Priya Dogra – Certification | Jobs | Internships
Related Articles
Enroll Here: Introduction to Data Analytics with Python Free Certification
Sign up Here: Alison Free Online Courses
Question 1: If X and Y are independent events, then ______________. Choose two.
- the occurrence of X affects the occurrence of Y
- the occurrence of X does not affect the occurrence of Y
- the occurrence of Y affects the occurrence of X
- the occurrence of Y does not affect the occurrence of X
Question 2: Which of the following method of assigning probabilities is based on historical data? Choose one.
- Subjective probabilty
- Relative frequency probability
- Classical method
- Objective probablity
Question 3: True or False. A conditional probability is the probability of one event, given that another event has occurred.
- True
- False
Question 4: The most frequently occurring value in a data set is called the _________ of the data set. Fill in the blank.
Answer: Mode
Question 5: True or False. Stratified random sampling is a method of selecting a sample in which the population is divided into strata, and then random samples are drawn from each stratum
- True
- False
Question 6: True or False. Probability is the numerical likelihood that an event will occur.
- True
- False
Question 7: True or False. Coefficient of variation is the ratio of the standard deviation to the mean, generally expressed as a percentage.
- True
- False
Question 8: Which of the following is a type of sampling distribution? Choose one.
- Sample distribution of sample standard deviation
- Sample distribution of sample median
- Sample distribution of sample mode
- Sample distribution of sample proportion
Question 9: Consider the following data function in Python programming:
def x(data)
Z = max(data) – min(data)
return Z
What will the defined data function above calculate? Choose one.
- Median
- Mode
- Range
- Variance
Question 10: Median is not applicable to __________ data type. Fill in the blank.
Answer: Nominal
Question 11: True or False. There are three methods of assigning probabilities.
- True
- False
Question 12: True or False. An independent event is always mutually exclusive.
- True
- False
Question 13: True or False. If two groups of numbers have the same mean, then their medians must also be equal.
- True
- False
Question 14: True or False. Pie charts are used for the visualization of categorical data.
- True
- False
Question 15: True or False. A mutually exclusive event will always be an independent event.
- True
- False
Question 16: In skewed data, the best measure of central tendency is the __________. Fill in the blank.
Answer: Median
Question 17: If P = 0.4 and n = 200, what is P(0.40 ≤ p ≤ 0.45)? Choose one.
- 0.354
- O.4251
- 0.4
- 0.532
Question 18: True or False. Stratified random sampling is a method of selecting a sample in which various strata are selected from the sample.
- True
- False
Question 19: True or False. It is not impossible to find the median of an odd-numbered data set.
- True
- False
Question 20: True or False. Frequency polygons and bar charts are used for continuous data.
- True
- False
Question 21: The 50th percentile of a normally distributed data set will represent its __________. Choose two.
- Sum
- Range
- Mode
- Mean
- Median
Question 22: True or False. In skewed data, the best measure of central tendency is the Mean.
- True
- False
Question 23: ______________ probabily comes from a person’s intuition or reasoning. Fill in the blank.
Answer: Subjective
Question 24: Which Python command is used for accessing the second row of an excel file named “data file” having only two rows? Choose one.
- datafile.tail()
- datafile.loc[0]
- datafile.loc[2]
- datafile.iloc[2]
Question 25: The Median is applicable for which of the following data types? Choose three.
- Cardinal
- Interval
- Nominal
- Ordinal
- Ratio
Question 26: True or False. To get the 3rd, 4th and 5th row of a datafile “df” in Python, the programmer can write: df.loc[2,3,4]
- True
- False
Question 27: If the true proportion of customers below 20 years is given by P = 0.35, what is the probability that a sample size of 100 yields a sample proportion between 0.3 and 0.4? Choose one.
- 0.53
- 0.706
- 0.961
- 0.827
Question 28: Some CDs produced by a manufacturer are defective. From the production line, 5 CDs are selected and inspected. How many sample points exist in this experiment? Choose one.
- 32
- 30
- 10
- 25
Question 29: Percentiles are measures of central tendency that divide a group of data into ________ parts. Answer in numeric form.
Answer: 100
Question 30: An icecream cafe has 200 customers every day. 60% of them like vanilla flavour while 80% of them like mango flavour. If a customer is selected at random, what is the probability that they like either mango or vanilla flavour? Choose one.
- 0.1
- 0.9
- 0.08
- 0.82
