Statistics Test
For a given set of returns data, converting the data from returns, to returns measured in percent will result in a sample mean and sample standard deviation that is 100 times larger.
True
False
If a histogram has a long right tail and short left tail, the median will be above the mean.
True
False
If the sample covariance is near 1 then there must be a very strong positive relationship between the two variables.
True
False
For any continuous random variable X, Pr(μ - σ< X < μ + σ) = .68.
True
False
If two random variables X and Y are independent then the correlation must be zero.
True
False
Standardized values from a data set obtained by subtracting the mean and dividing by the standard deviation that are larger than three are always very rare events.
True
False
If X and Y are identically distributed random variables, they have the same mean and variance.
True
False
Given the dataset: 1, 3, 2, 3, 5 what is the sample average?
3
2
2.5
2.8
None of the above
Given the dataset: 1, 3, 2, 3, 5 what is the sample variance?
2.1
2.2
2.3
4
None of the above
The probability that it will take more than 2 visits?
0.8
0.2
0.55
1
None of the above
Given that it takes more than one visit, what is the probability that it will take 4 visits?
0.05
0.3352
0.3751
0.125
None of the above
Which is true:
a. The correlation is about 0.7 and the point (*) has a positive residual.
a. The correlation is about 0.7 and the point (*) has a negative residual.
The correlation is about -0.7 and the point (*) has a positive residual
The correlation is about -0.7 and the point (*) has a negative residual.
None of the above.
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