Arden and Plomin (2006) published a study reporting that IQ scores for boys are more variable...

Arden and Plomin (2006) published a study reporting that IQ scores for boys are more variable than IQ scores for girls. A researcher would like to know whether this same phenomenon applies to other measures of cognitive ability. A standard cognitive skills test is given to a sample of n = 15 adolescent boys and a sample of n = 15 adolescent girls, and resulted in the following scores. Boys Girls 9 5 3 9 7 6 5 4 6 7 5 2 4 8 8 6 4 7 6 8 7 4 9 7 3 5 7 8 6 5 1) Calculate the mean and the standard deviation for each group. Boys: Girls: 2) Based on the means and the standard deviations, describe the differences in intelligence scores for boys and girls. A- The girl's mean intelligence score is HIGHER THAN, LOWER THAN, OR THE SAME AS that the boy's scores. B- The boys’ scores are AS VARIABLE AS, LESS VARIABLE THAN, OR MORE VARIABLE THAN the girls’ scores?

Expert Solution

milcah answered 1 year ago

(15pts) A researcher wants to compare IQ scores for boys and girls. He obtained IQ scores...

(15pts) A researcher wants to compare IQ scores for boys and girls. He obtained IQ scores for 47 randomly sampled seventh-grade boys in a Midwest school district and 31 seventh- grade girls in the same district. (a) Based on the design, which test should the researcher use to analyze the data? One-sample t test, matched-pair t test or two-sample t test?(2pts) (b) Based on the JMP output below, report the 95% CI for the mean IQ score difference between boys...

A recent study was done comparing the IQ scores of women and men. In a sample...

A recent study was done comparing the IQ scores of women and men. In a sample of 22 women, the average IQ score was 100.6 with a sample standard deviation of 7.3, and for a sample of 13 men, the average IQ score was 101.3 with a sample standard deviation of 9.8. Use a 0.01 level of significance to test the claim that the average IQ score for women and men is the same.

1. An investigator uses children’s WISC IQ scores as part of her study of how children...

1. An investigator uses children’s WISC IQ scores as part of her study of how children respond to different teaching methods. She obtains a random sample of four children from a 5th grade class and obtains their WISC IQ scores. Their scores are shown below. Her null hypothesis is that her sample does not differ from the general population of 5th graders, whose IQ scores are assumed to have a m of 100 and a s of 15. She decides...

A study of parental empathy for such a baby temperament ( higher scores mean more empathy)...

A study of parental empathy for such a baby temperament ( higher scores mean more empathy) was performed. Let X1 a random variable that represents a score of a mother on an empathy test (as regards her baby). Let x2 be the empathy score of a father. A random sample of 40 mothers gave a sample mean of x1= 68.36. Another random sample of 39 fathers gave x2 = 59.51. Assume standard deviation 1 = 11.76 and standard deviation 2=...

I am going to study gender differences and scores on the spelling test. Ind variable: Gender...

I am going to study gender differences and scores on the spelling test. Ind variable: Gender (Male or female) Dep variable: spelling test score Null: There is no difference between males and females on the spelling test. Directional: Boys will score higher than girls on the spelling test. Now, create a study.

A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy)...

A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x1 be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x2 be the empathy score of a father. A random sample of 35 mothers gave a sample mean of x1 = 67.17. Another random sample of 27 fathers gave x2 = 59.85. Assume that σ1 = 11.06 and σ2 =...

Anna would like to study more because she feels as if her scores on tests can...

Anna would like to study more because she feels as if her scores on tests can be better. Outline a step-by-step behavior modification program that might help her achieve her goal.

Question