Price deregulation in the airline industry has promoted competition and a variety of fare structures. Prior to deciding on a price change, a particular airline is interested in obtaining an estimate of the proportion of the market that it presently captures for a certain region. A random sample of 300 passengers indicatesthat 80 used that airline.

a. Find a point estimate ofthe proportion ofthe market that usesthis particular airline.
b. Find a 95% confidence interval for the proportion that uses this airline. (c) Can the airline conclude that its market share is more than 25%

a) 0.2667

b) (0.2167,0.3167)

c) We cannot conclude that its market share is more than 25%.

Step-by-step explanation:

We are given the following in the question:

Sample size, n = 300

Number of passengers who used airlines, x = 80

a) point estimate of the proportion of the market that uses this particular airline.

b) 95% confidence interval

Putting the values, we get:

c) First, we design the null and the alternate hypothesis  

Formula:

Putting the values, we get,

Now, we calculate the p-value from the table.

P-value = 0.252

Since the p-value is greater than the significance level, we fail to reject the null hypothesis and accept it.

Thus, we cannot conclude that its market share is more than 25%.

one that is bigger than 3 1/2

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.