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babymother [125]
3 years ago
8

Joanna set a goal to drink more water daily. The number of ounces of water she drank each of the last seven days is shown below.

60, 58, 64, 64, 68, 50, 57. On the eighth day, she drinks 82 ounces of water.
Select all the true statements about the effect of the eighth day's amount on Joanna's daily amount distribution.

The average daily amount of water is the same with or without the inclusion of the eighth day's amount.

The median amount of water is the same with or without the inclusion of the eighth day's amount.

The interquartile range of the data decreases when the eighth day's amount is included in the data.

The interquartile range of the data increases when the eighth day's amount is included in the data.

The median amount of water is higher when the eighth day's amount is included in the data.
Mathematics
2 answers:
artcher [175]3 years ago
7 0

Answer:

The median amount of water is higher when the eighth day's amount is included in the data.

The interquartile range of the data increases when the eighth day's amount is included in the data.

Explanation:

IQR with 8th day: 8.5

Before 8th day= 7

Median with 8th day= 62

before 8th day=60

hammer [34]3 years ago
3 0

<u>Answer:</u>

The median amount of water is higher when the eighth day's amount is included in the data.

<u>Explanation:</u>

Given the ounces of water drank is 60, 58, 64, 64, 68, 50, 57

Arranging in ascending order: 50, 57, 58, 60, 64, 64, 68

Calculating the median of the above data

Median (when n is odd) = \left(\frac{n+1}{2}\right)^{t h} \text { term }

where n =7

Median = 4th term = 60

When the eight day is added,

Series will be: 50, 57, 58, 60, 64, 64, 68, 82

Median (when n is even) =       \frac{\left(\frac{n}{2}\right)^{t h} t e r m+\left(\frac{\pi}{2}+1\right)^{t h} t e r m}{2}

Median = \frac{60+64}{2}=62

So, here we can say that median has increased after adding 82 in the data

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Hello!

The objective of this experiment is to test if the salaries of elementary school teachers are equal in two districts. You can test this trough the population means of the salaries of the teachers if they are either equal or different or directly test if the difference between the salaries of the two districts is cero or not, symbolically: μ₁ - μ₂ = 0

Remember, in the null hypothesis is usually stated the known information, is the "no change" premise and always carries the = symbol.

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I hope it helps!

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