# smp_2023Q2_week04_quiz

## Quiz by smp

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8 questions
• Q1

Data dashboards are a part of ....

Simulation

Descriptive analytics

Optimization

Predictive analytics

Prescriptive analytics

60s
• Q2

Which of the below is not a measure of variability?

mode

range

whisker

standard deviation

coefficient of variation

60s
• Q3

Which of the below is not a good example of skewness?

Individual income in USA

Height of age 50-60 females in Ankara

Car prices in Bursa's district Nilüfer

Support for liberalism among people in Turkey

Education levels of Müslüm Gürses's fans

60s
• Q4

If a distribution is exactly normal, the mean is equal to

i. median

ii. max

iii. mode

iv. variation

i, ii

i, iii

ii, iv

iii, iv

i, iv

60s
• Q5

X is a variable with following values and pmf respectively; (2,3,4) , (0.3, 0.4, 0.3)

Compute the mean and variance

3, 1.2

2.8, 1.2

3, 0.1

3, 0.2

2.8, 0.6

120s
• Q6

We have a 5-sided dice.

- These side values are {2,4,8,16,16}

- The sides have realization probability inversely proportional to their faces values {1/2, 1/4 ... 1/16}

What is the expected value of a throw?

4.5

4

3.5

5

3

300s
• Q7

Toss a coin 2 times.

- Let A = "at least 1 heads"

- Let B = "first toss is tails"

When B realized, the probability of A => P(A|B)?

When A realized, the probability of B => P(B|A)?

1/4, 1/3

1/3, 1/4

1/2, 1/3

1/2, 1/2

1/2, 1/4

120s
• Q8

X is a random variable.

- The values of X are {2,4,5,6,7}

- The cdf (cumulative probability} of it are {0.25, 0.40, 0.75, 0.80, 1.00}

What are P(X<=5) and P(X=7) ?

0.25, 0.40

0.75, 0.05

0.25, 0.25

0.75, 0.20

0.40, 0.80

60s

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