Does anyone know how to crack this code?
1 answer:
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Answer:
d) No, this would not be unusual because 46% is only 1.2 standard errors from 40%.
Step-by-step explanation:
Problems of normally distributed samples are 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.
If the z-score is higher than 2 or lower than -2, X is unusual.
In this question:
Mean = 40%. So
Standard error = 5%. So
Is 46% unusual?
We have to find Z when X = 0.46. So
1.2 is lower than 2, that is, it is only 1.2 standard deviations from the mean. So 46% is not unusual.
So the correct answer is:
d) No, this would not be unusual because 46% is only 1.2 standard errors from 40%.
Answer: No, it is not sufficient to serve 65 vehicles as it can only serve 62 vehicles with this space
Step-by-step explanation:
Since we have given that
Dimensions of space where vehicles are stored is
145 feet by 130 feet
Number of vehicles to serve = 65
Area required for each vehicle = 300 ft²
So, we need to find that is it sufficient for to serve 65 vehicles.
So, first we find the number of vehicles can be served in this space
No, it is not sufficient to serve 65 vehicles as it can only serve 62 vehicles with this space.