Cholesterol levels (mg/dL) were collected from a random sample of 20 patients two days after they had a heart attack.

Cholesterol level
280
318
294
288
266
360
236
160
224
142
270
226
186
282
276
206
242
310
272
288

For the data shown above, find the following.

Round answer in the first blank to 1 decimal place(s).

In the second blank put the correct units.

Find the mean:

Find the median:

Find the range:

Find the variance: (mg/dL)^2

Find the standard deviation: