subject
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.

ansver
Answers: 2

Another question on Mathematics

question
Mathematics, 21.06.2019 17:30
If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)
Answers: 1
question
Mathematics, 21.06.2019 22:30
We have 339 ounces of jam to be divided up equally for 12 people how muny ounces will each person get
Answers: 1
question
Mathematics, 22.06.2019 01:00
Multiply and simplify. 2x2y3z2 · 4xy4x2 how to do?
Answers: 1
question
Mathematics, 22.06.2019 01:00
Harry is at the depot in dover and has deliveries to make in edinburgh, glasgow and aberdeen. from dover which of the deliveries is the shortest distance?
Answers: 1
You know the right answer?
There is a government-sponsored study of student achievement in large urban school districts. They g...
Questions
question
Biology, 11.06.2020 19:57
question
Business, 11.06.2020 19:57
question
Chemistry, 11.06.2020 19:57
question
Chemistry, 11.06.2020 19:57
question
Chemistry, 11.06.2020 19:57
question
Spanish, 11.06.2020 19:57
question
Mathematics, 11.06.2020 19:57
Questions on the website: 13722367