Homework Clinic
Mathematics Clinic => Grade 11 and 12 Mathematics => Topic started by: elizabeth18 on Jul 24, 2018
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A result is called statistically significant whenever
a. the null hypothesis is true.
b. the alternative hypothesis is true.
c. the p-value is less than or equal to the significance level.
d. the p-value is larger than the significance level.
Question 2
Exam scores for a large introductory statistics class follow an approximate normal distribution with an average score of 56 and a standard deviation of 5 . The average exam score in your lab was 59.5 . The 20 students in your lab sections will be considered a random sample of all students who take this class. What is the probability that the average score of a random sample of 20 students exceeds 59.5?
a. < 0.0001
b. 0.0009
c. 0.0026
d. 0.2420
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Answer to Question 1
C
Answer to Question 2
B