87 K + 100 K = 187 K
The real answer is 2 K less than that. Estimate 185 K.
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2% of 87000 = 2% * 87000 = 0.02 * 87000 = 1740
Consider a distribution with an unknown parameter pi. If the true value of pi is not known but has been estimated, then the estimated value is usually denoted by pi-hat. This is to distinguish between a known parameter and an estimated one.
Estimation is a range of the subject spoken about. There is estimated to be over 90 different species of birds in California.
To the nearest thousand, 5000
To the nearest hundred, 500