Question 7 Use the following information to answer Question 7 and Question 8. The marks of six students in a Mathematics test are represented by the variable x. The following data was produced: n=6, Σx = 279 and Σx2 = 13 093. Find the mean and standard deviation of the following data. A. mean =46.5 , standard deviation = 5.82 B. mean = 52.5, standard deviation = 4.89 C. mean =46.5 , standard deviation = 4.89 D. mean =52.5 , standard deviation = 5.82 Question 8 It was later discovered that one of the values was incorrectly recorded as 43. The correct value, in fact, is 34. Find the new values of the mean and standard deviation. A. mean = 45 , standard deviation = 7.07 B. mean = 51, standard deviation = 6.84 C. mean = 45 , standard deviation = 6.84 D. mean = 51 , standard deviation = 7.07
Question 7
Use the following information to answer Question 7 and Question 8.
The marks of six students in a Mathematics test are represented by the variable x. The following data was
produced: n=6, Σx = 279 and Σx2
= 13 093.
Find the
A. mean =46.5 , standard deviation = 5.82
B. mean = 52.5, standard deviation = 4.89
C. mean =46.5 , standard deviation = 4.89
D. mean =52.5 , standard deviation = 5.82
Question 8
It was later discovered that one of the values was incorrectly recorded as 43. The correct value,
in fact, is 34. Find the new values of the mean and standard deviation.
A. mean = 45 , standard deviation = 7.07
B. mean = 51, standard deviation = 6.84
C. mean = 45 , standard deviation = 6.84
D. mean = 51 , standard deviation = 7.07
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