Statistics and Probability
Quiz by Queeny Joyce Sebastian
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- Q1
Given a set of data{11, 12, 13, 14}. How many different samples of size n = 2 can be drawn without replacement from the population?
5
4
3
6
30s - Q2
When a sample is drawn from a given population, which statement is TRUE about the means?
The sample mean may be equal to, greater than, or less than the population mean.
The sample mean is greater than the population mean.
The sample mean is equal to the population mean.
The sample mean is less than the population mean.
30s - Q3
How do the sample size and the mean of the sampling distribution relate to the normal distribution?
As the sample size decreases, the sampling distribution of the means approaches a normal distribution.
As the sample size increases, the sampling distribution of the means approaches a normal distribution.
As the sample size decreases, the sampling distribution of the means does not affect the normal distribution
As the sample size increases, the sampling distribution of the means does not approach a normal distribution.
30s - Q4
What kind of parameter is applied in the situation, “The average age of 15 senior high school students is 17 years.”?
Variance
Standard Deviation
Mean
Proportion
30s - Q5
Noah noticed that the points on a scatter plot follow a trend rising from left to right. He also noticed that the points are plotted closely around the trend line. What is the correlation of the variables involved?
Weak positive
Strong negative
Weak negative
Strong positive
30s - Q6
The following are properties of normal distribution, EXCEPT one. Which one is it?
The normal distribution curve is bell-shaped.
The area under the normal curve is 1.
The tails of the normal curve touch the x-axis.
The mean of the standard normal curve is 0.
30s - Q7
How does the t-distribution differ from the normal distribution?
The t-distribution has a higher peak.
The t-distribution has a thicker tail.
The t-distribution is centered at 0.
The t-distribution is symmetric in the middle.
30s - Q8
Which of the following illustrates a Type II error?
Fail to reject a true null hypothesis.
Reject a false null hypothesis.
Fail to reject a false null hypothesis.
Reject a true null hypothesis.
30s - Q9
T-test is used when the sample size is _____________________.
less than 30 and the population standard deviation is not given.
greater than 30 and the population standard deviation is not given.
less than 30 and the population standard deviation is given.
greater than 30 and the population standard deviation is given.
30s - Q1030s
- Q11
Considering a test of difference of two samples, which test statistic could be used for a sample size of 100?
z-test
Pearson’s r
t-test
ANOVA
30s - Q12
Jeny and Camille are preparing relief goods to be served at an evacuation center. The more relief goods they prepare, the more people they will be able to serve. Which could be the dependent variable in this situation?
Number of relief goods prepared
Number of people they will be able to serve
Composition of the relief goods
Capacity of the evacuation center
45s - Q13
In tossing a coin, which is NOT a possible value of the random variable for the number of heads?
2
1
0
3
30s - Q14
Given the mean (µ) of 50 and the standard deviation (σ) of 4 of a population, what is the z-value that corresponds to a score (X) of 58?
1
4
2
3
120s - Q15
What is the 95th percentile of the normal curve?
z = 1.645
z = 1.64
z = 1.60
z = 1.65
120s