Express the confidence interval
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Answer:
Let <em>x</em><em> </em>be that number.
The quotient is the result of dividing a number by another. In this case, the numbers are - 8 and x + 3.
The probability that exactly five if then are base metal failures is 0.1028
Given that,
The weld metal itself accounts for 85% of all weld failures in a given assembly, with the base metal accounting for the remaining 15%. Weld failures from 20 samples are analyzed.
X : number of base metal failures.
X ~ bin (n,p)
where, n = 20, p =0.15, q = 0.85
the pmf be:-
P(X=x)=
a)The probability that exactly five if then are base metal failures be:-
P(X=5)=
b)The probability that fewer than three of them are base metal failures be:-
=P(X<3)
=P(X=0)+P(X=1)+P(X=2)
c)The mean number of base metal failures be:-
=np=(20*0.15)=
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