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Biostatistics (PCMA101-LB222021) Module 4: Check-in
Activity 2 Q&A
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, Biostatistics (PCMA101-LB222021)
Module 4: Check-in Activity 2
Please answer the following. You may use excel for the computation although I suggest that you solve
problem no. 4 manually. You can still use the manual computation if you have difficulty of using the
Excel. You may compute manually the mean and standard deviation and follow the examples in the
lecture to do the step by step process of hypothesis testing.
1. The grades of college Freshmen selected at random enrolled in College Algebra using 2 different
methods of teaching namely Traditional and Computer Aided Instruction, are as follows:
Traditional Computer Aided
Instruction
2.0 1.25
2.75 1.5
1.5 1.75
2.25 2.0
2.5 1.75
1.5 2.0
2.25 1.25
1.50 1.5
1.75 1.75
2.5 1.25
2.5
Determine if there is a significant difference in the grades of the students resulting from the use of two
different methods of teaching at .05 level of significance.
Answer:
Ho = There no significant difference in the grades of the students from the use of two different methods
of teaching.
Ha = there is a significant difference in the grades of the students from the use of two different methods
of teaching.
t-Test: Two-Sample Assuming Unequal Variances
Variable 1 Variable 2
Mean 2.090909091 1.6
Variance 0.215909091 0.08611111 0.46466 0.293447
Observations 11 10
Hypothesized Mean Difference 0
df 17
t Stat 2.921290867
P(T<=t) one-tail 0.004761375
t Critical one-tail 1.739606726
P(T<=t) two-tail 0.009522749
t Critical two-tail 2.109815578
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Method of Mean S.D. t-value Critical/Tabular Significance
Teaching Value
SD
Traditional 2.090909091 0.46466 2.921290867 2.109815578 There is a
Scholarfriends
Biostatistics (PCMA101-LB222021) Module 4: Check-in
Activity 2 Q&A
https://scholarfriends.com
Downloaded by: | https://scholarfriends.com/singlePaper/622076/biostatistics-pcma101-lb222021-
module-4-check-in-activity-2-qa
Distribution of this document is illegal.
, Biostatistics (PCMA101-LB222021)
Module 4: Check-in Activity 2
Please answer the following. You may use excel for the computation although I suggest that you solve
problem no. 4 manually. You can still use the manual computation if you have difficulty of using the
Excel. You may compute manually the mean and standard deviation and follow the examples in the
lecture to do the step by step process of hypothesis testing.
1. The grades of college Freshmen selected at random enrolled in College Algebra using 2 different
methods of teaching namely Traditional and Computer Aided Instruction, are as follows:
Traditional Computer Aided
Instruction
2.0 1.25
2.75 1.5
1.5 1.75
2.25 2.0
2.5 1.75
1.5 2.0
2.25 1.25
1.50 1.5
1.75 1.75
2.5 1.25
2.5
Determine if there is a significant difference in the grades of the students resulting from the use of two
different methods of teaching at .05 level of significance.
Answer:
Ho = There no significant difference in the grades of the students from the use of two different methods
of teaching.
Ha = there is a significant difference in the grades of the students from the use of two different methods
of teaching.
t-Test: Two-Sample Assuming Unequal Variances
Variable 1 Variable 2
Mean 2.090909091 1.6
Variance 0.215909091 0.08611111 0.46466 0.293447
Observations 11 10
Hypothesized Mean Difference 0
df 17
t Stat 2.921290867
P(T<=t) one-tail 0.004761375
t Critical one-tail 1.739606726
P(T<=t) two-tail 0.009522749
t Critical two-tail 2.109815578
Downloaded from Scholarfriends.com
Method of Mean S.D. t-value Critical/Tabular Significance
Teaching Value
SD
Traditional 2.090909091 0.46466 2.921290867 2.109815578 There is a
