If the test value for the difference between the means of two large samples is 2.57 when the critical value is 1.96, what decision should be made? 1.96 2.57

Q: Would you expect the F-ratio of an independent-samples ANOVA using the same data to be the same,…

A: Introduction: Repeated measures ANOVA or repeated measures analysis of variance is a parametric…

Q: suppose you want to estimate the proportion of those who passed the subject (grade ≥ 75). How large…

A: Given:Relative error=10%Risk factor=15%Find:Sample size?

Q: if other factors are held constant, as a sample size decreases, the estimated standard error?_____

A: Different types of standard errors are described below.

Q: study comparing two treatments with n = 4 participants produces MD = 2 and SS = 75 for the…

A: Given: n = 4 MD = 2   SS = 75

Q: To determine if the means of three or more populations are equal, you should use : Select one: O a.…

A:

Q: Suppose you will perform a test to determine whether there is sufficient evidence to support a claim…

A: Given Information: Sample size (n) = 11 Significance level α=0.01 To determine if there is…

Q: 1. A survey found that the average hotel room rate in Luzon is P2,300and the average room rate in…

A:

Q: (A) Were the two samples obtained independently? Support your assertion.

A: We need to use the concept of Hypothesis testing

Q: How much difference is there between the mean for the treated sample and the mean for the original…

A: Definition Sample Mean x It is the mean of all the values of a sample.   Population μ It is the mean…

Q: Describe three out of the several indices on effect sizes for independent samples t tests and when…

A: The most 3 common indices on effect sizes for independent samples t test are 1. Cohen's d 2. Eta…

Q: What statistical tool is appropriate if the number of data is large and O is known?

A: Here we need to find out the statistical tool if the number of data is large and standard deviation…

Q: For two numerical variables X and Y, knowing that the correlation coefficient is equal to 0.45, (x;…

A: Introduction: The two variables are X and Y. Denote the correlation coefficient between the two…

Q: Two samples, each with n =5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given: Let the pooled variance be sp2 n1=n2=5   Let the standard error be SE Formula for Standard…

Q: 2. Use the first 30 data values in Table 1. Test, at the 5 percent level of significance, the…

A: For mean cholesterol, The hypothesis to be tested is- H0:μmen=μwomen H1: μmen≠μwomen This is a…

Q: When you are testing the difference between two means, it is not important to distinguish whether…

A: Consider the provided question, We have to check the given statement is true or false. Then the…

Q: Is the Chebyshev's rule used only with populations? Are samples used as well?

A: Yes, Chebyshev’s rule can be applied to population as well as sample.We should know the following…

Q: If a P-value is .043, what does that mean in terms of the value obtained for the test statistic?

A: p-value is the probability of obtaining more extreme results under  null hypothesis, by more extreme…

Q: With mound-shaped data, what proportion of the mea- surements have z-scores between-3 and 3?

A: From the provided information, The data is mound shaped. A mound shaped data is sometimes called…

Q: Given a population has a mean of 120. What is the sampling érror, štandard er nd marginal error for…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: at a 0.10 significance level?

A: No treatment  Fertilizer  Irrigation  Fertilizer and irrigation  1.212 0.939 0.069 0.852…

Q: What is the relationship between the critical value with the level of significance (alpha)?

A: here use basic of significance level and critical value

Q: The EPA maximum contaminant level (MCL) for arsenic is 10 micrograms per liter. (10ug/L). You wish…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Answer the following questions. 2A. The mean length of a work week for the population of workers was…

A: 2.AGiven that,Population mean (µ) = 45Sample size (n) = 100Sample mean (x-bar) = 42Sample standard…

Q: The EPA recommends avoiding consumption of fish species if the mercury concentration is higher than…

A: Obtain the confidence interval for the mercury concentration: The concentration in a large random…

Q: Describe one of the two scenarios in which a related samples t-test is the appropriate test of…

A: Two samples are said to be independent if the sample values selected from one population are not…

Q: What is the value of tobt for the independent samples?

A: The formula of test statistic for two independent samples t test is,

Q: Leading up to this past November’s election, suppose that two polls of randomly selected registered…

A: Given that  Sample sizes n1=140 , n2=100 Favorable cases x1=98 , n2=80 NOTE:- According to bartleby…

Q: To determine whether there is a systematic difference between the weights obtained with two…

A: Solution-: To determine whether there is a systematic difference between the weights obtained with…

Q: At the a Y 0.05 significance level, what is the most appropriate conclusion to draw from this test?

A: To make decisions about hypothesis, we make comparison of p-value and level of significance.

Q: When the population means are equal, the estimated standard error for the independent-measures t…

A: Compute the estimated standard error in the first part: Given that the sample sizes of two samples…

Q: What will happen to the sample size if the percentage error becomes lower? Can you explain to me how…

A: From the given information we want to find solution.

Q: which of the best illustrates the distinction between statistical significance and practical…

A: Statistical significance: It consider that the observed results are unlikely under the assumption…

Q: Between the two samples below, determine which one has the greater variability between groups,…

A: In order to determine whether there is significant difference in between the population means of…

Q: A set of data is mounded, with a mean of 450 and a variance of 625. Approximately what proportion of…

A: Normal Distribution :  Normal distribution, also known as the Gaussian distribution, is a…

Q: What conditions are necessary in order to use the dependent samples t​-test for the mean of the…

A: Necessary conditions for dependent samples in t-test, and for the difference in the means of two…

Q: What sample size is needed to give a margin of error within +4% in estimating a population…

A:

Q: • When might a small sample size be appropriate in a study? •When is a very large sample size…

A: When the sample size is ideal then a sample size can be appropriate in a study. The ideal sample…

Q: What percentage of the data in a sample falls below the third quartile Q3?

A: There are three quartiles Q1, Q2 ans Q3. 25% of observations lies between each two quartiles.

Q: We use information about populations to make conclusions about our samples. * TRUE FALSE

A: Given statement :  We use information about populations to  make conclusions about our samples

Q: Is the following statement true or false and why: If we do not reject ?0H0, then we conclude that…

A: If H0 is not rejected that means there is not sufficient evidence to support the alternate…

Q: Seven acute schizophrenics and 10 chronic schizophrenics have been measured on a clarity of thinking…

A: Given:

Q: When testing for the difference between the means of two dependent samples, the sample sizes are…

A: We have to find given statement is true or false.

Q: For an independent-measures ANOVA comparing three treatments with a sample of n = 5 in each…

A: From the provided information, The level of significance (α) = 0.05 Number of treatment (k) = 3…

Q: Suppose you will perform a test to determine whether there is sufficient evidence to support a claim…

A: The sample size n is 12 and the level of significance is 0.01.

Q: Two samples, each with n = 5 scores, have a pooled variance of 40. What is the estimated standard…

A: Given Datan1 = n2 = 5pooled variance = 40Estimated standard error is given by

Q: 2. Explain the relationship between the population mean µ, the sample mean X, and a value of the…

A: Population: Population consists of the complete subjects that are included in the study for making…

Q: For an independent-measures ANOVA comparing three treatments with a sample of n = 10 in each…

A: For an independent-measures ANOVA comparing three treatments with a sample of n = 10 in each…

Q: An independent measures design study with n= 16 in each sample produces a sample meam difference of…

A:

Q: there is a claim that people living near major roads have higher blood levels of lead. 30 women…

A: We have given that  Sample size =n1=30 , the mean blood lead level was calculated as x̄1=15 and…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.