According to Chance magazine,+ Suppose a certain magazine claims the mean healthy adult temperature is around 98.3 Fahrenheit, not the previously assumed value of 98.6. Suppose the standard deviation is 0.6 degree and the population of healthy temperatures is bell-shaped. USE SALT (a) What proportion of the population (as a decimal) have temperatures at or below the presumed norm of 98.6? (You may need to use Table 8.1 or SALT. Round your answer to two decimal places.) (b) Would it be accurate to say that the normal healthy adult temperature is 98.3 Fahrenheit? Explain. O Yes. The normal adult temperature is likely 98.3, since there is such a large proportion of temperature below 98.6. Yes. Since there is a small standard deviation, it is likely the normal adult temperature is 98.3. O No, the average temperature is 98.6. 98.3 is a sample average. O No, that's the average. Normal temperatures cover a wider range. Need Help? Read It Watch It