For each of the following investigations, state i) null hypothesis, ii) alternative hypothesis and iii) type of test, two sided/one sided. a) You wish to investigate if income from tobacco farming is greater than that of from tea farming in Malawi. b) You want to compare proportion of army worms killed by Doom those killed by Attack pesticide.

Q: Describe the difference in how observations are ranked in the Friedman test and in the…

A: Kruskal-Wallis test:The ranks are assigned to the observations by considering all observations.

Q: What is Simpson's paradox?

A: Simpson's paradox:- Simpson's paradox is also called as Yule-Simpson effect. Simpson's paradox is…

Q: A court holds jurisdiction over five counties, and the juries are required to be made up in a…

A: Solution To find the p value we will use z test for single proportion.

Q: Because of the complex nature of the U.S. income tax system, many people have questions for the…

A: given x= 105 n=180 p⏞=xn=105180=0.5833

Q: The state of Ohio conducted COVID19 tests on 68,811 people, and 8,533 tested positive. What is…

A: We can find the sample proportion as below

Q: A mayor running for re-election claims that during his term, average municipal taxes have fallen by…

A: Introduction A statistician wanted to test the claim of a mayor who claimed that taxes has…

Q: In the hypothesis-testing procedure, there is a single sample and a known population that is called

A: When there is a single population with known population, then it is called one sample z-test.

Q: 1. The amount of the sample weights (in kilograms) of the random student-athletes in Archangels…

A: Given: Mean(μ)=52standard deviation(σ)=8

Q: If the equality term in the null hypothesis involves ≤ or ≥, then which test would be appropriate?

A:

Q: 11) For a survey, individuals were asked if people with "extreme views" should be allowed to give…

A: (a)   State the hypotheses.   Let pM denotes the population proportion of all males Let pF denotes…

Q: 3. In the case of hypothesis testing of one sample (for large samples): If α value is greater than…

A: Solution

Q: What are the null and alternative​ hypotheses?

A: Let μ denotes the population mean time break between classes. The scheduled break between classes…

Q: Explain the purpose of Hypothesis Testing.

A: There are two aspects of Statistical Inference. One is Estimation and another is Hypothesis Testing.…

Q: What is the best way to answer each of the questions below: a survey, an experiment, or an…

A: Given: Are people generally satisfied with how things are going in the country right now? Survey is…

Q: I sort of understood the addition rule of probabilties, but cannot apply it. Any better explanation…

A: From the addition law of probability, we have,

Q: A newspaper article about the results of a poll states: "In theory, the results of such a poll, in…

A: Given:Confidence level = 0.99Z for 99% confidence level = 2.576 …using z-table

Q: Suppose we want to test the claim that  the proportion of Californians who prefer single-family home…

A: From the given information,   Claim: Suppose we want to test the claim that  the proportion of…

Q: A large fishing farm with thousands of fish has been treating its fish to stop a spreading fungal…

A: From the given information, A simple random sample of 150 fish is taken and a careful examination…

Q: A TV news reporter says that a proposed constitutional amendment is likely to win approval in the…

A: Part b: Given: Sample size, n = 425                        Sample proportion, p^ = 0.52…

Q: If the level of significance for a test for independency was 5% and the p-value was 0.03, what would…

A: Given,   P-value = 0.03 Level of significance = 0.05   The objective is to find the conclusion.

Q: 4. Suppose a political candidate claims the percentage of uninsured drivers is 30 percent, but you…

A: Rule of hypothesis : Null Hypothesis contain 'less than or equal to ( <= )' , 'greater than or…

Q: A mayor running for re-election claims that during his term, average municipal taxes have fallen by…

A:

Q: name the appropriate inference procedure, and write the hypotheses.

A:

Q: if four blue marbles and eight non blue marbels make a probabilyty of 0.33 how many non blue…

A: Given information 4 Blue marbles 8 Non-Blue marbles Probability of getting a blue marbles p = 0.33

Q: What would the correct hypothesis formulation be?

A: Given that, the student wants to study whether or not the new Economics professor will affect the…

Q: 3. Write the appropriate null and alternative hypothesis in symbols to determine if the proportion…

A: The null and alternative hypotheses of first example Ho:p=0.20H1:p≠0.20  Null hypothesis: THe…

Q: Write both the null and alternative hypothesis. Using the correct notation The proportion of…

A: Null Hypothesis (H0):It's an assertion regarding the population which is assumed to be true or is…

Q: A March 2021 Gallup poll asked a nationally representative sample of randomly selected U.S. adults…

A:

Q: 1.) Explain the process of Hypothesis Testing is.

A: Hypothesis testing is generally used when you are comparing two or more groups. Five Steps in…

Q: In research, it is not practical to include all members of a population. Is this true or false

A: Given statement: In research, it is not practical to include all members of a population.

Q: 24. Out of 3,000 unskilled workers of a factory, 2000 and out of 1200 skilled workers, 300 come from…

A: introduction - Method of proportion p'=xn where ,  x= Number of successes  n=sample size  p' =sample…

Q: Which of the elements of a test of hypothesis can and should be specified prior to analyzing the…

A: In the field of statistics, a hypothesis is a claim about some aspect of a population. A hypothesis…

Q: If a set of exam scores forms a positively skewed distributition, it suggest that the majortiy of…

A: A positively skewed (or right-skewed) distribution in statistics is a type of distribution in which…

Q: Define the Goal of hypothesis testing?

A: A statistical hypothesis is an assumption about a population parameter. Hypothesis testing refers to…

Q: It is known from experience that in a certain indus-try 60 percent of all labor–management disputes…

A: Let define the events as follows: The known probabilities are,

Q: 2. In the recent Census, three percent of the U.S. population reported being of two or more races.…

A:

Q: Make an infographic chart about solving problems in hypothesis testing.

A: Please find an infographic chart about solving problems in hypothesis testing below:

Q: Assume that a survey of 1009 Californians found that 549 of them favored Proposition 16. Find the…

A: Z test is one of the large sample tests, when the sample is 30 or more than 30we use this test. We…

Q: 1. A vote is to be taken among the residents of a town and the surrounding county to determine…

A:

Q: It Is the alm of the Department of Health(DOH) to glve measles vaccine to infants. When a barangay…

A: One sample proportion z test: One sample proportion z test is a hypothesis test that is used to test…

Q: As a general guideline, the research hypothesis should be stated as the O null hypothesis. tentative…

A: Null and alternative hypotheses: Null hypothesis: Null hypothesis is a statement which is tested for…

Q: e population of a city is made up of 2223 men and 7777 women. For an opinion survey, a STRATIFIED…

A: We know that the In the stratified sampling method, the sample is drawn on the basis of proportion…

Q: uman blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a…

A: Given data: The given table is, Blood Types A+ A- B+ B- AB+ AB- O+ O- Percent 35.9 6.3 9.5 1.5…

Q: or a population with σ = 24, how large a sample is necessary to have a standard error that is: Equal…

A: Given that,  = 24 (a) Standard error = 6  =  /  n 6 = 24 /  n n = 24 / 6 = 4 n = 16

Q: Ignoring radiologist experience, do pairwise comparisons using the Tukey HSD test and summarize the…

A:

Q: 4. What is your alternative hypothesis? (in word:

A: We have to determine the alternative hypothesis for correlation between x and y.

Q: Give introduction to Hypothesis Testing?

A:

Q: 9. If a population is concentrated on the elderly and has very little number of children, then the…

A: the given statement is, If a population is concentrated on the elderly and has very little number of…

Q: Two ad agencies want to understand issues that are important to students. Agency A will interview 50…

A: Agency A is selecting 50 random students from school enrollment data Agency B is selecting 50…

Q: A mayor running for re-election claims that during his term, average municipal taxes have fallen by…

A: Point estimate : In statistics, purpose estimation is that the method of estimating associate degree…

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.