ISDS 361A FINAL RECIEW EXAM
QUESTIONS AND ANSWERS 2026
VERIFIED.
What are the different data sources?
Public source
Designed experiment
Survey and observation studies
All of the above - ANS All of the above
Five drivers were selected to test drive two makes of automobiles. The following table shows
the number of miles per gallon for each driver driving each car. - ANS 7 Two-Factor Without
Replication
For a positively skewed distribution - ANS Mean is greater than the median
For a random variable X with mean = 10 and variance = 25, what is P(X > 20)? - ANS P(Z > 2)
Z-score = (x - mean) / sqrt(variance) = 2
For the following hypothesis test,
H0: μ ≥ 150
Ha: μ < 150
the test statistic - ANS can be either negative or positive.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 8
, Chebyshev's Theorem is more precise than Empirical rule. - ANS False
How does the standard error of the sampling distribution behave as the sample size (n)
increases? - ANS Decreases
If a value is more than the Upper limit or less than the Lower limit, it is considered an -
ANS Outlier
If there are 5 blocks used in a randomized block design, the degrees of freedom associated with
the Sum of Squares sue to blocks (SSBL) in ANOVA is: - ANS 4
Your answer is correct.
# of Block = b, df for SSBL = b - 1
If we reject the null hypothesis H0: μ1 ≤ μ2, against the alternative hypothesis Ha: μ1 > μ2 we
conclude that - ANS The mean of population 1 is significantly greater than that of population
2
In an analysis of variance problem involving 3 treatments and 10 observations per treatment,
SSE = 399.6. The MSE for this situation is - ANS 14.8
MSE = SSE/(n_T - k)
n_T= 3 * 10
k=3
In hypothesis testing, the level of significance, α, represents - ANS The probability of making
Type I error
In linear regression if the estimated equation fits all the data values perfectly, the value of R2
would be - ANS 1
Coefficient of determination ranges from 0 to 1.
The higher it is, the better fitting
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 8
QUESTIONS AND ANSWERS 2026
VERIFIED.
What are the different data sources?
Public source
Designed experiment
Survey and observation studies
All of the above - ANS All of the above
Five drivers were selected to test drive two makes of automobiles. The following table shows
the number of miles per gallon for each driver driving each car. - ANS 7 Two-Factor Without
Replication
For a positively skewed distribution - ANS Mean is greater than the median
For a random variable X with mean = 10 and variance = 25, what is P(X > 20)? - ANS P(Z > 2)
Z-score = (x - mean) / sqrt(variance) = 2
For the following hypothesis test,
H0: μ ≥ 150
Ha: μ < 150
the test statistic - ANS can be either negative or positive.
@COPYRIGHT ALL RIGHTS RESERVED PAGE 1 OF 8
, Chebyshev's Theorem is more precise than Empirical rule. - ANS False
How does the standard error of the sampling distribution behave as the sample size (n)
increases? - ANS Decreases
If a value is more than the Upper limit or less than the Lower limit, it is considered an -
ANS Outlier
If there are 5 blocks used in a randomized block design, the degrees of freedom associated with
the Sum of Squares sue to blocks (SSBL) in ANOVA is: - ANS 4
Your answer is correct.
# of Block = b, df for SSBL = b - 1
If we reject the null hypothesis H0: μ1 ≤ μ2, against the alternative hypothesis Ha: μ1 > μ2 we
conclude that - ANS The mean of population 1 is significantly greater than that of population
2
In an analysis of variance problem involving 3 treatments and 10 observations per treatment,
SSE = 399.6. The MSE for this situation is - ANS 14.8
MSE = SSE/(n_T - k)
n_T= 3 * 10
k=3
In hypothesis testing, the level of significance, α, represents - ANS The probability of making
Type I error
In linear regression if the estimated equation fits all the data values perfectly, the value of R2
would be - ANS 1
Coefficient of determination ranges from 0 to 1.
The higher it is, the better fitting
@COPYRIGHT ALL RIGHTS RESERVED PAGE 2 OF 8
