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Listening Quiz: Giải Thích Độ Không Chắc Chắn Của Dự Báo Bằng Dải Sai Số – Medium Level
Th6 24, 2024
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Nhà khoa học dữ liệu (English for Data Scientist)
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1.
What is the main purpose of Linda’s explanation?
To describe how to calculate sales for next year
To explain what the forecast chart and its error bands mean
To show that the forecast is guaranteed to be correct
To compare sales predictions from different companies
Explanation:
Linda says she wants to explain the forecast chart, and the conversation focuses on the sales predictions and the meaning of the error bands.
2.
What do the error bands show in the forecast chart?
The uncertainty in the forecast
The total number of past sales reports
The best month for future sales
The exact sales amount for next year
Explanation:
Linda explains that the shaded areas are error bands and that they show uncertainty.
3.
According to Linda, what does it mean when the bands are wider?
There is more possible variation
The sales prediction is exact
The chart is easier to read
The forecast is based on newer data
Explanation:
Linda says wider bands mean more possible variation.
4.
What can Robert most likely conclude after Linda’s explanation?
The forecast should be treated with caution
The shaded areas are unrelated to uncertainty
The error bands make the forecast exact
The forecast will not be useful at all
Explanation:
Linda says the forecast might not be exact and that they should be careful and expect some changes, so caution is reasonable.
5.
Where do the error bands come from?
Random guesses from the sales team
Past data and statistical models
The shaded areas on other charts
Customer surveys and interviews
Explanation:
Linda directly says the error bands come from past data and statistical models.
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