Question
The statement "results are accurate within +/-4 p.p.,
95% of the time" refers respectively to:Solution
A confidence interval is a range of values that is likely to contain an unknown population parameter. If you draw a random sample many times, a certain percentage of the confidence intervals will contain the population mean. This percentage is the confidence level. In the above statement, 95% represents the confidence level which means that it can be said with 95% certainty that the confidence interval (here +/- 4pp) calculated contains the true population mean.
If '+' means '-', ' X ' means '+', '-' means '÷' and '÷' means ' X ', then what is the value of the following expression?
480 - 12 + 250 X 3...
If ‘$’ means ‘÷’, ‘#’ means ‘×’, ‘@’ means ‘-’ and ‘%’ means ‘+’, then the value of 65 @ 21 $ 3 # 5 % 7
...Select the correct combination of mathematical signs that can sequentially replace ‘*’ sign and balance the equation given below.
66 * 32 * 8...
Select the correct combination of mathematical signs that can sequentially replace the ‘*’ signs and balance the given equation.
12 * 8 * 42 ...
Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.
32 * 366 * 6 * 2 * 134 = 20
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36 A 6 B 6 D 6 ...
If '+' means '-', 'X' means '+', '-' means '÷', and '÷' means 'X', then what is the value of the following expression? 120 - 10 + 60 X 5 ÷ 3 X 15
...By interchanging the given two numbers (not digits), which of the following equations will be correct?
24 and 9
I. 113 + 24 – 20 × 9 ÷...
If ‘P’ means (×), ‘Q’ means (÷), ‘R’ means (-), and ‘S’ means (+), then what is the value of the expression:
54 Q 6 S 14 P 14 R...
If ‘$’ means ‘÷’, ‘#’ means ‘-’, ‘!’ means ‘×’ and ‘^’ means ‘+’, then the value of 84 ! 5 # 6 ^ 21 $ 7 is
...
