work shown would be very appreciated A Stats Exam 2ReferencesMailingsReviewView=、三、而AaBbCcDdEe AaBAaBbCcDdEeAaßbCcDdEeAaBbCcDdEeNormalNo SpacingHeading 1Heading 2Titlees, fixes, and improvements, choose Check for Updates.The lengths of pregnancies have a mean of 268 days and a standard deviation of 15 days. A researcheris concerned that people who have taken a particular drug in the past might have shorter lengths ofpregnancies. The researcher sampled n = 25 people who had taken the drug and recently given birth,and found they had an average length of pregnancy of 262.9 days. Do these data support theresearcher's claim? (Use a = 0.01, one-tail test)9. Calculate the effect size using Cohen's d.10. What conclusion can the researcher make from these dataa. Reject the null; there was a significant differenceb. Reject the null; there was not a significant differencec. Fail to reject the null; there was a significant differenced. Fail to reject the null; there was not a significant difference

Given,population mean (µ) = 268sample mean (x̄) = 262.9population standard deviation (σ) =…

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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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To be accurate with the language of regression, we should state, “we regress y and x”. a) True b) False
It is extremely important for a researcher to clearly define the varibales in a study because this helps to determine the type of analysis that can be performed on the data. For example, if a researcher wanted to describe people based on Social Security number, what level of measurement would the variable "Social Security number" be? Now suppose the researcher felt that certain people who lived farther ease received higher numbers. Does the level of measurement of the variable change? If so how? What is the level of measurement of the variable "Social Security number"in the origiinal scenario?
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Show all work, thank you! Part a, b, and c of question.
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The line of best fit through a set of data isy=21.974+1.021xy=21.974+1.021xAccording to this equation, what is the predicted value of the dependent variable when the independent variable has value 140? Y=
Pison/&user=tmorrison7&key%3DrotNBBCzVIsGRqZV8t.. Previous Problem Problem List Next Problem (1 point) Empathy means being able to understand what others feel. To see how the brain expresses empathy, researchers recruited 16 couples in their midtwenties who were married or had been dating for at least two years. They zapped the man's hand with an electrode while the woman watched, and measured the activity in several parts of the woman's brain that would respond to her own pain. Brain activity was recorded as a fraction of the activity observed when the woman herself was zapped with the electrode. The women also completed a psychological test that measures empathy. Subject 1 3 4 7 8 9 10 11 12 13 14 15 16 Empathy Score 41 48 39 56 64 63 59 53 Brain Activity -0.127 0.3910.02 0.378 0.015 0.404 0.11 0.513 0.149 0.736 0.254 0.573 0.217 0.72 0.355 0.786 47 52 64 73 12 68 28 120 1.2 sub ject Z F20 10,0 120 -8.4 Given that the equation for the regression line is y = 0.00619x +0.00032, what is…
You Got Gas have developed a new type of fuel additive that supposedly increases car speed. Before they put it out on the market, however, they need to test if it really is a difference compared to standard fuel. So, they took 6 vehicles and calculated the time it takes to for them to drive 1 mile going as fast as they can. They received the following data: Car ID# Course time (standard fuel in minutes) Course time (w/ additive in minutes) 1 35 27 2 40 35 3 25 27 4 40 39 5 95 94 6 32 18 6. What is the null and research hypothesis for this study? 7. What type of statistical test should we use to compare means (z-test, independent t-test, dependent t-test, or ANOVA)? Why? 8. What are the degrees of freedom? What are the critical values for that statistical test with this data at α = 0.05? α = 0.01? 9. Comparing the groups, is there a significant difference at α = 0.05 in lap time between eating the name bran and when they ate Dog Go? 10. How would the researcher…

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