Answer:
a) The probability of obtaining a sample mean that is less than or equal to 1770 hours is P(M≤1770)=0.0013.
b) It is unusual, as there are only 13 chances in 10,000 (0.13%) of having this outcome.
Step-by-step explanation:
We have a population lifetime with mean of 1800 hours and standard deviation of 100 hours.
Samples of size n=100 are taken and tested.
We can calculate the probability of obtaining a sample mean that is less than or equal to 1770 hours using a z-score for the sample Mean M=1770 and then calculating its probability according to the standard normal distribution:
4y-2(32y-5) First you distribute which you will end up with 4y-64y+10 then do 4 subtract 64 = -60y now you end up with -60y+10
half an hour past 7, will be 7 plus 30 minutes then 7:30.
we could also come from the other way, and say is 30 minutes before 8 o'clock.
Answer:
a) 10 salads
b) 5 Choose 2 and 5 Choose 3 result in the same amount
Step-by-step explanation:
a) ₅C₂ = 5! / (5-2)! 2!
= 5! / 3! 2!
= (5 × 4) / 2
= 10 salads
b) ₅C₃ = 5! / (5-3)! 3!
= 5! / 2! 3!
= (5 × 4) / 2
= 10
Answer:
least—> greater ( 1/2 , √0.28 , 0.58 )
Step-by-step explanation:
o 1/2 = 0.5
o √0.28 = 0.52
o 0.58 = 0.58
I hope I helped you^_^