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WorksheetsStudy Comrade | Data Analytics Quiz3
Total questions: 15
Worksheet time: 6mins
._______ can be defined as the data points within a data set that varies largely in comparison to other observations
Median
range
outlier
inlier
________ states that 80% of the effects or results in an experiment are obtained from 20% of the causes
range
median
statistics
pareto principle
What is the formula for range ?
H + L
L * H
L - H
H - L
What is the goal of descriptive statistics ?
analyzing and interpreting the set of data
summarizing and explaining the set of data
Monitoring and maniplutating the set of data
All of these
In a case distribution is skewed to the left , then it is _____ ?
Positively skewed
Negatively skewed
Symmetrically skewed
none of th above
What is the denominator of z formula?
The standard deviation
the difference between score and mean
the mean
the range
______ represents a population parameter?
SD
s
r
None
For predicting the score on a post training testFroFrom the number of years of education and the score on the aptitude test given before training.
given the regression equation is given as ,Y =25+.5X1+10X2,where X1 =years of education and X2 = aptitude teat score . What is the predicted score for someone with 10 years of education and an aptitude test score of 5 ?
25
50
35
80
Approximately _________percentage of scores Fall within one standard deviation of the mean in a normal distribution ?
0.95
0.34
0.99
0.68
._________ refers to a set of procedures that has been used to Predict the values of a dependent variable based on the values of one or more independent variables
Regression analysis
Regression coefficient
Regression equation
Regression line
The intervals should be ________in a grouped frequency distribution.
Mutually exclusive
Exhaustive
Both of these
None of these
What is a standard deviation ?
The square root of the variance
The measure of variability
An approximate indicator of how numbers vary from the mean
All of these
Which of the following options interpret like a null hypothesis?
The coin is not fair
There is a correlation in the population
There is no difference between male and female incomes in the population
The defendant is guilty
Which of the following is used when you want to visually examine the relation between two quantitative variables ?
Bar graphs
Pie graphs
Scatterplots
Line graphs
How do you interpret 95% confidence interval?
The process used will capture the true parameter 95% of the time in the long run
You can be 95% confident that your interval will include the population parameter
You can be 5% confident that your interval will not include the population parameter
All of these
