Use the data set {d1, d2, d3, ..., d251} consisting of 251 ...

[crobinson2013]

Question 1

Use the data set {0, -1, -3, 3, 3, -5, -7, 10} to answer the following question(s).

The median of the data set is
◦ -0.5.
◦ -3.5.
◦ 3.
◦ 0.
◦ none of these

Question 2

Use the data set {d₁, d₂, d₃, ..., d₂₅₁} consisting of 251 numbers to answer the following question(s).

After sorting the data set (in increasing order from left to right), the median is
◦ the number in the 126th position.
◦ the number in the 125th position.
◦ the sum of all the numbers divided by 251.
◦ the average of the numbers in the 125th and 126th positions.
◦ none of these

[karmakat49]

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Only 32% of students answer this correctly

[ETearle]

Use the data set {d₁, d₂, d₃, ..., d₂₅₅} consisting of 255 numbers to answer the following question(s).

After sorting the data set (in increasing order from left to right), the median is
◦ the sum of all the numbers divided by 255.
◦ the average of the numbers in the 127th and 128th positions.
◦ the number in the 127th position.
◦ the number in the 128th position.
◦ none of these

[Viet Thy]

the number in the 128th position.

[ARLKQ]

Use the data set {d₁, d₂, d₃, ..., d₂₅₆} consisting of 256 numbers to answer the following question(s).

After sorting the data set (in increasing order from left to right), the median is
◦ the sum of all the numbers divided by 255.
◦ the number in the 128th position.
◦ the number in the 129th position.
◦ the average of the numbers in the 128th and 129th positions.
◦ none of these

[nickk12214]

the average of the numbers in the 128th and 129th positions.

[CBme]

Question 1

Use the data set {0, -1, -3, 3, 3, -5, -7, 10} to answer the following question(s).

The 15th percentile of the data set is
◦ -4.
◦ -2.
◦ -5.
◦ -3.
◦ none of these.

Question 2

Use the data set {d₁, d₂, d₃, ..., d₂₅₁} consisting of 251 numbers to answer the following question(s).

After sorting the data set (in increasing order from left to right) the first quartile is
◦ the number in the 64th position.
◦ the average of the numbers in the 63rd and 64th positions.
◦ the number in the 63rd position.
◦ the average of the numbers in the 62nd and 63rd positions.
◦ none of these

[vboyd24]

Answer 1

-5.

Answer 2

the average of the numbers in the 63rd and 64th positions.

[big1devin]

Use the data set {d₁, d₂, d₃, ..., d₂₅₁} consisting of 251 numbers to answer the following question(s).

After sorting the data set (in increasing order from left to right), the third quartile is
◦ the sum of the median plus the first quartile.
◦ the average of the numbers in the 188th and 189th positions.
◦ the number in the 189th position.
◦ the number in the 188th position.
◦ none of these

[jxjsniuniu]

the average of the numbers in the 188th and 189th positions.