# “almost All (99.7%) Horse Pregnancies Fall In What Range Of Lengths” Worksheet Answers?

## Between what values do the lengths of the middle 95% of all horse pregnancies fall?

The middle 95% of all pregnancies last between 266-2*16 and 266+2*16 days, 234 to 298 (for future reference, note that this “rule” is Page 3 rounded somewhat compared to the charts). The middle 99.7% of all pregnancies last between 266-3*16 and 266+3*16 days, 218 to 314.

## How long are the longest 2.5 percent of all pregnancies?

The longest 2.5% of all pregnancies will fall above 2 standard deviations from the mean. 266 + 2 H16L = 298 So the longest 2.5% of all pregnancies last 298 or more days. What percentage of human pregnancies last less than 270 days?

## What percent of horse pregnancies are longer than 342 days?

(a) Using the 68-95 rule for the normal density curve representing horse pregnancies, we know that 95% of all horse pregnancies will lie within 2 SDs about the mean. So for the particular question at hand we can say that 95% of horse pregnancies will lie between 336 ± 2 × 3 or 330 to 342 days.

You might be interested:  Quick Answer: Kentucky Derby What Horse Was Blocked By Maximum Security?

## What percent of horse pregnancies are longer than 339 days?

(a) 99.7% of horse pregnancies fall within three standard deviations of the mean: 336 ± 3(3), or 327 to 325 days. (b) About 16% are longer than 339 days since 339 days or more corresponds to at least one standard deviation above the mean.

## How long do the longest 20% of pregnancies last?

(c) How long do the longest 20% of pregnancies last? The longest 20% of pregnancies last at least 280 days.

## How short are the shortest 2.5 of all pregnancies?

(b) The shortest 2.5% of pregnancies are shorter than 234 days (more than two standard deviations below the mean).

## Between what two values will the duration of 95% of all human pregnancies fall?

So, 95% of all pregnancies will last between 234 and 298 days.

## What range of lengths covers almost all 99.7 %) of this distribution?

Answer: The lengths from 32.1cm to 46.5cm covers 99.7% of this distribution.

## How do you find the Z score?

The formula for calculating a z-score is is z = (x-μ)/σ, where x is the raw score, μ is the population mean, and σ is the population standard deviation. As the formula shows, the z-score is simply the raw score minus the population mean, divided by the population standard deviation.