22. In an extensive study involving thousands ofBritish children, Arden and Plomin (2006) foundsignificantly higher variance in the intelligencescores for males than for females. Following arehypothetical data, similar to the results obtainedin the study. Note that the scores are not regularIQ scores but have been standardized so thatthe entire sample has a mean of M = 10 anda standard deviation of2.a. Calculate the mean and the standard deviation forthe sample ofn = 8 females and for the sample ofn = 8 males.b. Based on the means and the standard deviations,describe the differences in intelligence scores formales and females.FemaleMale9.8.1110101113128.6.9.1011149.9.Within a population, the differences that exist fromdiversity.

Given Mean = 10 Standard deviation = 2 Female male 9 8 11 10 10 11 13 12 8 6 9 10…

Answered: 2. In an extensive study involving…

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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(5). Calculate SS, variance and standard deviation for the following sample of n=7 scores: 8, 6, 5, 2, 6, 3, 5.
The following information was obtained from two independent samples randomly selected from tvo normally distributed population with unknown but equal variances. Mean Standard deviation Sample size Sample 1 15.55 3.26 20 Sample 2 13.97 3.78 21 What is the point estimate of the population variance? OA. 13.144 OB. 12.205 OG.3.527 OD.3.536 web.whatsapp.com - now
The salaries of professional baseball players are heavily skewed right with a mean of $3.2 million and a standard deviation of $2 million. The salaries of professional football players are also heavily skewed right with a mean of $1.9 million and a standard deviation of $1.5 million. A random sample of 40 baseball players' salaries and 35 football players' salaries is selected. The mean salary is determined for both samples. Let 1,-i, represent the difference in the mean salaries for baseball and football players. Which of the following represents the mean of the sampling distribution for ī, -7,? -1.3 1.3 1.9 3.2
Q6: The following data represents the discharge of an irrigation channel during a specific time. Determine: 1) 1. Average and median, 2) 2. Variance and Standard deviation, 3) 3. Check the normality of dat, 4) 4.draw the histogram and ascending cumulative frequency. 5.5- 7.5- 9.5- 11.5- 13.5- 15.5- 17.5- 19.5- Time 7.5 9.5 11.5 13.5 15.5 17.5 19.5 21.5 Discharge 3.5 6.3 9.5 11 8.5 6.8 4.9 (m³/hr)
help please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working
A plant pathologist wants to compare two strains of bacteria in terms of its reproduction rate. Test of normality showed that the two samples have heterogeneous variances. Which of the following would you advise the plant pathologist to conduct? A. t-test B. Mann Whitney C. Kruskal Wallis test . D Anova F-test
A new study has found that, on average, 6- to 12-year-old children are spending less time on household chores today compared to 1981 levels. Suppose two samples representative of the study's results report the following summary statistics for the two periods. 1981 Levels 2008 Levels 24 minutes 19 minutes 51 = 3.5 minutes 52 - 4.3 minutes ni = 30 n2 - 30 Which of the following is the correct value of the test statistic assuming that the unknown population variances are equal? Multiple Cholce Z = -4.94 tss = 4.94 Z = 4.94 t59 = -4.94
A random sample of 89 tourists in British Columbia showed that they spent an average of $2860 (in a week) with an assumed population standard deviation of $126; and a sample of 64 tourists in Alberta showed that they spent an average of $2935 (in a week) with an assumed population standard deviation of $138. We are interested in determining if there is any significant difference between the average expenditures of all the tourists who visited the two provinces.a. At a significance level of 0.05, are the two average expenditures significantly different? b. Calculate the 99% confidence interval and interpret your results?
1
Two accounting professors decided to test if the variance of their grades is different or no. To accomplish this, they each graded the same 10 exams with the following results: Standard Deviation 22.4 Mean Grade Professor 1 79.3 Professor 2 82.1 12.0 F What is the P-value of the test? Select one: a. between 0.01 and 0.025 Ob. between 0.025 and 0.05 C. between 0.05 and 0.10 Od. bigger than 0.10
You conduct a between-subjects ANOVA investigating whether different states produce tastier cheeses. You find that eta-squared is .50. What does this tell you? a. The effect size is small. b. 50% of the total variance in tastiness is due to differences between the states. c. The difference between the group means is .50 standard deviations. d. All of the above
I often hear the opinion that "people who listen to classical music are smarter". In an attempt to test that claim, gave an IQ test to two groups of people: Group 1: Students who primarily listen to non-classical music. • Group 2: Students who primarily listen to classical music. Their scores are summarized in the following table: Std. Deviation Group 1 111 Group 2 100 98 87 119 108 102 110 10.392 85 105 97 114 93 101 9.142 Answer the question using a 0.10 level of significance. Select the correct answer to this question: Which is the approximate P-value of this Test? O 0.148 0.852 0.015 O 0.426

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