3) Within a school district, students were randomly assigned to one of two Math teachers ‐ Mrs. Smith and Mrs. Jones. After the assignment, Mrs. Smith had 30 students, and Mrs. Jones had 25 students.
At the end of the year, each class took the same standardized test. Mrs. Smith's students had an average test score of 78, with a standard deviation of 10; and Mrs. Jones' students had an average test score of 85, with a standard deviation of 15.
Test the hypothesis that Mrs. Smith and Mrs. Jones are equally effective teachers. Use a 0.10 level of significance.
Answers: 3
SAT, 24.06.2019 15:30
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SAT, 25.06.2019 22:00
In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.
Answers: 1
SAT, 26.06.2019 09:30
Luminous objects such as flashlights emit light that we can see. how do we see an object that isn’t luminous? a. the object emits light that reaches our eyes. b. light reflects off the object and reaches our eyes. c. light passes through the object uninterrupted. d. light is fully absorbed by the object. e. we can’t see an object that isn’t luminous.
Answers: 1
SAT, 27.06.2019 03:30
In john watson's "little albert' experiment, what was the ucs? select one: a. white rat b. loud noise c. little boy d. anything white and furry
Answers: 1
3) Within a school district, students were randomly assigned to one of two Math teachers ‐ Mrs. Smit...
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