An analyst wants to determine the distribution of courier services that are chosen by businesses operating online and off line. He identifies three of the most used courier services and selects 150 deliveries at random made by an online and an off line business that use these three courier services. Here are the data:

a) What is the null hypothesis?

b) What type of test is this?

c) What are the expected numbers for each cell if the null hypothesis is true?

d) Find the x2 statistic.

e) How many degrees of freedom does it have?

f) Find the critical value at a = 0.05.
g) What do you conclude?

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Courier Service PosLaju Skynet GDex Total Online Business 70 50 30 150 Offline Business 45 43 62 150 Total 115 93 92 300