Mathematics, 16.04.2020 02:56, ohshushan2
There is a government-sponsored study of student achievement in large urban school districts. They give a reading test scored from 0 to 500. A score of 232 is a "basic" reading level and a score of 270 is "proficient." Scores for a random sample of 1400 eighth-graders in a city had x = 237 with standard error 1.0.
We don't have the 1400 individual scores, but use of the t procedures is surely safe. Why?
A. Test scores are always normally distributed.
B. A random sample should be normally distributed.
C. The sample size is very large, so the only potential hazard is extreme skewness.
D. A small sample size of a simple random sample should be normally distributed.
Answers: 3
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Ascale drawing of a lake has a scale of 1 cm to 80 m. if the actual width of the lake is 1000 m what is the width of the lake on the scale drawing
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Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?
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Find the value of p for which the polynomial 3x^3 -x^2 + px +1 is exactly divisible by x-1, hence factorise the polynomial
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There is a government-sponsored study of student achievement in large urban school districts. They g...
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