(Type integers or decimals rounded to two decimal places as needed.) 6, B. An IQ
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(Type integers or decimals rounded to two decimal places as needed.) 6, B. An IQ of 120 is more unusual because its corresponding z-score, from 0 than the corresponding z-score of (Type integers or decimals rounded to two decimal places as needed.) Both IQs are equally likely. is further for an IQ of 95 ° C. 13. Babies born weighing 2500 grams (about 5.5 pounds) or less are called low-birth-weight babies, and this condition a certain country is about 3484 grams (about 7.7 pounds). The mean birth weight for babies born one month early is 2639 grams. Suppose both standard deviations are 460 grams. Also assume that the distribution of birth weights is roughly unimodal and symmetric Complete parts a through c below. a. Find the standardized score (z-score), relative to all births in the country, for a baby with a birth weight of 2500 grams 2 Round to two decimal places as needed.) score for a birth weight of 2500 grams for a child born one month early, using 2639 as the mean. (Round to two decimal places as needed.) e. For which group is a birth weight of 2500 grams more common? Explain what hat implies·Unusual z-scores are ar from 0. Choose the correct answer below. A. Abi th eight of 2500 grams is more conmmon for all births inthe country. This makes sense because the group of all births in the country is much larger than the group of births that are one month early. Therefore, more babies will have low birth weights among all births in the country A birth weight of 2500 grams is more common for babies born one month earty. This makes sense because babies gain weight during gestation, and babies born one month early had less time to gain weight O B. O C. O D· A birth weight of 2500 is equally as common to both groups. It cannot be determined to which group a birth weight of 2500 grams is more common. 14. Fill in the blank below will be within two standard deviations of the mean. According to the Empirical Rule According to the Empirical Rule, (1) (1) O approximately 68% of the observations will be within two standard deviations of the mean. O nearly all of the observations ( O approximately 90% of the observations approximately 95% of the observations emprod pearsoncmg.com/apivi/print/mathExplanation / Answer
13)
as z score =(X-mean)/std deviation
a) z score =(2500-3484)/460 = -2.14
b) z score =(2500-2639)/460 =-0.30
option B is correct
14)
1) approximately 95% of the observations will be with in 2 standard deviation
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