1: Which measure of central tendency provides the most realistic summary of a typical house price in this dataset?
20s
mode
median
mean
weighted mean
2: A small branch recorded daily service transactions over 6 days as follows: 12,15,10,8,20,19. What is the sample mean daily transaction value?
60s
16.8
13.5
12
14
3: A quality inspector records the weights (in grams) of 8 packaged items: 142,135,150,128,145,138,152,140. What is the median weight of these items?
60s
141.24 grams
140 grams
141 grams
142 grams
4: A dataset contains n=19 ordered observations. According to the formula Q1=4n+1th value, at which ordered position is the first quartile (Q1) located?
40s
15th
10th
5th
4th
5: When computing the median of a grouped frequency distribution using the formula Median=l+(f2n−m)×c, what does the variable m represent?
20s
The total number of observations in dataset
The cumulative frequency of the cass preceding the median class
The lower boundary limit
The class size
6: A frequency distribution summarizes grouped data for n=92 total observations. To calculate the third quartile (Q3), what positional cumulative frequency value is used to identify the Q3 class?
60s
69
23
70
46
7: A box-and-whisker plot displays the distribution of a dataset graphically. Which set of five key summary measures forms the structural elements of this plot?