The mean of the data set is 81.6.
The median of the data set is 80.
<h3>What is mean?</h3>
The mean is the average of a data set. Therefore,
Mean = (70 x 2 + 75 x 8 + 80 x 6 + 85 x 3 + 90 x 9) / 28 = 81.6.
Hence,
mean = 81.6
<h3>What is a median?</h3>
Median is a statistical measure that determines the middle value of a dataset listed in ascending order .
Therefore,
28 / 2 = 14
median = 80 + 80 / 2 = 160 / 2 = 80
learn more on mean and median here: brainly.com/question/28052298
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Answer:
In mathematics, opposite number or additive inverse of any number is a number n which, if added to n, results in 0 (the identity element of addition). The opposite number for n is written as −n. For example, −7 is the opposite number of 7
Step-by-step explanation:
:)
Answer:
3.5 m/hr
Step-by-step explanation:
2 + c = 5 -c c = speed of current
2 c = 3 c = current speed = 1.5 m/hr
your speed = 5 - 1.5 (or 2 + 1.5) = 3.5 m/hr
The empirical rule tells you 68% of normally-distributed observations are within 1 standard deviation of the mean.
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This is a number you may want to memorize, along with the numbers for 2 (95%) and 3 (99.7%) standard deviations.
