What does a statistically significant t test indicates?

Q: What is the third quartile

A: We are asked to find the third quartile

Q: Were the two laboratories measuring the same thing? (Assume normality and common variance.) Be sure…

A:

Q: When looking to understand the Z score what does it actually mean in simple terms in comparison to…

A: The value of the z-score tells you how many standard deviations you are away from the mean. If a…

Q: Find the critical ? value for a left-tailed test using a significance level of ?=0.04.

A: Obtain the critical value for the left tailed test at the 0.04 level of significance.   The critical…

Q: At a .01 significance level with a sample size of 20, find the critical value for the correlation…

A: The level of significance is 0.01 and the sample size is 20.

Q: What is the conclusion about the t-statistic and the p-value?

A: Decision rule: If p-value ≤ α, then reject the null hypothesis. Otherwise, fail to reject the null…

Q: Does statistically different indicate substantially different? Why or why not?

A: No, statistically different does not indicate substantially different. These two are different…

Q: What are Z scores?

A:

Q: Report the t-test (or F-test) results for whether the tobacco expenditures variable is a…

A: The hypothesis is, Null hypothesis: H0: The tobacco expenditures variable is not statistically…

Q: Which describes a normal distribution with mean μ and variance o²?

A: here use basic of normal distribution curve

Q: Define the term of Experimental Error ?

A:

Q: What two characteristics of an empirical distribution can DECREASE the size of the standard error?

A: The two characteristics of an empirical distribution that can decrease the size of the standard…

Q: Could you please help me understand the difference between a z-test and a t-test for in statistics?

A: Both the tests are useful to test the significance of means.Both the tests are assume a normal…

Q: 3. Why is a t-distribution generally more variable than a normal distribution?

A: The probability distributions that needs to be applied in the dataset depends on the…

Q: given a normal distribution curve, what is the area below a z-score of -1.2?

A: Given that, The z-score value is -1.2.

Q: What information is provided by calculations of the “t” test statistic?

A:

Q: What is the test statistic t ?

A: Here, the sample size n is 237.

Q: What is a T-Test? How is it applied to a Single Population Data Set?

A: Student's t-test was given and first used by W.S. Gosset in 1908. The statistician W.S. Gosset is…

Q: Converting scores into z scores standardizes the original distribution to units of the ?

A: Introduction: For a normally distributed random variable, X with mean μ, and standard deviation σ,…

Q: For a normal distribution, the first quartile corresponds with the 25th percentile.   A.) True B.)…

A:

Q: Let x be the number of heads when a coin is tossed 5 times. What is the expected value E(x)? What is…

A:

Q: What is the mean of X? What is the expected value of the area, E(Y)? What is the variance of X?

A: The mean of X is defined as E(X) = ∫x.f(x) dx And Var(X) = E(X2) - (E(X))2

Q: The numerical index that measures, on average, how far a given value is from the mean is called the…

A: Standard deviation: The standard deviation explains how much each observation deviates from a…

Q: 21 smooth/yellow 42 smooth/light-yellow 19 smooth/white 22 wrinkled/yellow 39…

A:

Q: What is the key difference between an independent and a dependent samples t-test?

A: Solution-: What is the key difference between an independent and a dependent samples t-test?

Q: Use an analysis of variance with α = .05 to determine whether these data indicate any significant…

A: For the given data Perform Anova single factor

Q: A researcher reports an F-ratio with dfbetween = 2 and dfwithin = 30 for an independent-measures…

A: Given : dfbetween = 2 anddfwithin = 30 Let k denote the number of treatments. Let N denote the…

Q: What is measured by the estimated standard error that is used for the independent measures t…

A:

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: A news article reported that the college students who have part-time jobs work an average of 15…

A: From the provided information, Sample mean (x̅) = 13.755 Sample standard deviation (s) = 3.535…

Q: what is the mean and standard deviation of all z distributions?

A: Z is distributed as a standard normal variable.

Q: A z-score that is 6 points below the mean corresponds to a z = -2.00. What is the populations'…

A:

Q: What is the predicted response value? y =

A: Given Regression Equation : and,

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: 4. A. What is the critical t-score for a two-tailed test with a a = 0.05? tcrit B. Is this…

A: Correlation coefficient r = 0.3931   The test statistic is given by

Q: How to find the expected value and variance of a beta from a Gamma distribution?

A: Pdf of gamma distribution is

Q: How do you tell if a ANOVA is significant given the F value, p value, and eta squared? What does the…

A: In ANOVA, the null hypothesis is that there is no difference between group methods. If any group…

Q: What is the empirical rule?

A: The word 'empirical' stands for 'based on observations.  The 68–95–99.7 rule, also known as the…

Q: Prove an efficient estimator for the average of a normal population

A: X~ Normal with mean= mu and variance= sigma^2 Find efficient estimator for the mean

Q: What is the difference between Normal and T-distribution?

A:

Q: What is the best thing to do when the result failed to meet statistical significance but had a…

A: Statistical significance of a result: It is used in the testing of hypotheses. To determine whether…

Q: When do you consider a person to be statistically literate?

A: From the given information we find solution

Q: ocate the following percentile under the normal curve and find its corresponding t-value. Sketch and…

A: The objective is to locate the percentile and find the corresponding t-value. Percentile is the…

Q: What is the expected value for an F-ratio when there is no treatment effect?   Why?

A: F-ratio: The F-ratio for ANOVA is given as follows: F=Variance between treatmentsVariance within…

Q: What happens to the t-distribution as the sample size increases?

A: As we know that the t-distribution is affected by the sample size. As sample size increases the…

Q: What does statistically significance indicates?

A: Statistical significance: If the chance of occurrence of an event is less than or equal to 5% then…

Q: Why is obtaining the mean and standard deviation of xa first step in approximating the sampling…

A:

Q: For the standard normal curve, find the z-score that corresponds to the 90th percentile.

A:

Q: Find Pas, that is find 90 percentile of z-score from the standard normal distribution. 6.

A:

Q: What does it mean to be statistically literate?

A: Thanks for giving opportunity to serve for bartleby students,   Hey, There ! Thank you for posting…