A company that develops an automated customer service model is interested in knowing whether two versions,Version A and Version B, will get different ratings from customers. Participants in a focus group are taken throughsamples from both versions, then take a survey to rate each version. A summary of the data obtained from thestudy is given below. Assume ratings from the different surveys generally have the same standard deviation.MeanObservationsPearson CorrelationHypothesized Mean Differencedft StatP(T<=t) one-tailt Critical one-tailP(T<=t) two-tailt Critical two-tailConfidence Levelη=Version A Version B39.33334.415-0.011Ex: 9014-2.0860.028-2.6240.056-2.97799%15Degrees of freedom: df ==Point estimate for Version A: XA = Ex: 1.234Point estimate for Version B: x B =t-3=-2-1Ex: 1.234701t =||Р2-Ex: 1.23432C2

A company that develops an automated customer service model is interested in knowing whether two…

Answered: A company that develops an automated…

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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In a study on running and happiness, runners indicated the number of miles they ran in a day and their subsequent score on a Happiness Survey (higher score = greater happiness). Runner # of miles (x) Happiness Score (y) 1 16 12 2 4 3 12 14 4 2 8 For these data: The mean of miles run is: 8.50 The mean of the Happiness scores is: 10.00 The standard deviation of the Miles scores is: 5.72 The standard deviation of the Happiness scores is: 3.16 In your submission, please include a copy of the SPSS or Excel output and answer the following: A. What is the r and r? value? B. Based on Pearson's r and r2 value, describe the relationship (direction/strength) that exists between # of miles run and Happiness scores. C. Create a scatterplot for the data using Excel or SPSS (include output in your submission). D. Insert the prediction line from Excel/SPSS on your scatterplot.
The statistical procedure that calculates a linear relationship between two interval/ratio variables is known as _______.
TOPIC : MEASURES OF DISPERSION Please use your group data to formulate these following items. 1. Range, its meaning, and the formula. 2. Mean Deviation, its meaning, and the formula. 3. Standard Deviation, its meaning, and the formula. 4. Variance, its meaning and the formula. Picture below is the group data:
The following data represent the results from an independent-measures study comparing itwo treatment conditions. Test at 0.05 level of significance to determine whether there is a significant mean difference between the two treatments. Use 4 decimal places.Treatment I Treatment II 8 2 7 3 6 3 5 5 9 2STATISTICS = _____COMPUTED VALUE = _____TABULAR VALUE = _____CONCLUSION = _____
Answer Q.1
Repeated baseline measurements help improve the ____ of a single-subject study. A.Ecological validity B. Generalizability C. Internal validity D. Sample's representativeness
Consider the following data: −10, −10, 0, 3, −10, 3, 3 Step 1 of 3: Calculate the value of the sample Variance. Round your answer to one decimal place. Step 2 of 3: Calculate the value of the sample deviation. Round your answer to one decimal place. Step 3 of 3: Calculate the value of the range.
A company that develops an automated customer service model is interested in knowing whether two versions, Version A and Version B, will get different ratings from customers. Participants in a focus group are taken through samples from both versions, then take a survey to rate each version. A summary of the data obtained from the study is given below. Assume ratings from the different surveys generally have the same standard deviation. Mean Observations Pearson Correlation Hypothesized Mean Difference df t Stat P(T<=t) one-tail t Critical one-tail P(T<=t) two-tail t Critical two-tail Confidence Level Version A Version B 33.133 28.67 15 15 -0.325 0.00 14 n = Ex: 9 -1.426 0.088 -1.345 0.176 -1.761 95% Degrees of freedom: df Point estimate for Version A: XA = Ex: 1.234 Point estimate for Version B: x B = 1 = من t = −1 Ex: 1.234 0 1 t = P = = Ex: 1.234 2 3 2
Suppose we want to compare scores (which can take on any value within a specified range) at baseline and at follow-up for a given sample. Using the data in the table below, compute a 95% CI for the mean difference in scores. Subject ID Baseline Follow-Up 1 13 6 2 10 8 3 9 11 4 12 11 5 8 5
The ages of undergraduate students at two universities (one in the east and one in the west) are being compared. Researchers want to know if there is a difference in the mean age of students at the two universities. The population standard deviations are known. The following data shows the results of samples collected at each institution: School Location n (sample size) sample mean ( ) population standard deviation West 33 25.78 6.29 East 35 23.16 7.52 What is the value of the test statistic for the previous problem? (Enter your answer as a positive value even if you calculated a negative test statistic value i.e. if you calculated -1.311 you should enter 1.311). Round your answer to 3 decimal places.
Which of the following are measures of central tendency? Four answers correct. 1. Arithmetic mean 2. The second quartile 3. Variance 4. Median 5. Interquartile range 6. Standard deviation 7. Range 8. Mode 9. Coefficient of variation
Give the value of the following;a. meanb. medianc. moded. range (using midpoint)e. variancef. mean absolute deviation (MAD)g. standard deviationh. coefficient of variation

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