Question 1 (1 point) Let X be the sample mean, and s be the sample standard deviation. According to the “empirical rul
Posted: Sun Jul 10, 2022 10:10 am
Question 1 (1point)
Let X be the sample mean, and s be the samplestandard deviation. According to the “empirical rule”, what percentof the sample data lies in the following intervals:
(a) between X-s and X+s
(b) between X-2s and X+2s
(c) between X-3s and X+3s
Question 1 options:
Question 2 (1point)
Under what conditions is the empirical rule is true(approximately)? Help: The empirical rule determines thatapproximately what fraction of the data set is within 1,2 or 3standard deviations from the sample mean.
Question 2 options:
a. The empirical rule applies to every data set.
b. The empirical rule applies to data sets with histograms thatare skewed to the right.
c. The empirical rule applies to data sets with histograms thatare skewed to the left.
d. The empirical rule applies to data sets with histograms thatare approximately mound-shaped and symmetric.
Question 3 (1point)
Indicate (without computation) which sample in each set has thehigher standard deviation.
Set 1
Set 2
Set 3
Set 4
Question 3 options:
Set 1: BSet 2: BSet 3: ASet 4: B
Set 1: BSet 2: ASet 3: BSet 4: A
Set 1: ASet 2: BSet 3: ASet 4: A
Set 1: BSet 2: BSet 3: ASet 4: A
Question 4 (1point)
You ordered 20 computer chips from a manufacturer. We know that5% of the chips coming out of the production line are defective.Let X be the number of defective chips among the 20 that youwill receive.
What is the distribution of X?
Question 4 options:
a. A continuous distribution
b. Binomial distribution
c. Normal distribution
d. Hypergeometric distribution
Question 5 (1point)
You ordered 20 computer chips from a manufacturer. We know that5% of the chips coming out of the production line are defective.Let X be the number of defective chips among the 20 that youwill receive.
What is the mean and standard deviation of X?
Question 5 options:
a. Mean: 1Standard Deviation: 0.97
b. Mean: 1.5Standard Deviation: 0.75
c. Mean: 1Standard Deviation: 0.85
d. Mean: 1.5Standard Deviation: 0.97
Let X be the sample mean, and s be the samplestandard deviation. According to the “empirical rule”, what percentof the sample data lies in the following intervals:
(a) between X-s and X+s
(b) between X-2s and X+2s
(c) between X-3s and X+3s
Question 1 options:
Question 2 (1point)
Under what conditions is the empirical rule is true(approximately)? Help: The empirical rule determines thatapproximately what fraction of the data set is within 1,2 or 3standard deviations from the sample mean.
Question 2 options:
a. The empirical rule applies to every data set.
b. The empirical rule applies to data sets with histograms thatare skewed to the right.
c. The empirical rule applies to data sets with histograms thatare skewed to the left.
d. The empirical rule applies to data sets with histograms thatare approximately mound-shaped and symmetric.
Question 3 (1point)
Indicate (without computation) which sample in each set has thehigher standard deviation.
Set 1
Set 2
Set 3
Set 4
Question 3 options:
Set 1: BSet 2: BSet 3: ASet 4: B
Set 1: BSet 2: ASet 3: BSet 4: A
Set 1: ASet 2: BSet 3: ASet 4: A
Set 1: BSet 2: BSet 3: ASet 4: A
Question 4 (1point)
You ordered 20 computer chips from a manufacturer. We know that5% of the chips coming out of the production line are defective.Let X be the number of defective chips among the 20 that youwill receive.
What is the distribution of X?
Question 4 options:
a. A continuous distribution
b. Binomial distribution
c. Normal distribution
d. Hypergeometric distribution
Question 5 (1point)
You ordered 20 computer chips from a manufacturer. We know that5% of the chips coming out of the production line are defective.Let X be the number of defective chips among the 20 that youwill receive.
What is the mean and standard deviation of X?
Question 5 options:
a. Mean: 1Standard Deviation: 0.97
b. Mean: 1.5Standard Deviation: 0.75
c. Mean: 1Standard Deviation: 0.85
d. Mean: 1.5Standard Deviation: 0.97