Answer:
P(0≤T≤400)=0.3296
Step-by-step explanation:
we know probability density function is
probability that bulb will fail within first 400 hours
P(0≤T≤400)=
P(0≤T≤400)=
=
=
=1-0.67032 = 0.3296
so about 32.96 % bulb will fail within 400 hrs.
Answer:
the solutions are -8, -3
Step-by-step explanation:
We are given an equation z² + 11z + 24 = 0 and we have to find solutions for it, which means finding out the value of z.
We will do it by factorization method
We will factorize the equation such that the sum of two factor is equal to 11z and the product is 24z²
z² +8z + 3z + 24 = 0
z(z + 8) + 3(z + 8) = 0
taking z+8 common above
(z+3)(z+8) = 0
z+3 = 0, z = -3
z+8 = 0, z = -8
so the solutions are -8, -3
Part A: 5 out 25 lobsters have dangerous levels of mercury
Part B: the 95% confidence interval is given by (4.45, 5.65)
since everything is given all I had to do is find the critical value which can be found from the resource packet = 2.064
Using the formula we find 5.05+-2.064*1.45/5 = ( 4.45,5.65)
For this case, we have 95% of confidence that the true mean for the average number of lobsters with dangerous levels of mercury is between 4.45,5.65
Answer:
70
Step-by-step explanation:
I suppose its 70 because... 7 + 3 = 10
and 70 + 30 = 100...so the SUM is 100...yet minus 30 would be 70...so
70 is the bigger number...
please let me know if this was right...
hope I helped!
:)