A software company is interested in improving customer satisfaction rate from the 66% currently claimed. The company sponsored a survey of 208 customers and found 148 customers were satisfied. What is the test statistic z?

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Q: additionally how would you find the: test statistic & p-value

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A: Given, n=119, x=31, α=0.05 Then, p^=31119=0.260504

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A: Formula for Test statistic  Test statistic ( z ) z = ( p^ - p ) / ( √( p * ( 1 - p) / n) )

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Q: Please explain how you got the 9.36 z-score test statistic?

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Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: Find the percentile rank of a test score of 76 for the data set 70,73,68,83,78,80,89,88,65   FULL…

A: Given data is70,73,68,83,78,80,89,88,65

Q: Describe the formula used to calculate a z-score?

A: The formula used to calculate z-score is