Use the following data to answer question 8 - 12. A number of studies have claimed evidence that the first-born in a family is, onthe whole, more likely to be "successful" than later-borns. A study along this direction compared the IQs of a random sample of 80first-borns with those of an independent random sample of 105 later-borns. The data are summarized below:Sample sizeSample meanSample SDFirst-borns801127.2Later-borns1051088.0 Based on the data from question 8, for testing if first-borns have a larger mean IQ compared to later-borns using t-test, calculate(SE²₁+ SE²₂)²SE ₁SE 27₁-17₂-1the test statistics value and P-value. You can use df=A t_s=3.567, P value is less than 0.0010BDt_s=3.181, P value is between 0.0005 and 0.005t_s=3.567, P value is less than 0.0005t_s=4.000, P value is less than 0.0005+=177.9307

Answered: Use the following data to answer…

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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Willerman et al. (1991) collected a sample of 40 right-handed Anglo introductory psychology students at a large southwestern university. Subjects took four subtests (Vocabulary, Similarities, Block Design, and Picture Completion) of the Wechsler Adult Intelligence Scale-Revised (1981). The researchers used Magnetic Resonance Imaging (MRI) to determine the brain size of the subjects. The research hypothesis was that brain size is correlated with IQ. The data are below: Participant 1 2 3 4 6 17 8 Which statistical test would you select: Pearson Correlation Ho: p = 0 H₁: p = 0 ◆ ◆ Enter the data above into and JAMOVI and use the correct statistical procedure to test the null hypothesis - answer the following questions: What is the coefficient that indicates the strength of the relationship? r ◆ = 0 What is the standard error? What is the appropriate 95% CI? [ What is the d-effect size? Brain Size 110 90 100 92 94 98 104 111 What is the t-observed? What is the actual p-value? Complete the…
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The Nielson Home Technology Report provided information about home technology and cell phone usage. The following data are the hours of daily cell phone usage for a random sample of college students. Hours of Relative Usage Frequency Frequency 0.0-> 2.9 5 3.0- 5.9 28 6.0- 8.9 8 9.0-> 11.9 6 12.0- 14.9 3 Find the relative frequency of college students who use their cell phone between 12.0 and 14.9 hours. a.0.30 b.0.12 Oc. 0.06 d.0.03
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The Interpersonal Reactivity Index is a survey designed to assess four different types of empathy. One type of empathy, called Empathetic Concern, measures the tendency to feel sympathy and compassion for people who are less fortunate. The index ranges from 0 (less empathetic) to 28 (more empathetic). The following data, representing random samples of 8 males and 8 females, are consistent with results reported in psychological studies. Boxplots show that it is reasonable to assume that the populations are approximately normal and have equal variances. 13 20 12 16 12 16 13 26 21 Males 23 Females 22 20 26 25 28 24 16 19 Can you conclude that there is a difference in mean empathy score between men and women? Use a=0.05. (1) Critical Values (Round off to 3 decimal places): (2) Test Statistic (Round off to 2 decimal places): (3) Conclusion: (Type 'Reject HO' or 'Fail to Reject HO')
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3
The Interpersonal Reactivity Index is a survey designed to assess four different types of empathy. One type of empathy, called, Empathetic Concern, measures the tendency to feel sympathy and compassion for people who are less fortunate. The index ranges from 0 (less empathetic) to 28 (more empathetic). The following data, representing random samples of 16 males and 16 females, are consistent with results reported in psychological studies. Boxplots show that it is reasonable to assume that the populations are approximately normal. 13 8 22 20 20 12 15 18 Males 16 13 26 21 23 25 15 23 17 22 Females 20 26 25 28 24 16 19 23 21 23 15 26 19 25 Can you conclude at the 0.05 significance level that there is a difference in mean empathy scores between men and women?
Mr. Acosta, a sodiologist, is doing a study to see ifr there is a relationship between the age of a young adult (18 to 35 years old) and the type of movie preferred. A random sample of 93 adults revealed the following data. Test whether age and type of movie preferred are independent at the 0.05 level. Person's Age 18-23 yr 24-29 yr Drama 15 34 Science Fiction 14 10 6 30 6. Movie 30-35 vr Row Total Comedy 10 | Column Total 9 10 29 31 93 32 30 A USE SALT new window for the SALT program (a) What is the level of arymLaner State the null and alternate hypotheses. OH: Age and movie preference are not independent H,: Age and movie preference are not independent. O H: Age and movie preference are independent. H,: Age and movie preference are independent. OH: Age and movie preference are not independent. H,: Age and movie preference are independent. O H: Age and movie preference are independent. H.: Age and movie preference are not independent. (b) Find the value of the chi-square statistic…
Suppose a group is interested in determining whether teenagers obtain their drivers license at approximately the same average age across the country. Five teenagers from each region of the country were randomly selected. The data collected is their age at which the teenagers obtained their drivers licenses and is summarized in the table below. Test the hypothesis that the five regions produce the same mean average for a teenage driver’s license. Northeast South West Central East 16.3 16.9 16.4 16.2 17.1 16.1 16.5 16.5 16.6 17.2 16.4 16.4 16.6 16.5 16.6 16.5 16.2 16.1 16.4 16.8 (a)What are the hypotheses? (b)What is the F – Statistic? (c) What is the p – value? (d) What can you conclude about the null hypothesis? (e) What can you conclude about the population means?
2. Joe travels 280 miles on 12.3 gallons of gas. To the nearest tenth, what is the mileage rating for his car?
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