Values of IQ score are distrubted approximately according to a normal distribution with mean 100 and standard deviation 15. What proportion of the population has a value above 130? Below 85? Above 85?
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Values of IQ score are distrubted approximately according to a normal distribution with mean 100 and standard deviation 15. What proportion of the population has a value above 130? Below 85? Above 85?
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- The heritability of intelligence as measured by IQ tests changes with socioeconomic status (SES). When participants are of high SES, heritability is high; when participants are of low SES, heritability is near zero. Which statement best explains this observation? monozygotic (MZ) twins occur less frequently amongst parents of high SES monozygotic (MZ) twins occur less frequently amongst parents of low SES there is greater variation in IQ scores amongst participants of high SES there is greater variation in IQ scores amongst participants of low SES heritability only applies to the specific population and specific environment in which it is measuredAn average IQ is between ______ - ______ , which is within 1 standard deviation of the mean. 100-150 90-110 75-125 85-115Are traditional IQ testing scales relevant today?
- A motor skill showing a correlation of r = .95 between the performance of a parent and child: Shows high heritability and a strong influence of genetics Shows high heritability and a weak influence of genetics Shows low heritability and a strong influence of genetics Shows low heritability and weak influence of geneticsSuppose that the mean IQ in the United States is roughly 100 and the standard deviation is 15 points. People with IQs of 145 or higher are considered “geniuses” on some scales of measurement. What percentage of the population is expected to have an IQ of 145 or higher? In a country with 300 million people, how many geniuses are there expected to be?What type of variable would age be considered? Sex? Height? Income status? Options:Discrete, Nominal,Continous, Ordinal
- I'm having trouble finding the dependent and independent variables of this scenaro: Average IQ scores for young school children are known to be 100 (SD = 15). However, the literature indicates that children’s intelligence may be decreased if their mothers have German measles during pregnancy. Using hospital records, a researcher obtained a sample of n = 25 school children whose mothers all had German measles during their pregnancies. Do the data indicate that children born to mothers who had German measles during the pregnancy have significantly lower IQ scores than typical young school children?Give only typing answer with explanation and conclusion Which statistical test would you choose for the following hypothesis? "There will be a difference in scores on a measure of depression before and after taking part in a statistics lecture".A personality psychologist is interested if being a snob is heritable. To answer this question a personality psychologist recruits a huge sample of 2,593 identical twins and found that identical twins were similar in how snobby they were with an effect size of r=0.6. They also recruit a huge sample of 1845 fraternal twins and found that fraternal twins were also similar in how snobby they were with an effect size of r=0.4. Calculate the heritability coefficient for being a snob.
- The Flynn effect is well known phenomenon in psychology. It states that, when using thesame IQ test, test subjects born later generally receive higher scores than test subjects born earlier.Therefore, being born later correlates with higher IQ test scores (if the tests aren’t changed). Wouldit be correct to say that being younger causes you to have a higher IQ? Why or why not?Identify which one of the four types of validity: measurement validity, statistical conclusion validity, internal validity, or external validity-is it violated in each of the following scenarios? Explain your decision. After a successful Phase 3 clinical trial in which their new drug improved symptoms in children with asthma, the pharmaceutical company announced in a press release that it had developed an asthma drug that the whole family can use. As a test of intelligence, researchers administered a 40-question American history test to the study participants. The average Score was 15 correct out of 40, thus researchers concluded that study participants are not very intelligent.What is the independent variable in the graph? 100 06 80 70 60 aries 50 ructional 40 Ey 30 20 10 4. 8 10 12 Time spent studying (hours) O Exam Score (%) O Time Spent Studying (hours) Exam score (%)