Statistics for Data Science Quiz

Auto audio on: the next questions will be read aloud when you click Continue.

1. 1

   What is the mean of the data set: 5, 10, 15, 20, 25?

   A 15 B 20 C 10
2. 2

   Which measure of central tendency is most affected by outliers?

   A Mode B Mean C Median
3. 3

   In a normal distribution, what percentage of data falls within one standard deviation from the mean?

   A 68% B 95% C 99.7%
4. 4

   Which is not a measure of dispersion?

   A Standard deviation B Variance C Mode
5. 5

   What is the probability of rolling a 3 on a fair six-sided die?

   A 1/6 B 1/6 C 1/3
6. 6

   What does a p-value indicate in hypothesis testing?

   A Significance level B Sample size C Probability of obtaining the observed data, assuming the null hypothesis is true
7. 7

   What is the median of this dataset: 2, 3, 5, 8, 10?

   A 5.5 B 6 C 5
8. 8

   What does a confidence interval provide?

   A The exact value of the parameter B A range of values for the parameter also acknowledging sampling variability C The expected sample mean
9. 9

   How is skewness of the data defined?

   A Asymmetry of the distribution B The kurtosis C Lack of dispersion
10. 10

    What is a Type I error in hypothesis testing?

    A Failing to reject a true null hypothesis B Rejecting a true null hypothesis C Accepting a false null hypothesis