An analyst wants to compare the 5G service provided by Zain and STC. A sample of five customers using both Zain and STC were asked how much score (out of 100) they give to 5G service of both telecom services. The response is given in the following table: Customer # 1 2 3 4 5 Zain 77 76 81 77 80 STC 68 72 72 60 73 For testing the hypothesis that the average customer satisfaction of Zain users is higher as compared to STC by at least 15 point, what is the value of T-test statistic?
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Mean of Zain: $\frac{76 + 81 + 77 + 80}{4} = \frac{314}{4} = 78.5$ Mean of STC: $\frac{68 + 72 + 72 + 60 + 73}{5} = \frac{345}{5} = 69$ Show more…
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