A glazier buys his glass from four different manufacturers - Clearglass (10%), Strongpane (25%), Mirrorglass (30%) and Reflection (35%). In the past, the glazier has found that 1% of Clearglass' product is cracked, 1.5% of Strongpane's product is cracked, and 2% of Mirrorglass' and Reflection's products are cracked. The glazier removes the protective covering from a sheet of glass without looking at the manufacturer's name - in other words, it's a random choice. He finds the glass is cracked. What is the probability it was made by Mirrorglass?

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Q: A glazier buys his glass from four different manufacturers - Clearglass (10%), Strongpane (25%),…

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A:

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A: Step 3 of 4 :   Compute the value of the test statistic=11.032

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A: Solution

Q: finds the glass is cracked. What is the probability it was made by Mirrorglass?

A:

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A: Formula : Test statistic

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.