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Thanks Bob, I will go through the theory again so I can have a good grasp of the concepts. Only then will I refer back and attempt these questions.
Thanks again,
Thanks, I will go through the theory.
1.1 P(A) = 408+678/2018 = 0.538
1.2 P(AlB) = 379/2018 / 1210/2018 = 0313
1.3 P(AUB) = P(A) + P(B) - P(AandB) = (678/2018)+(379/2018)-(379/2018) = 0336
1.4 P(A) *P(B) = (207/808) * (408/2018) = 0.0517 interpretation
I can't, I am investing time again to go through the theory. I just have a mental block and under so much pressure, I want to do well and but it's frustrating if you just can't absorb the content!
Thanks, Ganesh
Noted,
Kind regards
Hi Guys
Please help me with the below exercise:
A well-known business school in Cape Town conducted a survey in 2013 amongst its MBA applicants to determine whether students apply to only one business school. A sample of 2018 students was chosen and the following results were obtained: (rounded to 3 decimals)
Age Did you apply to more than one school?
Yes No Total
23 and under 207 201 408
24-26 299 379 678
27-30 185 268 453
31-35 66 193 259
36 and over 51 169 220
Total 808 1210 2018
1.1) What is the probability that a randomly selected applicant is younger than 27 [1]
1.2) What is the probability that a randomly selected applicant is 24-26 years old given that he/she did not apply to more than one school? [3]
1.3) What is the probability that a randomly selected applicant is 24-26 years old or did not apply to more than one school? [3]
1.4) Is the number of schools applied to independent of age? Let A = “Yes” and B = “23 and under”. [3]
Hi Guys
Question 2 [10 Marks]
The probability that a flight departs on time in 0.83 and the probability that it arrives on time is 0.92. The probability that the flight arrived on time given that it departed on time is 0.94 (rounded off to two decimals).
2.1) What is the probability that the flight did not arrive on time? [1]
2.2) What is the probability that the flight arrived and departed on time? [3]
2.3) What is the probability that the flight departed on time given that it has arrived on time? [3]
2.4) What is the probability that the flight either arrived or departed on time? [3]
Hi Guys
Please help em with this exercise:
Question 2 [10 Marks]
The probability that a flight departs on time in 0.83 and the probability that it arrives on time is 0.92. The probability that the flight arrived on time given that it departed on time is 0.94 (rounded off to two decimals).
2.1) What is the probability that the flight did not arrive on time? [1]
2.2) What is the probability that the flight arrived and departed on time? [3]
2.3) What is the probability that the flight departed on time given that it has arrived on time? [3]
2.4) What is the probability that the flight either arrived or departed on time? [3]
Hi Guys
Please help me with this exercise:
Question 3 [10 Marks]
Guess clothing stores recorded the buying behaviour of their customers over the last decade (2004 to 2014). They established that the probability that a customer will buy a pair of Guess jeans is about 0.7. A customer buys a Guess top 30% of the time given that a pair of Guess jeans was purchased, but only 15% of the time given that a pair of Guess jeans was not purchased.
3.1) Explain the concepts of:
3.1.1) Probability Addition Law (2)
3.1.2) Probability Multiplication Law (2)
3.2) Calculate the probability that a randomly selected person buys a pair of Guess jeans and a Guess top (rounded off to two decimals). (3)
3.3) Calculate the probability that a randomly selected person buys a Guess top but no pair of Guess jeans (rounded off to two decimals). (3)
Can someone please help me with these prac exercises, It's due today and I don't know where to get started.
A well-known business school in Cape Town conducted a survey in 2013 amongst its MBA applicants to determine whether students apply to only one business school. A sample of 2018 students was chosen and the following results were obtained: (rounded to 3 decimals)
Age Did you apply to more than one school?
Yes No Total
23 and under 207 201 408
24-26 299 379 678
27-30 185 268 453
31-35 66 193 259
36 and over 51 169 220
Total 808 1210 2018
1.1) What is the probability that a randomly selected applicant is younger than 27 [1]
1.2) What is the probability that a randomly selected applicant is 24-26 years old given that he/she did not apply to more than one school? [3]
1.3) What is the probability that a randomly selected applicant is 24-26 years old or did not apply to more than one school? [3]
1.4) Is the number of schools applied to independent of age? Let A = “Yes” and B = “23 and under”. [3]
Question 2 [10 Marks]
The probability that a flight departs on time in 0.83 and the probability that it arrives on time is 0.92. The probability that the flight arrived on time given that it departed on time is 0.94 (rounded off to two decimals).
2.1) What is the probability that the flight did not arrive on time? [1]
2.2) What is the probability that the flight arrived and departed on time? [3]
2.3) What is the probability that the flight departed on time given that it has arrived on time? [3]
2.4) What is the probability that the flight either arrived or departed on time? [3]
Question 3 [10 Marks]
Guess clothing stores recorded the buying behaviour of their customers over the last decade (2004 to 2014). They established that the probability that a customer will buy a pair of Guess jeans is about 0.7. A customer buys a Guess top 30% of the time given that a pair of Guess jeans was purchased, but only 15% of the time given that a pair of Guess jeans was not purchased.
3.1) Explain the concepts of:
3.1.1) Probability Addition Law (2)
3.1.2) Probability Multiplication Law (2)
3.2) Calculate the probability that a randomly selected person buys a pair of Guess jeans and a Guess top (rounded off to two decimals). (3)
3.3) Calculate the probability that a randomly selected person buys a Guess top but no pair of Guess jeans (rounded off to two decimals). (3)
Hi there Everyone
I'm from South Africa and doing a modules: Business Statistics.
For some reason I just don't get probability, maybe it's cause I have this mind block?!? But I want to master it!
Please help me with these exercises:
A well-known business school in Cape Town conducted a survey in 2013 amongst its MBA applicants to determine whether students apply to only one business school. A sample of 2018 students was chosen and the following results were obtained: (rounded to 3 decimals)
Age Did you apply to more than one school?
Yes No Total
23 and under 207 201 408
24-26 299 379 678
27-30 185 268 453
31-35 66 193 259
36 and over 51 169 220
Total 808 1210 2018
1.1) What is the probability that a randomly selected applicant is younger than 27 [1]
1.2) What is the probability that a randomly selected applicant is 24-26 years old given that he/she did not apply to more than one school? [3]
1.3) What is the probability that a randomly selected applicant is 24-26 years old or did not apply to more than one school? [3]
1.4) Is the number of schools applied to independent of age? Let A = “Yes” and B = “23 and under”. [3]
Question 2 [10 Marks]
The probability that a flight departs on time in 0.83 and the probability that it arrives on time is 0.92. The probability that the flight arrived on time given that it departed on time is 0.94 (rounded off to two decimals).
2.1) What is the probability that the flight did not arrive on time? [1]
2.2) What is the probability that the flight arrived and departed on time? [3]
2.3) What is the probability that the flight departed on time given that it has arrived on time? [3]
2.4) What is the probability that the flight either arrived or departed on time? [3]
Question 3 [10 Marks]
Guess clothing stores recorded the buying behaviour of their customers over the last decade (2004 to 2014). They established that the probability that a customer will buy a pair of Guess jeans is about 0.7. A customer buys a Guess top 30% of the time given that a pair of Guess jeans was purchased, but only 15% of the time given that a pair of Guess jeans was not purchased.
3.1) Explain the concepts of:
3.1.1) Probability Addition Law (2)
3.1.2) Probability Multiplication Law (2)
3.2) Calculate the probability that a randomly selected person buys a pair of Guess jeans and a Guess top (rounded off to two decimals). (3)
3.3) Calculate the probability that a randomly selected person buys a Guess top but no pair of Guess jeans (rounded off to two decimals). (3)
TOTAL MARKS = 30
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