Add. BS TALE (Quiz)

Which of the formula below is correct?

• 𝑷(𝑨 𝒐𝒓 𝑩) = 𝑷(𝑨) + 𝑷(𝑩)

  if the events are not mutually exclusive

• 𝑷(𝑨 𝒐𝒓 𝑩) = 𝑷(𝑨) + 𝑷(𝑩)

  if the events are mutually exclusive

• Combination

  𝒏𝑪𝒓 = 𝒏! (𝒏 − 𝒓)!

• Permutation

  𝒏𝑷𝒓 = 𝒏! 𝒓! (𝒏 − 𝒓)!

... is the possibilities of how many arrangements of r objects selected from n possible objects where the order is important.

• Mean

• Combination

• Permutation

• Mode

Good, average, poor is ... level of measurement.

• Nominal

• Ordinal

• Ratio

• Interval

... is a part of population.

Sampling is important because of the factors below, except ...

• Cost reduction

• Time effectiveness

• Avoid destructing the nature

• Time-consuming

Sampling method based on the division (subgroup) of characteristics

• Simple Random Sampling

• Stratified Random Sampling

• Systematic Random Sampling

• Cluster Sampling

If two independent events will occur, we use

• General rule of multiplication

  P (A) * P(B/A)

• Rule of Addition

  P(A) + P(B)

• P (A or B) = P(A) + (B) - P (A and B)

Formula of population standard deviation is ..

• 
• 
• 
• 

Types of probability that we've learnt

• Binomial Probability Distribution

• Discrete Probability Distribution

• Complex Probability Distribution

• Poisson Probability Distribution

In counting confidence interval, we usually use ...% with ... (z value) if the level of confidence is not stated in the question.

• 99%, 2.57

• 90%, 1.86

• 96%, 1.95

• 95%, 1.96