BASIC STATISTICS [STA1510] EXAM PACK
2024 LATEST WITH RATIONALES
GUARANTEED A+
s
1. What is the mean of the following data set? 4, 8, 6, 5, 3
o A) 4
o B) 5
o C) 5.2
o D) 6
o Answer: C) 5.2
Rationale: Mean = (4 + 8 + 6 + 5 + 3) / 5 = 26 / 5 = 5.2.
2. Which measure of central tendency is...
BASIC STATISTICS [STA1510] EXAM PACK
2024 LATEST WITH RATIONALES
GUARANTEED A+
s
1. What is the mean of the following data set? 4, 8, 6, 5, 3
o A) 4
o B) 5
o C) 5.2
o D) 6
o Answer: C) 5.2
Rationale: Mean = (4 + 8 + 6 + 5 + 3) / 5 = = 5.2.
2. Which measure of central tendency is most affected by outliers?
o A) Mean
o B) Median
o C) Mode
o D) Range
o Answer: A) Mean
Rationale: The mean can be significantly skewed by extreme values, while the
median is resistant to outliers.
3. If a data set has a variance of 16, what is the standard deviation?
o A) 4
o B) 8
o C) 2
o D) 16
o Answer: A) 4
Rationale: Standard deviation is the square root of the variance, so √16 = 4.
4. What does a p-value of 0.05 indicate in hypothesis testing?
o A) There is a 5% chance the null hypothesis is true.
o B) There is a 5% probability of making a Type I error.
o C) The results are statistically significant.
o D) All of the above.
o Answer: D) All of the above.
Rationale: A p-value of 0.05 indicates a 5% chance of observing the data if the
null hypothesis is true, and results are considered statistically significant if this
threshold is met.
5. Which of the following is a measure of variability?
o A) Mean
o B) Median
, 2|Page
o C) Mode
o D) Standard Deviation
o Answer: D) Standard Deviation
Rationale: Standard deviation measures the spread of data points around the
mean.
6. What is the purpose of a confidence interval?
o A) To determine the mean of a population
o B) To estimate the range in which a population parameter lies
o C) To conduct hypothesis testing
o D) To summarize data
o Answer: B) To estimate the range in which a population parameter lies
Rationale: Confidence intervals provide a range of values that likely contain the
true population parameter.
7. In a normal distribution, what percentage of data falls within one standard
deviation of the mean?
o A) 50%
o B) 68%
o C) 95%
o D) 99.7%
o Answer: B) 68%
Rationale: Approximately 68% of the data in a normal distribution falls within
one standard deviation of the mean.
8. If the median of a data set is 10, what does this indicate?
o A) The average of all data points is 10.
o B) Half of the data points are below 10.
o C) All data points are equal to 10.
o D) The range of the data set is 10.
o Answer: B) Half of the data points are below 10.
Rationale: The median is the middle value, meaning half of the observations are
less than this value.
9. Which of the following distributions is symmetric?
o A) Normal distribution
o B) Skewed left distribution
o C) Skewed right distribution
o D) Uniform distribution
o Answer: A) Normal distribution
Rationale: The normal distribution is bell-shaped and symmetric about the mean.
10. What is the primary purpose of descriptive statistics?
o A) To make inferences about a population
o B) To summarize and describe data
o C) To test hypotheses
o D) To predict future trends
o Answer: B) To summarize and describe data
Rationale: Descriptive statistics provide simple summaries about the sample and
measures.
11. In a box plot, what does the line inside the box represent?
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller laurenjames. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.99. You're not tied to anything after your purchase.
