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The national average for the math portion of the College Board's SAT test is 524. The College Board periodically rescales the test scores such that the standard deviation is approximately 50. Answer the following questions using a bell-shaped distribution and the empirical rule for the math test scores. If required, round your answers to two decimal places.
(a) What percentage of students have an SAT math score greater than 574?
(b) What percentage of students have an SAT math score greater than 624?
(c) What percentage of students have an SAT math score between 474 and 524?
(d) What is the z-score for student with an SAT math score of 625?
(e) What is the z-score for a student with an SAT math score of 415?
A population consists of the following N = 5 scores: 0, 6, 4, 3, and 12- Compute µ and s for the population.
So decide to exercise by playing at least one game every day. To avoid but very tired , decides not to play more than 12 games a week. Prove that there are a number of consecutive days that will just play 21 games.
You have been given the following extract from a scoring model used to compare three products, A, B and C, in terms of marketing:
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Twenty-six countries won medals in the 2010 Winter Olympics. The following table lists them, along with the total number of medals each won.
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At.01 level of significance, is proportion of seeds which germinate dependent on seed type?
a team of psychologists studying narcolepsy a sleep disorder characterized by sudden nodding off during the day decided
Bill calculates a linear correlation coefficient between two variable as 1.20. How would you interpret this?
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
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