For a standardized psychology examination intended for psychology majors, the historical data show that scores have...
For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 520 and a standard deviation of 175 The grading process of this year's exam has just begun. The average score of the 35 exams graded so far is 528. What is the probability that a sample of 35 exams will have a mean score of 528 or more if the exam scores follow the same distribution as in the past?
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Answer:
Mean = 520
std dev = 175
n = 35
=> P (Z>0.27)
- 1 - P(Z<0.27)
= 1 -0.6064 = 0.3936
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For a standardized psychology examination intended for
psychology majors, the historical data show that scores have...
For a standardized psychology examination intended for psychology majors, the historical data show that scores have...
For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 520 and a standard deviation of 175. The grading process of this year's exam has just begun. The average score of the 35 exams graded so far is 508. What is the probability that a sample of 35 exams will have a mean score of 508 or more if the exam scores follow the same distribution as in the past?Carry your...
For a standardized psychology examination intended for psychology majors, the historical data show that scores have...
For a standardized psychology examination intended for psychology majors, the historical data show that scores have a mean of 500 and a standard deviation of 180 . The grading process of this year's exam has just begun. The average score of the 40 exams graded so far is 502 . What is the probability that a sample of 40 exams will have a mean score of 502 or more if the exam scores follow the same distribution as in the...
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(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sampl...
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