1A) The proportions of defective parts produced by two machines were compared, and the following data...

1A) The proportions of defective parts produced by two machines were compared, and the following data were collected. Determine a 90% confidence interval for p₁ - p₂. (Give your answers correct to three decimal places.)

Machine 1: n = 151; number of defective parts = 11

Machine 2: n = 153; number of defective parts = 8

Lower Limit -

Upper Limit -

1B) Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.)

Sample	Number	Mean	Std. Dev.
1	24	37.8	13.3
2	23	44	10.3

Expert Solution

1) A)

1) b)

t = -1.78

orchestra answered 1 year ago

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