Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 26 beginning students of...
Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 26 beginning students of Russian to begin speaking practice immediately and another 26 to delay speaking for 4 weeks. At the end of the semester both groups took a standard test of comprehension of spoken Russian. Suppose that in the population of all beginning students, the test scores for early speaking vary according to the N(34, 8) distribution and scores for delayed speaking have the N(32, 6) distribution.
(a) What is the sampling distribution of the mean score x in the early speaking group in many repetitions of the experiment? (Round your answers for s to two decimal places.)
| Mean | = |
| s | = |
What is the sampling distribution of the mean score y in
the delayed speaking group?
| Mean | = |
| s | = |
(b) If the experiment were repeated many times, what would be the
sampling distribution of the difference y - x
between the mean scores in the two groups? (Round your answer for
s to two decimal places.)
| Mean | = |
| s | = |
(c) What is the probability that the experiment will find
(misleadingly) that the mean score for delayed speaking is at least
as large as that for early speaking? (Round your answer to four
decimal places.)
Homework Answers
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Does delaying oral practice hinder learning a foreign language?
Researchers randomly assigned 26 beginning students of...
Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 18 beginning students of...
Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 18 beginning students of Russian to begin speaking practice immediately and another 18 to delay speaking for 4 weeks. At the end of the semester both groups took a standard test of comprehension of spoken Russian. Suppose that in the population of all beginning students, the test scores for early speaking vary according to the N(34, 9) distribution and scores for delayed speaking have the N(27, 7) distribution....
Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 25 ...
Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 25 beginning students of Russian to begin speaking practice immediately and another 25 to delay speaking for 4 weeks. At the end of the semester both groups took a standard test of comprehension of spoken Russian. Suppose that in the population of all beginning students, the test scores for early speaking vary according to the N(27, 4) distribution and scores for delayed speaking have the N(21, 8) distribution....
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Two researchers conducted a study in which two groups of students were asked to answer 42...
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Score: 0 of 1 pt 31 of 43 (26 complete) V Score: 36.85%, 15...- 11.3.11 Question...
Score: 0 of 1 pt 31 of 43 (26 complete) V Score: 36.85%, 15...- 11.3.11 Question Help Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of...
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Two researchers conducted a study in which two groups of students were asked to answer 42...
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Two researchers conducted a study in which two groups of students were asked to answer 42 trivia questions from a board game. The students in group 1 were asked to spend 5 minutes thinking about what it would mean to be a professor, while the students in group 2 were asked to think about soccer hooligans. These pretest thoughts are a form of priming. The 200 students in group 1 had a mean score of 25.3 with a standard deviation...
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students for a learning experiment decides to select a random
sample of female college
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psychologist administers an IQ test to both groups to determine if
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population standard deviation for this IQ test is know to be
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