Suppose IQ scores were obtained from randomly selected
sibling
20 such pairs of people, the linear correlation coefficient is
0.853
and the equation of the regression line is
Modifying Above y with caret equals 16.83 plus 0.83 xy=16.83+0.83x,
where x represents the IQ score of the
younger child younger child.
Also, the
2020
x values have a mean of
100.77
and the
20
y values have a mean of
100.85
What is the best predicted IQ of the
older childolder child,
given that the
younger child has an IQ of
96?
Use a significance level of 0.05.
since at n=20, and 0.05 level of significance, critical r= 0.444,
for correlation coefficient r=0.853 is greater than crtiical value we can use regression equation for prediction
best predicted IQ =16.83+0.83*96 =96.51
Suppose IQ scores were obtained from randomly selected sibling 20 such pairs of people, the linear...
suppose IQ scores were obtained from randomly selected siblings. for 20 such pairs of people, the linear correlation coefficient is 0.917 and the equation of the regression line is y= -17.83 + 1.18x, where x represents the IQ score of the older child. Also, the 20 x values have a mean of 130.96 and the 20 y values have a mean of 104.9 what is the best predicted IQ of the younger child, given that the older child has an...
Suppose IQ scores were obtained for 20 randomly selected sets of siblings. The 20 pairs of measurements yield x overbarequals102.21, y overbarequals101.7, requals0.872, P-valueequals0.000, and ModifyingAbove y with caret equals 17.62 plus 0.82 x, where x represents the IQ score of the younger child. Find the best predicted value of ModifyingAbove y with caret given that the younger child has an IQ of 93? Use a significance level of 0.05.
Suppose IQ scores were obtained from randomly selected siblings. For 20 such pairs of people, the linear correlation coefficient is 0.916 and the equation of the regression line is ý = - 3.14 +1.02x, where x represents the IQ score of the younger child. Also, the 20 x values have a mean of 103.21 and the 20 y values have a mean of 102.1. What is the best predicted IQ of the older child, given that the younger child has...
2. Suppose IQ scores were obtained from randomly selected twins. For 20 such pairs of people, the linear correlation coefficient is 0.849 and the equation of the regression line is ŷ=0.68+0.99x, where x represents the IQ score of the twin born first. Also, the 20 x values have a mean of 100.9 and the 20 y values have a mean of 100.5. What is the best predicted IQ of the twin born second, given that the twin born first has...
On average is the younger sibling's IQ lower than the older sibling's IQ? Ten sibling pairs were given IQ tests. The data are shown below. IQ Scores Younger Sibling 106 85 91 113 91 110 96 96 87 116 Older Sibling 109 83 91 126 85 111 98 107 91 122 Assume a Normal distribution. What can be concluded at the the a= 0.10 level of significance? For this study, we should use Select an answer a. The null and...
Suppose IQ scores were obtained from randomly selected couples. For 20 such pairs of people, the linear correlation coefficient is 0.877 and the equation of the regression line is y= -14.38 + 1.14x, where x represents the IQ score of the wife. Also, the 20x values have a mean of 105.21 and the 20y values have a mean of 105.1. What is the best predicted IQ of the husband, given that the wife has an IQ of 91? Use a...
Suppose IQ scores were obtained for 20 randomly selected sets of couples. The 20 pairs of measurements yield x = 100.12, y = 100.8, r=0.869, P-value = 0.000, and y = 3.57 +0.97x, where x represents he IQ score of the husband. Find the best predicted value of y given that the husband has an IQ of 94? Use a significance level of 0.05. Click the icon to view the critical values of the Pearson correlation coefficient r. The best...
Suppose 1Q scores were oblained from randomly sekected couples For 20 such pairs of people, the inear correlation coeficent is 0 893 and the equation of the rogression line s y-524 108x, where x represents the 1Q score of the husband Also, the 20 x values have a mean of 98 72 and the 20 y values have a mean of 101 85 What is the best predicted 1Q of the wile, given that the husband has an IQ of...
Sibling IQ Scores: There have been numerous studies involving the correlation and differences in IQ's among siblings. Here we consider a small example of such a study. We will test the claim that, on average, older siblings have a higher IQ than their younger sibling. The results are depicted for a sample of 10 siblings in the table below. Test the claim at the 0.01 significance level. You may assume the sample of differences comes from a normally distributed population....
Sibling IQ Scores (Raw Data, Software Required): There have been numerous studies involving the correlation and differences in IQ's among siblings. Here we consider a small example of such a study. We will test the claim that, on average, older siblings have a higher IQ than their younger sibling. The results are depicted for a sample of 10 siblings in the table below. Test the claim at the 0.05 significance level. You may assume the sample of differences comes from...