Draw two rectangles one on top of the other, split one into three and the other into 6. Shade 2 of the sections in the one split in three and 4 of the one split in 6.
Answer:
The standard deviation of the age of the customers was of 2.08 years.
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean and standard deviation , the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question:
85% of the customers are between the ages of 21 and 27 years.
Since the normal distribution is symmetric, this means, for example, that 27 is the 50 + (85/2) = 92.5th percentile, that is, when , Z has a pvalue of 0.925. So when . We use this to find
The standard deviation of the age of the customers was of 2.08 years.
Answer:
A. 6(1+2x)
Step-by-step explanation:
we take 6 as Common factor out of the equation
Answer:
-12
Step-by-step explanation:
4 1/2 - 5 1/8 = -0.625
7.5 x -0.625 = -12
Answer:
Step-by-step explanation:
far away