With "infinite" numbers of successive random samples, the mean of the sampling distribution is equal to the population mean .As the sample sizes increase, the variability of each sampling distribution decreases so that they become increasingly more leptokurtic.
Answer:
13
Step-by-step explanation:
25d - 12 = ?
1 day = 25(1) - 12 = 13
12 + 13 = 25
Answer: The probability is 0.4
Step-by-step explanation:
Since the time taken to assemble a car in a certain plant is a random variable having a normal distribution, we would apply the formula for normal distribution which is expressed as
z = (x - µ)/σ
Where
x = time taken to assemble cars
µ = mean time
σ = standard deviation
From the information given,
µ = 20 hours
σ = 2 hours
We want to find the probability that a car can be assembled at this plant in a period of time less than 19.5 hours. It is expressed as
P(x < 19.5) = 1 - P(x ≤ 19.5)
For x = 19.5
z = (19.5 - 20)/2 = - 0.25
Looking at the normal distribution table, the probability corresponding to the z score is 0.4
Answer:
the correct answer is b
Step-by-step explanation:
Answer:
7.24 * 10^-5
Step-by-step explanation: