4. The specification of the melting point of an alloy is 1200 degrees Celsius. If the melting point differs from this by more than 20 degrees, the composition of the alloy will have to be changed. Assume the melting point is normally distributed with standard deviation 35 degrees. A sample of 25 alloys were obtained and the average melting point were 1224 degrees. By using a = 0.01, determine whether the composition of the alloy will have to be changed? UTM UTM BU

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4. The specification of the melting point of an alloy is 1200 degrees Celsius. If the melting point
differs from this by more than 20 degrees, the composition of the alloy will have to be
changed. Assume the melting point is normally distributed with standard deviation 35
degrees. A sample of 25 alloys were obtained and the average melting point were 1224
degrees. By using a = 0.01, determine whether the composition of the alloy will have to be
changed?
UTM
UTM
Transcribed Image Text:4. The specification of the melting point of an alloy is 1200 degrees Celsius. If the melting point differs from this by more than 20 degrees, the composition of the alloy will have to be changed. Assume the melting point is normally distributed with standard deviation 35 degrees. A sample of 25 alloys were obtained and the average melting point were 1224 degrees. By using a = 0.01, determine whether the composition of the alloy will have to be changed? UTM UTM
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