### Analysis of Left-Handedness and Right-Handedness in Preschool Children**Research Context:**Lesley E. Tan conducted an investigation into the relationship between left-handedness, right-handedness, and motor competence among preschool children. The study involved random samples, comprising 41 left-handed and 41 right-handed preschool children. The children were subjected to various motor skills tests to determine if there was a notable difference based on handedness.**Experimental Data:**The results of the study are summarized below:| | Left-handed | Right-handed ||-------------------------|-------------|--------------|| **Sample size** | 41 | 41 || **Sample mean** | 97.5 | 98.1 || **Sample standard deviation** | 17.5 | 19.2 |**Statistical Analysis:**The appropriate statistical test for this data is a two independent means, Student's t-distribution hypothesis test.**Degrees of Freedom:**When calculating the degrees of freedom for this test, the goal is to determine the “conservative” value. The choices for the degrees of freedom are:- 80- 40- 81- 79The appropriate degrees of freedom, often used in statistical software like WeBWorK, needs to be selected for rigorous analysis.

The sample size for left-handed is 41 and the sample size for right-handed is 41.

Answered: 134. Lesley E. Tan investigated the…

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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2. A professional racing team is holding tryouts at its test track. The team requires its drivers to have an average lap time of at most 133 seconds at its test track. The team will use a one sample z-test of significance to determine if they should hire a new driver. An amateur driver completes 10 timed laps of the test track with an average lap time of 140 seconds. If the standard deviation of all lap times at this track is 4.5 seconds, what is the value of the test statistic? Round your answer to two decimal places. Answer value Please show work!!!
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To evaluate if auditors might be helped in determining the chances of fraud if they carefully measure cash flow, samples of midlevel auditors from CPA firms were asked to indicate the chance of material fraud on a scale from 0 to 100 for a case. A random sample of 36 auditors used the cash-flow information. Their mean assessment was 35.51, and the sample standard deviation was 24.14. For an independent random sample of 36 auditors not using the cash-flow information, the sample mean and standard deviation were, respectively, 40.58 and 29.18. Assuming that the two population distributions are normal with equal variances, test against a two-sided alternative the null hypothesis that the population means are equal. (Use α = 0.05.) Click the icon to view a table of critical values for the Student's t-distribution. Let μx be the mean assessment for auditors who measured cash flow and μy be the mean assessment for auditors not using the cash-flow information. Determine the null and…

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