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Over a 15 day period (Days 1-15), each of the 60 employees of a firm received a certain vaccination. The graph shows the total number of employees that had received the vaccination by the end of each of these days.
Based on the information provided, select from each drop-down menu the option that creates the most accurate statement.
| Text Component | Literal Content | Simple Interpretation |
|---|---|---|
| Time period | Over a 15 day period (Days 1–15) | The data covers 15 consecutive days of activity |
| Population | 60 employees of a firm | There are 60 employees total in the group studied |
| Event | Each received a certain vaccination | Each employee was vaccinated once during the period |
| Graph focus | Shows the total number of employees that had received the vaccination by the end of each of these days | The data is presented as a running, cumulative total rather than per-day figures |
| Chart Component | Displayed Information | Interpretation |
|---|---|---|
| Chart type | Line chart of cumulative vaccinations | Shows running total of vaccinations over time |
| X-axis | Days 0–15 (units = day) | Timeline matches text period; starts at 0 |
| Y-axis | Number of vaccinated employees (0–60) | Max value aligns with population total |
| Data points | Starts at 0, ends at 60 | All employees vaccinated by day 15 |
| Slope patterns | Some days have steep increases, some are flat | Daily vaccinations varied: some days had many, others few or zero |
| Flat lines | No change (e.g. days 8–9) | No vaccinations done on that day |
Vaccinations were not evenly distributed over the 15 days: on some days (such as days 5, 6, 11, and 15), 7 or more employees received the vaccine, while on at least one day (day 9), no vaccinations occurred. The average daily vaccinations is 4, but actual daily counts ranged from 0 to 8. All 60 employees received their vaccinations by day 15, as reflected in the cumulative total reaching the population maximum.
For this 15-day period, the average (arithmetic mean) number of employees receiving the vaccination per day was [BLANK].
On exactly [BLANK] days of this period, 7 or more employees received this vaccination.
Both blanks require careful interpretation of the information given by the cumulative vaccination chart. Blank 1 is solved by averaging the total over the days. Blank 2 is solved by calculating daily increments and counting those that are 7 or more. Both answers are 4.
The two blanks are independent. The answer to the first is simply based on total vaccinations and days. The second requires detailed daily analysis but does not depend on the first calculation.