2. An educator wants to determine whether early exposure school will affect IQ.He enlists the aid of the parents of 12 pairs of pre-school-age identical twins whoagree to let their twins participate in the experiment. One member of each twin pairis enrolled in preschool for 2 years while the other member of each pair remains athome. At the end of 2 years, the IQs of all the children are measured. The resultsfollow: (Pagano, 2010) If proved significant, compute of the effect size.IQTwins at homePairTwins at preschool11101142121118310710341171121151176112106 713012581161139.111109101201221111711612106104

The t test is used to determine the mean significance between the sample and population. It is used…

Answered: 2. An educator wants to determine…

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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A researcher is examining whether two variables, A and B, are independent or not. Variables A and B have 5 and 6 categories, respectively. A sample of n = 400 subjects is obtained. What is the degrees of freedom in the chi-squared test?
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2. Metal Tags on Penguins and Survival. Data were collected over a 10-year timespan from a sample of 100 penguins that were randomly given either metal or electronic tags. One variable examined is the survival rate 10 years after tagging. The scientists observed that 10 of the 50 metal tagged penguins survived, compared to 18 of the 50 electronic tagged penguins. Test whether the survival rate is lower among metal- tagged penguins than among electronic-tagged penguins. Use subscripts E for Electronic and M for Metal. a. State hypotheses. b. Calculate the sample statistic PE - PM c. Use Normal distribution methods to calculate a z-test statistic, given SE = 0.0898. d. Find the p-value and draw a Normal curve with z-statistic and appropriate shaded region. Normal curve: p-value: e. State the conclusion of the test in context, using nontechnical language. f. Find a 90% confidence interval to three decimal places for this difference in proportions, given SE= 0.08836. Show your…
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The Bureau of Labor Statistics reports that the official unemployment rate for Black people was 10.4% and 4.7% for White people in February 2015. Select all correct answers for this question. O The samples of white and black people are independent. The explanatory variable is the unemployment rate. The response variable is the unemployment rate. The response variable is race.
st is 22. Oishi and Shigehiro (2010) report that people who move from home to home frequently as children tend to have lower than average levels of well-being as adults. To further examine this relationship, a psychologist obtains a sample of n = 12 young adults who each experienced 5 or more different homes before they were 16 years old. These participants were given a standardized well-being questionnaire for which the general population has a
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C, D, G

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