Activity Data Type
Activity Data Type
Activity Data Type
Q2) Identify the Data types, which were among the following
Nominal, Ordinal, Interval, Ratio.
Data Data Type
Gender Nominal
High School Class Ranking Ordinal
Celsius Temperature Interval
Weight Ordinal
Hair Color Nominal
Socioeconomic Status Ordinal
Fahrenheit Temperature Interval
Height Ordinal
Type of living accommodation Nominal
Level of Agreement Ordinal
IQ(Intelligence Scale) Interval
Sales Figures Ratio
Blood Group Nominal
Time Of Day Ordinal
Time on a Clock with Hands Interval
Number of Children Ratio
Religious Preference Nominal
Barometer Pressure Interval
SAT Scores Interval
Years of Education Ordinal
Q3) Three Coins are tossed, find the probability that two heads and one tail are
obtained? Ans: 3/8
Q4) Two Dice are rolled, find the probability that sum is
a) Equal to 1-Ans: 0
b) Less than or equal to 4 Ans: 1/6
c) Sum is divisible by 2 and 3 Ans: 1/6
Q5) A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at
random. What is the probability that none of the balls drawn is blue?
Ans: 10/21
Ans: 3.09
Q7) Calculate Mean, Median, Mode, Variance, Standard Deviation, Range &
comment about the values / draw inferences, for the given dataset
- For Points,Score,Weigh>
Find Mean, Median, Mode, Variance, Standard Deviation, and Range
and also Comment about the values/ Draw some inferences.
Q8) Calculate Expected Value for the problem below
a) The weights (X) of patients at a clinic (in pounds), are
108, 110, 123, 134, 135, 145, 167, 187, 199
Assume one of the patients is chosen at random. What is the Expected
Value of the Weight of that patient?
Ans:
The Expected Value is:
108 + 110 + 123 + 134 + 135 + 145 + 167 + 187 + 199 = 145.333
Q9) Calculate Skewness, Kurtosis & draw inferences on the following data
Cars speed and distance
SP and Weight(WT)
Q10) Draw inferences about the following boxplot & histogram
Q11) Suppose we want to estimate the average weight of an adult male in
Mexico. We draw a random sample of 2,000 men from a population of
3,000,000 men and weigh them. We find that the average person in our
sample weighs 200 pounds, and the standard deviation of the sample is 30
pounds. Calculate 94%,98%,96% confidence interval ?
Q12) Below are the scores obtained by a student in tests
34,36,36,38,38,39,39,40,40,41,41,41,41,42,42,45,49,56
1) Find mean, median, variance, standard deviation.
2) What can we say about the student marks?
Ans for 1) Mean : 40.44
Median: 40.5
Variance: 12.69
Standard Deviation: 3.56
Q13) What is the nature of skewness when mean, median of data are equal?
Ans: Skewness = 0
Q14) What is the nature of skewness when mean > median ?
Ans: Skewed to right or positive skewness
Q15) What is the nature of skewness when median > mean?
Ans: Skewed to left of negative skewness
Q16) What does positive kurtosis value indicates for a data ?
Ans: Relatively Peaked distribution
Q17) What does negative kurtosis value indicates for a data?
Ans: Relatively Flat distribution
Q18) Answer the below questions using the below boxplot visualization.
Draw an Inference from the distribution of data for Boxplot 1 with respect
Boxplot 2.
Q 20) Calculate probability from the given dataset for the below cases
Hint:
rcode pt(tscore,df)
df degrees of freedom