Let's say we want to do a 2 sample t-test and we want to know if the difference between groups 1 and 2 is zero or not.What are the null and alternate hypothesis?

Let's say we want to do a two sample t-test and we want to know if the difference between groups 1…

Answered: Let's say we want to do a 2 sample…

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 that a scientist is interested in determining if the proportion of females who prefer Diet Coke to regular Coke is higher than the proportion of males who prefer Diet Coke to regular Coke. They randomly sample 219 people and ask them if they prefer Diet to regular and also record if they are a male or female. Does this experiment meet the conditions to use the two-sample proportions method? No since one of the variables is quantitative Yes since both variables are categorical with two categories. No since one of the categorical variables has more than two categories.
Suppose in one sample hypothesis test, if the test statistic value is -1.09 and the table value is 1.96 then we will O a. accept the alternate hypothesis O b. accept null hypothesis
pls send me answer of this question with explanation in details and i will rate you sure sir. A group of college students believes the average grades in psychology courses are different than the average grades in biology courses. The group found the average psychology grades of a sample of 11 students was 84.4 and the average biology grades of a sample of 11 students was 78.2. What is the null hypothesis for this study?
george works at a local icecream shop . He samples 200 customers . He finds out that 120 use a debit card and the rest of them use cash . Also, 50 customers get vanilla icecream . Of those , 30 got vanilla iccream and used debit cards Find the probabilty that a randomly sampled person either uses a debit card or does not get a vanilla icecream
If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make if ZSTAT = -0.76? If you use a 0.05 level of significance in a two-tail hypothesis test, what decision will you make if ZSTAT = +2.21? If you use a 0.10 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting a null hypothesis that the population mean equals 500 if you use the Z test? If you use a 0.01 level of significance in a two-tail hypothesis test, what is your decision rule for rejecting H0 : m = 12.5 if you use the Z test? What is the p-value if, in a two-tail hypothesis test, ZSTAT = +2.00? What is the p-value if, in a two-tail hypothesis test, ZSTAT = -1.38?
An instructor is interested in knowing whether a recent exam is viewed by the students as fair. There are 40 students in the class. The instructor received the opinions of 3 students who remained after class one day to complain about the exam. (a) What is the population for this study? (b) What is the sample? (c) Is the sample a random sample? Explain why or why not. (d) Do you think that the instructor should conclude that the opinions of the 3 students who remained after class represent those of the entire class? Explain why or why not.
A statistics instructor who teaches a lecture section of 160 students wants to determine whether students have more difficulty with one-tailed hypothesis tests or with two-tailed hypothesis tests. On the next exam, 80 of the students, chosen at random, get a version of the exam with a 10-point question that requires a one-tailed test. The other 80 students get a question that is identical except that it requires a two-tailed test. The one-tailed students average 7.79 points, and their standard deviation is 1.06 points. The two-tailed students average 7.64 points, and their standard deviation is 1.31 points. a) Can you conclude that the mean score μ1 on one-tailed hypothesis test questions is higher than the mean score μ2 on two-tailed hypothesis test questions? State the appropriate null and alternate hypotheses, and then compute the P-value. b) Can you conclude that the mean score μ1 on one-tailed hypothesis test questions differs from the mean score μ2 on two-tailed hypothesis test…
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If the decision in a hypothesis test said to reject Ho, then we can always make a conclusion that the sample data supports the claim. True False
A researcher selects a sample of 20 participants and makes the decision to fail to reject the null hypothesis. She conducts the same study testing the same hypothesis with a sample of 100 participants and makes the decision to reject the null hypothesis. Give a likely explanation for why the two samples led to different decisions.
Is the hypothesis above a one-tail or a two-tail hypothesis?
3. Discuss the basic procedure in making inferences on two samples and give a situation where you can apply it.

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Let's say we want to do a 2 sample t-test and we want to know if the difference between groups 1 and 2 is zero or not. What are the null and alternate hypothesis?