A researcher wants to asses the self-discipline levels among undergraduate and graduate students. A random sample of 300 undergraduate students was selected with average score of 184 and standard deviation of 16 ( group 1). Also , a random sample of 350 graduate students was selected with average score of 153 and standard deviation of 21 ( group 2). Is this enough evidence to conclude that undergraduate students score less, on average than the graduate students. [ assume that the population variances are equals]. i. What is the value of the pooled sample variance for the difference between the sample means? ONone of these 01.48 O16.15 O355.64 O18.86

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A researcher wants to asses the self-discipline
levels among undergraduate and graduate
students. A random sample of 300
undergraduate students was selected with
average score of 184 and standard deviation of
16 ( group 1). Also , a random sample of 350
graduate students was selected with average
score of 153 and standard deviation of 21 (
group 2). Is this enough evidence to conclude
that undergraduate students score less, on
average than the graduate students. [ assume
that the population variances are equals].
i. What is the value of the pooled sample
variance for the difference between the sample
means?
ONone of these
01.48
O16.15
O355.64
O18.86
Transcribed Image Text:A researcher wants to asses the self-discipline levels among undergraduate and graduate students. A random sample of 300 undergraduate students was selected with average score of 184 and standard deviation of 16 ( group 1). Also , a random sample of 350 graduate students was selected with average score of 153 and standard deviation of 21 ( group 2). Is this enough evidence to conclude that undergraduate students score less, on average than the graduate students. [ assume that the population variances are equals]. i. What is the value of the pooled sample variance for the difference between the sample means? ONone of these 01.48 O16.15 O355.64 O18.86
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