According to the 68-95-99.7 Rule, 99.7% of high school seniors had SAT scores between what and what?
According to the 68-95-99.7 Rule, 99.7% of high school seniors had SAT scores between what and...
An SRS of 380 high school seniors gained an average of ?¯=20.23 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ=47.28. We want to estimate the mean change in score ?μ in the population of all high school seniors. (a) Using the 68 – 95 – 99.7 Rule or the ?-table (Table A), give a 95% confidence interval (?,?) for ? based on this sample....
An SRS of 380 high school seniors gained an average of.... An SRS of 380 high school seniors gained an average of -23.11 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ = 48.85. We want to estimate the mean change in score μ in the population of all high school seniors. (a) Using the 68-95-99.7 Rule or the z-table (Table A), give a 99.7%...
2.) High school seniors' SAT scores are normally distributed with μ = 1050 and σ = 100. If a student is selected at random, find the probability that her SAT score is: a.) above 1200 b.) below 890 c.) between 1000 and 1100 d.) What SAT score separates the smartest 4% of students? e). If 18 seniors are selected, find the probability that their mean SAT score is above 1150 3.) A survey of 200 college students revealed that 160 of them eat dessert...
13. 10 pts. The following are the math SAT scores of 15 high school seniors from three different high schools. Apply the Kruskal-Wallis test to determine whether there is a difference in SAT scores between the three high schools using a 0.05: . School 1: 498, 582, 527, 480, 549 . School 2: 435, 360, 372, 413, 512 . School 3: 608, 515, 661, 637, 554
According to the 68-95-99.7 rule what percent of the population are more than 2 standard deviations away from the mean? A) 5 B) 2.5 c) 95 d) 68
Based on the 68-95-99.7 rule, what part of all possible values occur between -3 and +1 standard deviations? None of the answers are correct 68% 95% 99.7% 83.85%
1. Suppose the scores for high school seniors on the verbal portion of the SAT test have a population mean of 509 and a population standard deviation of 112. a. List the population and the variable. b. What do you know about the population distribution of SAT scores for high school seniors? (i.e. shape, center, spread) c. Suppose we randomly select 56 high school seniors from this population. What would you expect the shape, mean and standard deviation of the...
4) In the 2014–2015 academic year, 1,108,165 high school seniors took the SAT. That year the mean of the scores from the math portion was 501 with a standard deviation of 117. What percentage scored between 600 and 700 points? Round to the second decimal place (0.12). 5) In the 2014–2015 academic year, 1,108,165 high school seniors took the SAT. That year the mean of the scores from the math portion was 501 with a standard deviation of 117. If...
Use the 68-95-99.7 rule to approximate what proportion of observations in N(70,5) distribution fall between 70 and 80. (Show your answer in percentage.)
An SRS of 380 high school seniors gained an average of i -23.51 points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation σ 48.51, we want to estimate the mean change in score u in the population of all high school seniors. (a) Using the 68-95-99.7 Rule or the z-table (Table A), give a 95% confidence interval (a, b) for based on this sample. Enter your...