Answer:
Hope this helps!
Please see through the steps below
Answer: The answer is B
Step-by-step explanation:
Answer: probability for the orange marble is 23/78 ; green= 20/78; red=20/78
Step-by-step explanation:there are 23 orangebmarbles out of all marbles which is 78 marbles and it doesn't help same for red and green marbles they both are 20 out of 78 marbles which is the total . So that is the probability of all the total marbles
Answer:
a. no, there are no sufficient data to use
b. assumption b is right
Step-by-step explanation:
a. for the standard deviation to be calculated at 99% confidence, the data needed should be the mean (given), the variate value to be calculated for(not given), the standard deviation(not given), the z value of the normal distribution ( not given),
since there are too many unknown, the data given are not sufficient to calculate.
b. validity of this interval requires that coating layer thickness be at least approximately normally distributed.
