The mean and the median have both increased by 10 lbs. These modified boxplots d

Question

The mean and the median have both increased by 10 lbs.

These modified boxplots depict the proportion of foreign born residents of each state separated by region. What region has the smallest IQR?

West

7. After collecting weights from a sample of 30 athletes, it is discovered that the scale has underestimated weights by 10 lbs. Therefore, 10lbs. is added to all 30 weights. Which of the following is true? The median is unchanged, but the mean has increased by 10 lbs. The mean and the standard deviation have increased by 10 lbs. The standard deviation and IQR have both increased by 10 lbs.

The mean and the median have both increased by 10 lbs.

9.

These modified boxplots depict the proportion of foreign born residents of each state separated by region. What region has the smallest IQR?

Northeast South Midwest

West

11. Consider the normal curves N(100,15) and N(500,100). In which distribution will the proportion of individual values within two standard deviations of the mean be greater? N(100,15) N(500,100) Both will be approximately 68%. Both will be approximately 95%.

Explanation / Answer

7) option D) The mean and the median have both increased by 10 lbs. is correct

sd and IQR alway remain same when we shift data

9) Option C) Midwest is correct

IQR = Q3 -Q1

which is length of the rectangle

11)

option D) Both will be approximately 95% is correct

By empirical rule

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