it has the multiple choice question and then the first 2 blanks are asking \"how
ID: 3206482 • Letter: I
Question
it has the multiple choice question and then the first 2 blanks are asking "how many standard deviations"
Hd The National Assessment of Educational Progress (NAEP) conducts a nationwide assessment of students' proficiency in nine subjects: mathematics, reading, writing, science, the arts, civics, economics, geography, and U.S. history. The main NAEP assessments are conducted annually on samples of students from grades 4, 8, and 12. In 2001, the geography scores for male students had a mean of 264 with a standard deviation of 34. Assume that these scores are normally distributed with the given mean and standard deviation. Which of the following are properties of the normal curve representing the distribution of the scores? Check all that apply. A quarter of the total area under the curve is above 264. The curve is symmetrical about a vertical line through 332. The curve is bell shaped, with a single peak over 264. O The curve is symmetrical about a vertical line through 264. The two ends of the curve approach the horizontal axis but never touch it. One-half of the total area under the curve is below 264. The value 162 is How many standa devAlbelow the mean, and the value 366 is How many standad de sms above the mean. Therefore, of the male students have scores between 162 and 366. Flash Player WIN 24,0,0,194 3 3.34.1 2004-2016 Aplia, All rights reserved. Grade t NOW Save & Continue 2013 Cengage Learning except as noted All rights reserved.Explanation / Answer
Mean=264,SD=34
1)Half of the curve is above 264 not quarter->False
The curve is symetterical about the vertical line at 264 not 332->False
Curve is bell shaped with a single peak->True
Curve is symettrical about 264->True
The two ends approach horizontal axis but dont touch->True
One half under 264->True
2)(162-264)/34=3SD below mean
(366-264)/34=3SD above the mean
Hence Prob=P(-3<Z<3)=0.9973
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