researcher wants to test if the average performance of a new teaching method is different from the traditional teaching method in a sample of 25 students. The researcher used the Wilcoxon Signed-Ranks Test and obtained a T-value of 43. What can be concluded from the test result?

researcher wants to test if the average performance of a new teaching method is different from the traditional teaching method in a sample of 25 students. The researcher used the Wilcoxon Signed-Ranks Test and obtained a T-value of 43. What can be concluded from the test result?

Linear Algebra: A Modern Introduction

4th Edition

ISBN:9781285463247

Author:David Poole

Publisher:David Poole

Chapter7: Distance And Approximation

Section7.3: Least Squares Approximation

Problem 31EQ

See similar textbooks

Related questions

Q: The first question is wrong, can you please provide that as a fraction?

A: We have given the following table Color Frequency blue 219 brown 151 green 144…

Q: Construct a boxplot, by hand, for each vector. a.) M<-c(30, 2, 10, 200, 1, 80, 40, 30, 40, 35, 55)…

A: A boxplot is a graphical representation that depicts the five number summary of data. It also…

Q: Determine the following summary statistics: a) The year when snowfall was lowest. b) The year when…

A: At first I will run the data in "r' as given Year corresponding its Snowfall (in inch) To answer…

Q: Section 2.3 15. For each pair of values, use a percentage to express their relative change or…

A: given data now number of daily newspaper in US = 1486 in 1990 number of daily newspaper in US =…

Q: What percentage of presidents’ ages fall within one standard deviation of the mean? (Round to 1…

Q: You have a dataset with a mean of 50 and a standard deviation of 5. What is the coefficient of…

A: From the provided information, Mean (x̄) = 50 Standard deviation (s) = 5

Q: researcher wants to determine if there is a significant difference in the number of times a new…

A: Answer: The null hypothesis for this test is that there is no difference in the medians of the two…

Q: Determine the upper-tail critical value tx/2 in each of the following circumstances. a. 1-α = 0.99,…

A: Introduction A critical value is compared with the value of test statistic to decide whether to…

Q: 40 ALE E 60 F 80 BG 100 C 60 120 D H Z k

A: The objective is to define the standardized distribution of the given distribution of scores. For…

Q: se it is not clear

A: Let X be a random variable that takes the values (-∞,∞) Y is a random variable that takes only half…

Q: A box contains 10 balls, of which 5 are red and 5 are blue. Four balls are drawn randomly, without…

A: Given that: Total number of balls=10 Number of red balls = 5 Number of blue balls = 5

Q: 8. Relationships between means, standard deviations, X values, and z-scores The International…

A: From the provided information, Computer programmer in Poland makes (X) $1338.00 with Z score = +2.00…

Q: Calculate the mean number of Medical Emergencies/day and the standard deviation of this Probability…

Q: In a one-tailed hypothesis test, if the alternative hypothesis states that the population mean is…

A: Answer: The critical value for a significance level of 0.05 is 1.833.

Q: Task-5. Draw Stem and Leaf Plots of the following sets of data. Data-1: 25, 101, 355, 463, 172, 441,…

A: Given information: The sets of different data are given.

Q: Question: A fair 6-sided die is rolled. What is the probability of rolling a number less than 4?

A: Answer: The probability of rolling a number less than 4 is 2/6 or 1/3.

Q: In a hypothesis test, the null hypothesis states that the population proportion of individuals who…

A: The Z-score can be calculated as the difference between the sample proportion and the population…

Q: Suppose X is a discrete random variable with the following probability distribution: P(X = 2) = 0.3…

A: Given information P(X = 2) = 0.3, P(X = 4) = 0.2,P(X = 6)=0.5

Q: This solution does not answer the folowing question, (a) What is the probability that a randomly…

A: here given, mean : μ=55 inches standard deviation : σ=6 inches Z table :- we use above z…

Q: Three bolts and three nuts are put in a box. If two parts are chosen at random without replacement,…

A: From the provided information, Number of bolts = 3 Number of nuts = 3 Total parts = 3 + 3 = 6

Q: If Z is a discrete random variable with possible values of -1, 0, and 1, and the probability mass…

A: The standard deviation of Z is calculated as follows:

Q: A researcher wants to compare the effectiveness of two treatments on a sample of 25 patients. What…

A: Introduction The Wilcoxon Signed-Ranks Test is a non-parametric test used to compare two independent…

Q: In a hypothesis test, if the null hypothesis states that the population mean is equal to 100 with a…

A: given data μ = 100σ = 15x¯ = 108n = 36Z = ?

Q: A paper gives data on x= change in Body Mass Index (BMI, in kilograms/meter) and y= change in a…

A: "Since you have posted a question with multiple sub -parts,we will solve first three sub parts for…

Q: Suppose Nate loses 29% of all air hockey games. (a) What is the probability that Nate loses two air…

A: Given: Nate loses 29% of all air hockey games i.e., p=0.29.

Q: The following is a set of data from a sample of n = 5. 2 5 7 34 a. Compute the Z scores. Are there…

A: Given that x x2 2 4 5 25 7 49 3 9 4 16 --- --- ∑x=21 ∑x2=103

Q: A ride-sharing company has computed its mean fare to be $32.00, with a standard deviation of $4.10.…

Q: What is the variance of a continuous probability distribution given by the density function f(x) =…

A: The variance of a continuous probability distribution is calculated as follows:

Q: For a standard normal distribution, determine the following probabilities. a) P(Z > 1.48) b) P(Z >…

A: a) P(z >1.48)

Q: What is the formula for the 95% confidence interval for a population mean, given a sample mean and…

A: Given that 95% confidence interval for populations mean.

Q: Let x be the size of a house (in square feet) and y be the amount of natural gas used (therms)…

A: It is given that: The slope of the regression line is β=0.013. The y-intercept is α=-7.

Q: A sample of size 8 was collected from an unknown population 0 1126 10 11 20 1. Use the table of…

A: Given information: A sample of size 8 is given.

Q: How do you solve this statistics question without using code? In the United States, the probability…

A: Given that n=5000, p=0.01

Q: A random variable X follows a normal distribution with mean μ = 100 and standard deviation σ = 20.…

Q: A data set with whole numbers has a low value of 20 and a high value of 95 Find the class width for…

A: For a wide range of values it is necessary to form classes of equal or unequal length. The length of…

Q: What is the formula for calculating the standard deviation of a set of n observations?

A: Introduction The standard deviation is one of the measures of variability.

Q: In your post, address the following questions using all the data provided: 18 24 5 6 13 MPG 35 30 25…

A: The scatterplot of weight and mpg of cars is given.

Q: Consider a random variable Y that follows an exponential distribution with a rate parameter of 0.5.…

A: Answer: The cumulative distribution function (CDF) for an exponential distribution with rate…

Q: Different authors disagree whether the distribution of snowfall heights has one, two or three modes.…

A: Given information: Year Snowfall 1910 126.4 1911 82.4 1912 78.1 1913 51.1 1914 90.9…

Q: 3. If the probability density of a random variable is given by f(x)= kxe x>0 =0 Xx≤0 Find (1) k, (H)…

A: The probability density function is given as- fx=kxe-x3 ,x>0

Q: stant) and find the limit of My (t) as n →∞. What is the limit of the corresponding distributions?…

A: Given Y~Bin(n,p) Mean=np

Q: The data below represents the life expectancy for some African and Asian countries. Construct a…

A: We have given in the question: The data of the life expectancy for some African and Asian…

Q: What is the formula for calculating the standard error of the mean (SEM) in a simple random sample…

Q: #2 The National Automobile Dealers Association (NADA) publishes AutoExec Magazine, which annually…

A: The given market shares of new vehicles in the USA for 2005 is given as:

Q: 18. FILE DOW. The accompanying table shows a portion of the 30 companies that comprise the Dow Jones…

A: Measurement of scales : Nominal : ( named) Ordinal : ( named + ordered) Interval : ( named +…

Q: Question: A certain criminal suspect is known to have a criminal record in 25% of all cases, and a…

A: This problem can be solved using Bayes' theorem. The probability of the suspect actually having a…

Q: Consider the data set. 2,4,5,7,9 a) find the range b) use the defining formula to compute the sample…

A: We have given that, The data set are, X :- 2, 4, 5, 7, 9 Then, We will find the range, sample and…

Q: Suppose the accompanying summary statistics for a measure of social marginality for samples of…

Q: 1. Make a table of values and probabilities for the Wilcoxon signed rank statistic T+ for the case…

A: Given, Wilcoxon signed rank statistics T+ and n=4

Q: The data (partially shown below) collected information about the house price and square foota of…

A: We have to right the steps for drawing histogram of the given dataset. Sqft Houseprice 1520…

Question

A researcher wants to test if the average performance of a new teaching method is different from the traditional teaching method in a sample of 25 students. The researcher used the Wilcoxon Signed-Ranks Test and obtained a T-value of 43. What can be concluded from the test result?

Expert Solution

Step 1

Introduction :

The Wilcoxon Signed-Ranks Test is a non-parametric statistical test used to compare the median of two sets of paired or unpaired observations. The test statistic, T, is calculated as the sum of the ranks of the differences between the two methods.