You’re working for a manufacturing plant where a machine was updated to reduce m
ID: 3066342 • Letter: Y
Question
You’re working for a manufacturing plant where a machine was updated to reduce maintenance times there were 8 samples taken on an old style machine and 12 samples from the modified machine. You want to determine if the average maintenance times are significantly different. The population variances are unknown but it is believed that they are unequal. What is the degree of freedom? Express your answer as a whole number. You’re working for a manufacturing plant where a machine was updated to reduce maintenance times there were 8 samples taken on an old style machine and 12 samples from the modified machine. You want to determine if the average maintenance times are significantly different. The population variances are unknown but it is believed that they are unequal. What is the degree of freedom? Express your answer as a whole number.Explanation / Answer
here as we know that vairance are unequal but there values are not given therefore from conservative method
degree of freedom =min(n1-1 ; n2-1) =mn(8-1 ; 12-1) =7
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