n preparation for the 2019 Math class, Ms Yong decides to analyse the performance of the corresponding 2019 Math class. He seeks to use the results of the analysis as a benchmark for the 2019 class. At random, Ms Yong selects the following mini-test 1 marks (%) for 11 students from the 2020 class: 37, 53, 103, 53, 37, 30, 66, 68, 52, 47, 60 where the third and fourth sample moment are 7756.134 and 538709.8. To gain more insights from the performances, Ms Yong asks you to assist by answering the following: The average mini-test 1 mark (%) is ? The top 35% of the sampled 2019 Math students got a mini-test 1 mark (%) that is at least? The sum of squared sample values is ?
n preparation for the 2019 Math class, Ms Yong decides to analyse the performance of the corresponding 2019 Math class. He seeks to use the results of the analysis as a benchmark for the 2019 class. At random, Ms Yong selects the following mini-test 1 marks (%) for 11 students from the 2020 class:
37, 53, 103, 53, 37, 30, 66, 68, 52, 47, 60
where the third and fourth sample moment are 7756.134 and 538709.8.
To gain more insights from the performances, Ms Yong asks you to assist by answering the following:
- The average mini-test 1 mark (%) is ?
- The top 35% of the sampled 2019 Math students got a mini-test 1 mark (%) that is at least?
- The sum of squared sample values is ?
- The unbiased sample variance is ?
- The unbiased sample standard deviation is ?
- The standardised measure of skewness is ?
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Which one is correct:
a.The standardised measure of skewness suggests that the sample is slightly positively skewed.b.The standardised measure of skewness suggests that the sample is slightly negatively skewed.
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The standardised measure of kurtosis is ?
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Which one is correct:
a.The standardised measure of kurtosis suggests that the sample is platykurtic.
b.The standardised measure of kurtosis suggests that the sample is leptokurtic.
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