The life expectancy of a person in 24 randomly selected countries for the year 2011 is...

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Statistics

The life expectancy of a person in 24 randomly selectedcountries for the year 2011 is in the table below.
a.) What is the range of the life expectancy rates? b.) What isthe median of the life expectancy rates?
77.2
55.4
69.9
76.4
75.0
78.2
73.0
70.8
82.6
68.9
81.0
54.2
5) Cholesterol levels were collected from patients two daysafter they had a heart attack and are shown in the table below.(Show all work. Just the answer, without supporting work, willreceive no credit.)
270
236
210
142
280
272
160
220
226
242
186
266
206
318
294
282
234
224
276
282
360
310
280
278
288
288
244
236
a.) What is the sample mean?
b.) What is the sample standard deviation? (Round your answer totwo decimal
places.
6) There are 4 black marbles and 6 red marbles in a box.Consider selecting one marble at a time from the box. What is theprobability that the first marble is black and the second marble isalso black. Express the probability in fraction format. (Show allwork. Just the answer, without supporting work, will receive nocredit.) a.) Assume the marble is selected with replacement. b.)Assume the marble is selected without replacement.

Answer & Explanation Solved by verified expert

4.3 Ratings (600 Votes)

4 Range Ordering the data from least to greatest we get 542554689699708730750764772782810826 The lowest value is 542 The highest value is 826 The range 826 542 284 The range of data set is 284 Median The median is the middle number in a sorted list of numbers So to find the median we need to See Answer

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270	236	210	142	280	272	160
220	226	242	186	266	206	318
294	282	234	224	276	282	360
310	280	278	288	288	244	236

270	236	210	142	280	272	160
220	226	242	186	266	206	318
294	282	234	224	276	282	360
310	280	278	288	288	244	236