Normal body temperatures is 98deg F. Standard detion is 1. For 95% of persons lower limit of body temperature ?
**Core Concept**
Normal body temperature is a critical parameter that varies slightly among individuals. The normal range for body temperature is typically considered to be between 97.7°F and 99.5°F (36.5°C and 37.5°C). This range is influenced by various factors, including age, sex, and time of day.
**Why the Correct Answer is Right**
To determine the lower limit of body temperature for 95% of persons, we need to calculate the standard deviation (SD) from the mean (normal body temperature). The lower limit can be calculated as mean - 1.96 x SD. In this case, the mean is 98°F and the standard deviation is 1. Using this formula, we get: 98°F - 1.96 x 1°F = 95.08°F. This is the lower limit of body temperature for 95% of persons.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not take into account the standard deviation of body temperature. Without considering the SD, we cannot accurately determine the lower limit of body temperature for 95% of persons.
**Option B:** This option is incorrect because it suggests a lower limit of body temperature that is too low. The actual lower limit of body temperature for 95% of persons is approximately 95.08°F, not 90°F.
**Clinical Pearl / High-Yield Fact**
When assessing body temperature, it's essential to consider the individual's normal range, which can vary depending on factors such as age and sex. A temperature below the lower limit of normal (approximately 95.08°F) may indicate hypothermia, while a temperature above the upper limit of normal (approximately 99.5°F) may indicate hyperthermia.
**Correct Answer: C. 95.08°F**