CÂU HỎI 11 (SINGLECHOICE)
Suppose a sample of n = 15 items is drawn from a population of manufactured products and the weight, X, of each item is recorded. Prior experience has shown that
the weight has a probability distribution with mean = 6 ounces and standard deviation = 2.5 ounces. Which of the following is true about the sampling distribution of the
sample mean if a sample of size 15 is selected?
All of the others are correct.
The standard deviation of the sampling distribution is 2.5 ounces.
The shape of the sample distribution is approximately normal.
The mean of the sampling distribution is 6 ounces.
CÂU HỎI 12 (SINGLECHOICE)
Consider the following sample data: 1, 2, 3, 4, 5, 5, 7, 8, 9, and 10. Find quartiles for the data.
=
10Q1-3;Q2-5: Q-9
10Q1-2.25; Q2-5; Q31-8.75
10=2Q₂ = 5; Q₁ = 1
102₁ = 2.5; Q₂ = 5; Q3 = 8.5
FUO 2.75;Q= 5; Q31 = 8.25
