BSNS112 Interpreting Business Data Assignment 2 Questions 2026 | Otago

Interpreting Business Data (BSNS112) Assignment 2 

Graph 1: Binomial and Normal Distributions

Question 1

An IT helpdesk operator stated that 30% of students have experienced problems with the student desktop. You plan to ask thirty randomly chosen BSNS112 students if they have had issues with the desktop. 

1.Justify, in the context of the question, that this problem can be modelled using the binomial distribution by showing whether or not the four necessary binomial conditions hold.

2.What is the probability that 10 or fewer of the 30 students have had problems?

3. What is the probability that between 5 and 10 (both inclusive) of the 30 have had problems?

The number of coffees sold by the Coffee Truck seems to be normally distributed with a mean of 100 and a standard deviation of 25. (A continuity correction is not required to answer this question) 

1.What is the probability that there are more than 125 sales?