The manager went over the sales of mobile phones at the store and found that the mean sale was 45, with a standard deviation of
1 answer:
The z-score of the sale of mobile phones on that day is 1.75
Step-by-step explanation:
The formula of z-score is z = (x - μ)/σ, where:
- x is the score
- μ is the mean
- σ is the standard deviation
∵ The mean sale was 45
∴ μ = 45
∵ The standard deviation was 4
∴ σ = 4
∵ 52 mobile phones were sold on a particular day
∴ x = 52
To find z-score of the sale of mobile phones on that day substitute the values of x, μ, and σ in the formula of z-score
∵
∴
∴ z = 1.75
The z-score of the sale of mobile phones on that day is 1.75
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If the mean of the data set is 32.6. Then the number of pages he read in 5 days is 163.
<h3>What is Mean?</h3>Mean is simply defined as the average of the given set of numbers. The mean is considered as one of the measures of central tendencies in statistics. The mean is said to be an arithmetic mean. It is the ratio of the sum of the observation to the total number of observations.
Han recorded the number of pages that he read each day for five days.
If the mean of the data set is 32.6 pages. Then the total number of the pages he read till now, will be
Let the total number of the pages be x. Then we have
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Answer:
The closet equivalent of the ratio of 'a' to 'c' is:
Step-by-step explanation:
Given
- a is 63% of x
i.e.
a=0.63x
- c is 3/8 of x.
i.e.
c=3/8x
Hence,
Thus, the closet equivalent of the ratio of 'a' to 'c' is: