A melting point test of n = 10 samples of a binder used in manufacturing a...
A melting point test of n = 10 samples of a binder used in manufacturing a rocket propellant resulted in a sample mean of 154.4 °F. Assume that the melting point is normally distributed with σ = 1.5°F. Is it possible to conclude at 1% significance that the melting point is not 155°F? What is the value of zcalc ? Please report your answer in 3 decimal places.
b: What is the p-value for p(z<-1.3)? Please report your answer in 3 decimal places.
Homework Answers
a)
Zcal = 
- 
/
/ sqrt(n)
= 154.4 - 155 / (1.5 / sqrt(10) )
= -1.265
b)
p-value = P ( Z < z)
= P( Z < -1.3)
= 1 - P( Z < 1.3)
= 1 - 0.9032
= 0.097
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A melting point test of n = 10 samples of a binder used in
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