Mike asked in Science & MathematicsMathematics · 4 weeks ago

# Statistics HW Help (Prefferably llafer :) )?

1. Which is true?

In a right-skewed distribution, the mean is smaller than the median.

a right-skewed distribution and a normal distribution are similar in the following property: 50% of the values are above the mean and 50% below the mean.

In a right-skewed distribution the area under the curve to the left of the mean is greater than the area under the curve to the right of the mean

The median of a Gaussian distribution may be greater, equal, or smaller than the mean. It depends on mu and sigma of the distribution.

2. We have a dataset of ages of 100 kids born in some neighborhood. We calculate its mean and standard deviation, we denote them by m1 and s1, respectively.

3 years later, all of those kids are still alive and included in the dataset. Using the new values for their age, we calculate the mean and standard deviation of the ages, denoted by m1 and s2. Which is true?

m2=m1+3, s2=s1

m2=m1, s2=s1+3

m2=m1+3, s2=sqrt (s12 + 9)

m2=m1, s2=s1

m2=m1+3, s2=s1+9

m2=m1+3, s2=s1+3

it cannot contain datapoints with negative values

every value equals the mean

every datapoint has value zero

the probability distribution of this dataset is exactly symmetric, but we don't have enough information to say anything about the shape of the distirubtion