Xây dựng khoảng ước lượng đối xứng cho tỷ lệ tổng thể, trình bày bài toán tìm cỡ mẫu tối thiểu trong ước lượng khoảng cho tỷ lệ tổng thể.

Eric drew a scale drawing of a country park. the scale he used was 1 inch = 2.5 yards. the picnic area is 80 yards wide in real life. how wide is the picnic area in the drawing ?

Ineed no it anyone can see this

The frequency table shows the results of a survey comparing the number of beach towels sold for full price and at a discount during each of the three summer months. the store owner converts the frequency table to a conditional relative frequency table by row. which value should he use for x? round to the nearest hundredth. 0.89 0.90 0.92 0.96