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DBA Lecture 1 Revision Flashcards | StudBud

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Skew refers to the

What is a significance level?

DBA Lecture 1 Revision

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Answers

1
What is a significance level?
level at which statistics finally become meaningful
pre-set level of probability what the results are correct
pre-set level of probability that results are not due to chance
impact that reporting statistics incorrectly could have
2
Skew refers to the
heaviness of tails
kurtosis
platykurtic
symmetry of the distribution
3
Mean number of insurance quotations a person makes is 26 with SD of 4, what is the zscore for score of 18?
11
-2
2
-1.41
4
A hypothesis is:
act of disproving a theory
prediction from a theory
none of the above
principles that explainknown findings
5
The standard deviation is the square root of?
The coefficient of determination
Variance
Range
Sum of squares
6
What is not a synonym of independent variable?
proposed cause
predictor variable
manipulated variable
outcome
7
The normal distribution is:
tall
square
symmetrical
flat
8
Mode means
several high scores
average
most frequent score
middle score
9
A frequency distribution in which low scores are most frequent (i.e. bars on graph are highest on left) is said to be
Leptokurtic
Positively skewed
Negatively skewed
Platykurtic
10
Organizations with employee training programmes employ fewer men or women. What is dependent variable?
organizations
women
men or women
men