The number of new disease cases in a county for the last six days of May in 2020 are recorded as follows. Find the mean number of cases for these days.


​26-May
​27-May
​28-May
​29-May
​30-May
​31-May
358
342
368
403
494
446

1 answer

To find the mean number of cases for the last six days of May 2020, you need to sum the number of cases reported each day and then divide by the number of days.

Here are the number of cases for each day:
- 26-May: 358
- 27-May: 342
- 28-May: 368
- 29-May: 403
- 30-May: 494
- 31-May: 446

First, add these numbers together:
\[ 358 + 342 + 368 + 403 + 494 + 446 \]

Calculating the sum:
\[ 358 + 342 = 700 \]
\[ 700 + 368 = 1068 \]
\[ 1068 + 403 = 1471 \]
\[ 1471 + 494 = 1965 \]
\[ 1965 + 446 = 2411 \]

So, the total number of cases over the six days is 2411.

Next, divide this sum by the number of days (which is 6):
\[ \text{Mean} = \frac{2411}{6} \approx 401.83 \]

Therefore, the mean number of cases for these days is approximately 401.83 cases.