Which of the following best describes a Type II error?
Rejecting the null hypothesis when it is actually true.
Failing to reject the null hypothesis when it is actually false.
Rejecting the alternative hypothesis when it is actually true.
Accepting the alternative hypothesis when it is actually false.
Which type of error occurs when we reject a true null hypothesis?
Type III error
Sampling error
Type I error
Type II error
Which of the following is NOT a characteristic of a normal distribution?
Asymmetry with a longer tail on one side
Bell-shaped and symmetrical
Mean, median, and mode are equal
The total area under the curve equals 1
Which of the following data types is most suitable for storing the number of children in a family?
Continuous
Nominal
Discrete
Ordinal
If the range of a dataset is 20, and the smallest value is 5, what is the largest value?
15
20
25
Cannot be determined
If you roll a fair six-sided die, what is the probability of getting an even number?
1/3
2/3
1/2
1/6
Descriptive statistics primarily deals with:
Testing hypotheses about population parameters
Summarizing and visualizing existing data
Drawing conclusions about populations from samples
Predicting future outcomes based on data trends
What is the range of the following dataset: 7, 12, 4, 9, 15, 11?
11
8
4
What level of measurement is represented by the ranking of restaurants from 1 to 5 stars?
Interval
Ratio
What is the primary difference between a discrete probability distribution and a continuous probability distribution?
Discrete distributions are used for quantitative data, while continuous distributions are used for qualitative data.
There is no difference; both types of distributions represent the same statistical concepts.
Discrete distributions are represented by graphs, while continuous distributions are represented by tables.
Discrete distributions deal with countable data, while continuous distributions deal with data that can take on any value within a range.