Answer:
Step-by-step explanation:
Given: The mean of the temperatures in the chart is 24° and standard deviation is 4°.
To find: How many years had temperatures within one standard deviation of the mean
Solution: Mean temperature μ = 24 , standard deviation σ =4
The lower and upper bound for temperature within one standard deviation of the mean is given as:
Lower bound = μ - σ = 24 - 4=20
Thus, the Lower bound is = 20
Upper bound = μ + σ = 24+ 4=28
Thus, the Upper bound is = 28
Now, The temperature value between (Lower bound, Upper bound) that is (20, 28) is said to be within one standard deviation of the mean.
Hence 27° is the temperature value that is within one standard deviation of mean.
