The scatter plot represents the purchase prices and selling prices of X-ray machines made by five different manufacturers. Which of the following points show errors of prediction or residuals?Answer Choices :
Points (14, 25) and (15, 25)
Points (15, 25) and (18, 26)
Points (14, 25) and (16, 25)
Points (12, 24) and (18, 26)

Answers

Answer 1

Answer: The points on the scatter plot show the different predictions. The straight line drawn is called the line of regression. Errors in prediction for each point can be determined by drawing a vertical line from the point to the line of regression. As seen in the image, all of the prediction points are found on the line except for points (14,25) and (16,25). Therefore, these points contain errors in prediction.

Answer 2

Answer:

Answer:

As seen in the image, all of the prediction points are found on the line except for points (14,25) and (16,25). Therefore, these points contain errors in prediction.

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What is the advantage of using a bar graph over a pie chart?

Answers

Answer a bar chart can be used for a broader range of data types, not just for breaking down a whole into components.

Step-by-step explanation:

Final answer:

Bar graphs are advantageous over pie charts mainly because of their precision, scalability, and flexibility in data representation. They allow for clearer comparisons among different data categories, precise measurement of values, and flexibility in the choice of what is represented on the axes.

Explanation:

The advantage of using a bar graph over a pie chart revolves around the precision and scalability of data representation. In a bar graph, you can easily compare different data categories, make precise measurements of the values represented, and adjust the vertical axis to emphasize differences in quantities.

For instances with many small slices and one large one, a pie chart can create bias perceptions of the size distribution because the categorization of the slices can make some appear bigger than others. However, bar graphs can clearly represent data regardless of how many categories there are because each data point is displayed as an independent bar.

A bar graph is also more flexible in representing multiple data categories and longitudinal data since it can display both categorical and numerical values on its axes. For example, bars can represent countries or years, and the vertical axis can represent a numerical or a percentage value.

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The standard normal curve shown below models the population distribution of a random variable. What proportion of the values in the population does not lie between the two z-scores indicated on the diagram?z=-1.25
z=0.80