The probability of an event happening is 0.3. What is the probability of the event NOT happening?
0.7
0.6
0.3
1
A researcher wants to study the sleeping habits of college students. They survey 100 students from their university. What is the population in this scenario?
All college students in the world
The 100 students surveyed
All college students at the researcher's university
Students who sleep less than 6 hours a night
A researcher wants to study the opinions of nurses in a hospital. They randomly select 5 departments and then survey every nurse in those departments. What sampling method is being used?
Stratified Sampling
Systematic Sampling
Cluster Sampling
Simple Random Sampling
A bag contains 5 red balls and 3 blue balls. What is the probability of drawing a red ball at random?
3/8
3/5
5/8
1/2
The temperature in Celsius is an example of what level of measurement?
Ratio
Interval
Nominal
Ordinal
The 25th percentile is also known as the:
Second Quartile
Third Quartile
First Quartile
Interquartile Range
What is the primary goal of hypothesis testing in statistics?
To prove the null hypothesis is true.
To calculate the exact value of the population parameter.
To determine the likelihood of observing the data if the null hypothesis were true.
To prove the alternative hypothesis is true.
Which of the following best describes a Type II error?
Accepting the alternative hypothesis when it is actually false.
Failing to reject the null hypothesis when it is actually false.
Rejecting the alternative hypothesis when it is actually true.
Rejecting the null hypothesis when it is actually true.
What is the alternative hypothesis in a statistical test?
The statement we accept if the null hypothesis is rejected.
The statement that is always true.
The statement of no change or no relationship.
The statement we are trying to disprove.
Which data type is represented by the ranking of athletes in a competition (1st, 2nd, 3rd, etc.)?