in General a t-test is a mesure of 1)a difference in variances, relative to sample size 2) a difference in means, relative to sample size 3) a difference in means, relative to difference in population means 4) a difference in means, relative to natural variblity

in General a t-test is a mesure of 1)a difference in variances, relative to sample size 2) a difference in means, relative to sample size 3) a difference in means, relative to difference in population means 4) a difference in means, relative to natural variblity

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: A problem with a phone line that prevents a customer from receiving or making calls is upsetting to…

A: Claim : The mean waiting time at Central Office I is different with that at Central Office II.

Q: It stated that there is significant difference between the observed and expected data A. Alternative…

A: Hypothesis :- The statement about population conducting the study design is called as a hypothesis…

Q: A one-way between subjects analysis of variance should be used instead of a one-way within subjects…

A: Anova is used to measure the mean significance between groups. It compares three or more independent…

Q: When the One-Way Analysis of Variance (ANOVA) result is significant, that is, the null hypothesis…

Q: What does sample variance measures in F test?

A: F-test is used to test whether the observations in two groups have same variability. Let X1, X2, …,…

Q: GROUP 8 手 4 12 12 76 704 17 45 53 205 O mean 2 x 205 53 Mean" 3.17 (ntan 3 87 n(n) S7 (53 1.05

Q: What is the distinction between independent and dependent samples in hypothesis testing involving…

A: The objective is to determine the distinction between independent and dependent samples in…

Q: What are the hypotheses?

A: The objective is to set up the hypotheses in order to validate the claim that if the average amount…

Q: Find the difference between the mean heights, the t-statistic, and the p-value associated with the…

A: Hey, since there are multiple subparts posted, we will answer first three subparts. If you want any…

Q: The data from an independent-measures research study produce a sample mean difference of 4 points…

Q: (a) State the hypotheses and identify the claim. H " not claim H claim This hypothesis test is a…

A: As per our guidelines, we are allowed to answer first three sub-parts only. Thanks Population…

Q: If the variance of the Electrical Engineering board examination result is 36, what is the minimum…

Q: illustrates the effect of the standard deviation & the type of test (one-tailed or two) on the…

A: Given that, Power of a hypothesis test: The probability of not committing a Type II error is called…

Q: How is the analysis of variance (ANOVA) specifically the F-Test, a signal to noise ratio?

A: ANOVA is a study which is non parametric. ANOVA stands for "Variance Analysis" and is used to…

Q: xplain the difference between the t-test and the analysis of variance (ANOVA) and provide an example…

A: Introduction - t-test - A t-test is a type of inferential statistic used to determine if there is…

Q: How does the denominator of the F-ratio differ for a repeated-measures analysis of variance compared…

A: Analysis of Variance (ANOVA) is a method used to measure the causes of variability in the data by…

Q: A pooled variance estimate is useful for two-sample hypothesis tests of a normal mean when the…

A: It is given that the population variances are equal.

Q: For tests of Homogeneity of Variance the preferred outcome is to reject the Null hypothesis. True…

Q: Which survey is likely to give a more accurate view of working "women's opinions on job…

A: Here examined the difference in health of American adults from age 18-64 hwo have health insurance…

Q: Two machines are used to fill 25 kg bags of dog food. Sample information for these two machines is…

A: Provided data is, two machines are used to fill 25 kg bags of dog food. Sample information is:…

Q: 1. How do you know whether to use an independent-samples or paired-samplest test? 2. Why do we use a…

A: According our policy we can answer only first part for remaining please repost the question.

Q: What is the difference between t-Test: Two-Sample Assuming Unequal Variances and t-Test:…

A: Assumptions about t -test : i. The random variable x follows normal distribution or the sample is…

Q: Why is the unbiased estimator of variance used?

A: the unbiased estimator of the population variance, corrects the tendency of the sample variance to…

Q: 1.Explain why there is a potential problem in the ANÓVA analyses when the variances are not equal.…

A: ANOVA (ANALYSIS OF VARIANCE)…

Q: A researcher who wanted to understand whether there was a significant difference between the average…

A: b=3, n-1=14 and n-1=14, n=15 We want complete the ANOVA table and test the hypothesis

Q: A study was conducted to examine whether the perception of the quality of service at 5-star hotels…

A: From the provided information,

Q: For an analysis of variance, "two-way" refers to the direction that traffic should follow on the…

A: In this case, we need to identify the correct option for the given statement.

Q: c) Check whether the assumptions of normality and variance equality are satisfied for part b of this…

A: From part (b) p-value = 0.0000, which is less than alpha that is the level of significance. We…

Q: If the mean and variance are computed for each sample in an independent-measures two-factor…

A: The mean and variance are computed for each sample in an independent-measures two-factor experiment.

Q: A researcher wants to examine the effects of sex (male/female) and level of education (no college…

A: Given: Independent factor 1. Sex (Male and Female) 2. Level of Education (No college…

Q: .A gas station wants to compare a group of consumers' overall perceptions of service with overall…

A: Test Statistic A test statistic is a value derived from a statistical hypothesis test. It evaluates…

Q: is take for one-way between-subjects analysis of variance? Why can’t it be summarized in a single…

A: The amount of variation among the sample means or the variation attributable to the difference among…

Q: Describe research situation to illustrate the use of the One-way Analysis of Variance and one…

A: Assumptions of One-way analysis of variance (ANOVA) : 1] Samples are randomly selected. 2] Variance…

Q: When performing follow-up tests after Analysis of Variance, the problem of multiple comparisons must…

A: Given information: When performing follow-up tests after Analysis of Variance, the problem of…

Q: How does sample variance influence the estimated standard error and measures of effect size such as…

A: Standard error is always a multiple of sample variance where the multiple is a function of sample…

Q: A pooled variance estimate is useful for two-sample hypothesis tests of a normal mean when the…

A: Solution: The given statement is “A pooled variance estimate is useful for two-sample hypothesis…

Q: The sum of squared of deviations of sample Mean is 48 and total number of observation is 13 then…

A: Given, The sum of squared of deviations of sample mean is 48 and total number of observation is 13.…

Q: Find interquartile range for mileage data and value of variance

A: It is given that a sample of 9 cars, in hundreds of dollars is 10, 6, 8, 10, 5, 3.5, 7.5, 7, 9.5

Q: True or false: The P-value is the smallest significance level for which the observed sample data…

Q: If other factors are held constant, increasing the sample variances will have very little influence…

A: Effect size : The size of the effect indicates how significant the association between variables or…

Question

in General a t-test is a mesure of

1)a difference in variances, relative to sample size

2) a difference in means, relative to sample size

3) a difference in means, relative to difference in population means

4) a difference in means, relative to natural variblity

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

Expert Solution

notes

t test is used when sample size is small and population sd is unknown.

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

A large company that produces allergy medications claims that Americans lose an average of 40 hours of work to problems related to seasonal allergies. A consumer advocacy group believes that company's claim exhibits self-interest bias. In other words, the advocacy group believes that the actual mean number of missed hours is less than claimed. The advocacy group would like to obtain statistical evidence about this issue and takes a random sample of 100 American workers. They find that these 100 people lost and average of 38 hours due to seasonal allergy symptoms. The standard deviation is 9.5 hours. (c) Based on your selection from part (b), what is the value of the standardized test statistic for this significance test? (d) Based on your selection from part (b), what is the P-value for this significance test? (e) What is the correct decision for this test, using a 0.05 level of signifcance? A) Reject the null hypothesis B) Do not reject the null…
True or false: The point estimate for the population mean of an xdistribution is computed from a random sample of the xdistribution.
What is Pooled Variance Estimate?
True or False: In order to perform an analysis of variance (ANOVA), the response variable must be quantitative.
Provide one sample problem of Analysis of Variance (ANOVA)
In a comparison between the mean waiting time of the patients in the hospitals of Giza and Alexandria governments the minister of Health randomly selected 60 hospitals from Giza government and their mean waiting time was 30 minutes and the previous reports showed that the variance was 10 minutes. Also a sample consist of 50 hospitals from Alexandria governments was selected and their mean waiting time of this sample was 15 minutes and from previous reports the variance was 5 minutes. 1-Construct the 95% C.I for the difference between the average waiting time in Giza & Alex2- Without any computations, discuss fully and precisely what will happen to the results you obtained in part (1) if the confidence level changed to be 99% instead of 95%. Give the reason for your answer
If, in an analysis of variance, you find that MSTR is greater than MSE, why can you not immediately reject the null hypothesis without determining the F ratio and its distribution? Explain.
If the variance of Aeronautical Engineering board examination results is 144, what is the minimum number if takers needed to estimate the population mean with 95% confidence using a margin of error of 0.80.
How would I construct a two-way ANOVA model with interaction by hand with the statistical program's output available to me? Would it look like a formula or a chart? The outputs I am looking at are a summary of fit, analysis of variance, effect test, level means differences
use the math problem uploaded to answer the question. Will you reject or fail to reject the null hypothesis? choose one: a) The P-Value is greater than the level of significance and so we reject the null hypothesis that the variances are equal. At 0.05 level of significance, we conclude that the variance for the first plot is greater than the variance for the second plot. b) The P-Value is greater than the level of significance and so we fail to reject the null hypothesis that the variances are equal. At 0.05 level of significance, we conclude that the variance for the first plot is equal to the variance for the second plot. c) The P-Value is greater than the level of significance and so we reject the null hypothesis that the variances are equal. At 0.05 level of significance, we conclude that the variance for the first plot is equal to the variance for the second plot. d) The P-Value is less than the level of significance and so we fail to reject the null hypothesis…
A researcher wants to measure average cardiovascular health of university students and compare those scores to the average scores in the general population. Assuming that population variance is known, what statistical test is most appropriate for this study? independent-samples t-test single-sample t-test z-test for sample mean related-samples t-test
A significant result in an ANOVA indicates that A)the means of two groups are different, B)there is a significant effect of random variance. C)there is a significant effect of systematic variance. D)the intercept of the regression line is not zero.