MatC606_W6(SY25-26_Term2)

Multiple Choice

A network administrator monitors ping spikes over 6 hours: 45ms, 52ms, 45ms, 60ms, 48ms, and 50ms. Which measure of central tendency would identify the most recurring latency value?

• Mean

• Median

• Mode

• Average

Fill in the Blanks

Calculate the mean number of bug reports received over 4 days if the counts are: 8, 12, 5, and 15.

NOTE: Write one number per box only.

Multiple Choice

What is the median for the following app ratings: 1, 3, 3, 4, 5, 5?

• 3

• 3.5

• 4

• 4.5

Multiple Choice

What is the mode of the following sequence: 10, 20, 30, 40, 50?

• 10

• 30

• 50

• No Mode.

Multiple Choice

A class has boundaries of 50.5 to 60.5. What is the midpoint ($x$)?

• 55

• 55.5

• 45

• 45.5

Multiple Choice

If $n=100$ in a grouped dataset, and the cumulative frequency for Class A is 45 and Class B is 65, which class is the Median Class?

• Class A

• Class B

• Neither

• Both

Multiple Choice

A histogram has bars of varying heights. If the heights represent frequency, what does a flat histogram (all bars the same height) suggest?

• There is no Mode.

• There is no Mean.

• The Median is Zero

• The data are all zeros.

Multiple Choice

Which column in a Frequency Distribution Table is specifically required to calculate the Mean of grouped data?

• Class Midpoint (x)

• Lower Boundaries (l)

• Total number of data

• Commulative Frequency (cf)

Multiple Choice

When computing the Median for grouped data, what does the 'Cumulative Frequency' column help you locate?

• The total sum of all values

• The class that contains the middle (n/2) data point

• The average value of the set.

• The class with the most frequent item.

Multiple Choice

A developer tracks the file sizes of 6 different assets in KB: 120, 150, 180, 210, 300, 950. Why might the median be a better 'center' than the mean for this set?

• The median always represents the highest frequency.

• The mean is too difficult to calculate for large numbers.

• The median suites data with even numbers.

• The median suites this dataset that has 950.