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For college-bound high school seniors from a certain midwestern city, math scores on the Scholastic Aptitude Test (SAT) averaged 480, with a standard deviation of 100. Assume that the distribution of math scores is bell shaped and symmetrical.
a. What is the approximate percentage of scores that were between 380 and 580?
b. What is the approximate percentage of scores that were above 680?
c. Charlie scored 580 on the math portion of the SAT. What is the approximate percentage of students who scored lower than Charlie?
d. Betty scored 680 on the math portion of the SAT. What is the approximate percentage of students who scored higher than Charlie but lower than Betty?
During the 2004 election year, new polling results were reported daily. In an IBD/TIPP poll of 910 adults, 503 respondents reported that they were optimistic about the national outlook, and The President's leadership index jumped 4.7 points to 55...
Describes how animals and humans experience positive emotions and interact with others and with their surroundings
1) Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
Three years ago, the admissions office for Ivy College began using exponential smoothing with a smoothing constant of 0.25 to forecast the number of applications for admission each year.
DAY 1. Multiply the three matrices together in order (A*B*C) to get a fourth matrix 'D'. What is the fourth matrix? DAY 2. Multiply the fourth matrix by the scalar 6 to get a fifth matrix E.
Parameterize the function such that those spreadsheets are automatically saved in an open format (pdf, eps, jpg, etc.).
Exponential distribution with a mean of 4 minutes. What is the probability that a person is served in less than 3 minutes on at least 4 of the next 6 days.
A sample has just been taken with the following lengths: 21.25, 22.0, 21.5, 20.75, 21.25, 21.35, 21.35, 21.35, 21.35, 21.35, 21.35, and 21.35. Is the new seamstress performing at an acceptable quality level?
there are 40 students in an elementary statistics class. on the basis of years of experience the instructor knows that
The following data are the median returns on investment, in percent, for 10 industries.- Find the median of these medians and their mean.
Same survey showed that average length of time each store was in bbusiness is 6 years, with standard deviation of 25 years. Which is more variable, number of magazines or number of years.
using the table of continuous data below how would i compute the 25th 50th and 75th percentiles?2512897456563474
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