Mathematics, 13.04.2021 01:00, sniron
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: 2
Mathematics, 21.06.2019 18:00, phamleson8697
Use the distributive law to multiply. 3(4x + 5y + 6)
Answers: 2
Mathematics, 21.06.2019 19:00, breannaasmith1122
Which of the expressions (on the photo document i inserted) together represent all solutions to the following equation? 8cos(12x)+4=-4 *the answer should be in degrees.* > i would like for someone to explain the process to find the solutions for this.
Answers: 2
Mathematics, 21.06.2019 19:30, ray2220
The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)
Answers: 3
There is a government-sponsored study of student achievement in large urban school districts. They g...
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