Q1) Marks in subject A are scaled to have a normal distribution. The marks obtained by a sample of 8 students in the exam for this subject have mean 54 and standard deviation of 9.1. The marks obtained by a different sample of 8 students, in the same exam, have mean 59 and standard deviation 7.7. The value of the pooled standard deviation is 8.42912. The absolute value of the test statistic for comparing means is ________ (2 dp) Q2)Marks in two subjects, A and B, are scaled to have a normal distribution. The marks obtained by 8 students in exam A have mean 60.
Q1)
Marks in subject A are scaled to have a
The marks obtained by a different sample of 8 students, in the same exam, have mean 59 and standard deviation 7.7.
The value of the pooled standard deviation is 8.42912.
The absolute value of the test statistic for comparing means is ________ (2 dp)
Q2)Marks in two subjects, A and B, are scaled to have a normal distribution.
The marks obtained by 8 students in exam A have mean 60.
The marks obtained by the same 8 students in exam B have mean 68.
The standard deviation of the differences in their marks is 7.5.
The absolute value of the test statistic for comparing means is _____ (2 dp)
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