1. A researcher uses a one-sample t-test to test a sample mean based on 27 scores against a hypothesized population mean. What is the degrees of freedom for this t-test? A. 26 B. 28 C. 29 D. 27 2. If a researcher takes a large enough sample, he/she will almost always obtain: A. consequentially significant results B. virtually significant results C. practically significant results D. statistically significant results
Dr. Kijowski is concerned about student phone use, so she collects information on the number of text messages that each student sent on a particular day. The boxplot below shows the results. Based on the boxplot, which of the following is the most reasonable conclusion? a. There are more people with data values below the median than there are people with data values above the median. Selected:b. There are more people with data values between the first quartile and the median than there are people with data values between the median and the third quartile.This answer is incorrect. c. There are fewer people with data values between the first quartile and the median than there are people with data values between the median and the third quartile. d. There are approximately the same number of people with data values between the first quartile and the minimum as there are people with data values between the third quartile and the maximum. e. The data are less spread out between the…
Suppose the manager of a shoe store wants to determine the current percentage of customers who are males. How many customers should the manager survey in order to be 92% confident that the estimated (sample) proportion is within 8 percentage points of the true population proportion of customers who are males? z0.10 z0.05 z0.04 z0.025 z0.01 z0.005 1.282 1.645 1.751 1.960 2.326 2.576 Use the table of values above.
Consider a researcher who is exploring new potential treatments for specific forms of cancer. This researcher is extremely focused on avoiding mistakes in concluding that treatments that may very well be effective are ineffective when conducting their research. What should this researcher do? a. set a higher alpha level b. set a higher sample mean c. set a lower alpha level d. set a lower sample mean
1. A dog groomer is often asked if small dogs bark more than larger dogs. To test this, he logs the number of separate barking episodes per day for three size dogs: small, medium, and large. In a separate file you will find the number of barking episodes for 12 dogs. On average, small dogs barked the most Mean: 7.25 On average, medium sized dogs barked the least Mean: 2.75 A. Do the different size dogs bark a significantly different number of times? Test with an α = 0.05. B. If appropriate, use Tukey’s HSD post hoc test and report where the differences are. If inappropriate, state why. C. Calculate and interpret the effect size.
1. Americans consume an average of 70 hot dogs per year. A researcher is skeptical of that value and randomly samples 600 people and computes a sample mean of 68.3 hot dogs. a. Which value above is a parameter and which is a statistic? b. If tomorrow you were going to sample 60 people, around what value do you think the sample mean will be? Do you think it will be exactly that value?
Administrators are certain about the effectiveness of the Clearwater Preschool spelling program. The average spelling score is 28 for children of comparative age. The data below are spelling scores from a sample of children from Clearwater Preschool. Scores range from 0 - 40 with higher scores indicating better spelling. What can be concluded with an α of 0.05? A)What is the population? B)What is the sample?

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