BESC 3010 - TEST 2 QUESTIONS AND ANSWERS | LATEST UPDATE | 2024/2025 | GRADED A+
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BESC 3010 -
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BESC 3010 -
BESC 3010 - TEST 2 QUESTIONS AND
ANSWERS | LATEST UPDATE |
2024/2025 | GRADED A+
What is the purpose of a confidence interval in statistics?
A) To describe the spread of data
B) To estimate a population parameter with a certain level of confidence
C) To calculate the exact value of the para...
BESC 3010 - TEST 2 QUESTIONS AND
ANSWERS | LATEST UPDATE |
2024/2025 | GRADED A+
What is the purpose of a confidence interval in statistics?
A) To describe the spread of data
B) To estimate a population parameter with a certain level of confidence
C) To calculate the exact value of the parameter
D) To determine the correlation between two variables
✔✔B) To estimate a population parameter with a certain level of confidence
When using a t-test, which condition must typically be met?
A) The data must be nominal
B) The sample size must be exactly 100
C) The data should approximately follow a normal distribution
D) The data should only include whole numbers
✔✔C) The data should approximately follow a normal distribution
If two variables have a strong negative correlation, what does this imply?
1
,A) As one variable increases, the other also increases
B) As one variable increases, the other decreases
C) There is no relationship between the variables
D) Both variables stay constant
✔✔B) As one variable increases, the other decreases
What does a p-value of 0.03 indicate in hypothesis testing with a significance level of 0.05?
A) The null hypothesis is rejected
B) The null hypothesis is accepted
C) There is no relationship between variables
D) A larger sample is needed
✔✔A) The null hypothesis is rejected
What does a high standard deviation signify about a dataset?
A) Data points are closely clustered around the mean
B) There is more variability in the dataset
C) The dataset has only a few unique values
D) The data points are all identical
2
, ✔✔B) There is more variability in the dataset
When calculating the mean of a dataset, what is being determined?
A) The most frequently occurring value
B) The central tendency of data
C) The minimum value
D) The range of data
✔✔B) The central tendency of data
In a normal distribution, what percentage of data typically falls within one standard deviation of
the mean?
A) 50%
B) 68%
C) 75%
D) 95%
✔✔B) 68%
What is the purpose of a hypothesis test in statistics?
3
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