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Chapter 3: Q 49. (page 204)

Actual weight Refer to Exercise 47. Use the equation of the least-squares regression line and the residual plot to estimate the actual mean weight of the infants when they were 1 month old.

Short Answer

Expert verified

The shape of the image is approximately normally distributed.

Step by step solution

01

Given information

The figure is

02

Concept

The least-squares regression line reduces the sum of squares of vertical distances between the observed points and the line to zero.

03

Explanation

In a survey, 400 respondents were asked to affix a blue sticker next to the oldest person they have ever known on a large wall.

The sample size is huge, therefore (more than 30). As a result, the image's shape is roughly and normally distributed.

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