# Question

The area under the density curve that lies between 30 and 40 is 0.832. What percentage of all possible observations of the variable are either less than 30 or greater than 40?

## Answer to relevant Questions

In this section, we mentioned that the total area under any curve representing the distribution of a variable equals 1. Explain why. A variable is normally distributed with mean 6 and standard deviation 2. Find the percentage of all possible values of the variable that a. Lie between 1 and 7. b. Exceed 5. c. Are less than 4. A variable is normally distributed with mean 10 and standard deviation 3. a. Determine and interpret the quartiles of the variable. b. Obtain and interpret the seventh decile. c. Find the value that 35% of all possible ...A preliminary behavioral study of the Jingdong black gibbon, a primate endemic to the Wuliang Mountains in China, found that the mean song bout duration in the wet season is 12.59 minutes with a standard deviation of 5.31 ...Determine and sketch the area under the standard normal curve that lies a. To the left of −3.02 b. To the right of 0.61 c. Between 1.11 and 2.75 d. Between −2.06 and 5.02 e. Between −4.11 and −1.5. f. Either to ...Post your question

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