narwhalebearp5871i
09.10.2020 •
Mathematics
Sales ($ million) Convertible SUV Sedan Mini Truck Marginal Total Allison 45 28 19 36 128 B & B Motors 65 22 15 9 111 Pluto Cars 18 25 27 10 80 Panther Motors 40 26 34 12 112 Marginal Total 168 101 95 67 431 The table shows the annual sales revenue for different types of vehicles from four automobile manufacturers. The difference of the relative frequency of revenue earned by B & B Motors from sales of convertibles compared with the total revenue of all four companies and the relative frequency of revenue earned by B & B Motors from sales of mini trucks compared with the total revenue of all four companies is . Write your answer rounded to two decimal places.
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Ответ:
Option c
Step-by-step explanation:
--The large-sample confidence interval
formula for proportions is valid if np ≥ 15 and n(1-p) ≥ 15. The large sample confidence
interval only contain the true value a certain percentage of the time. A 95% CI will contain the
value 95% of the time. You add 2 successes and 2 failures.