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fara26
06.11.2019 •
Mathematics
Determine the following areas under the standard normal (z) curve: (round your answers to four decimal places.) (a) to the left of −1.29 (b) to the right of 1.29 (c) between −1 and 1 (d) to the left of 0 (e) to the right of −6 (f) between −1.7 and 2.5 (g) to the left of 0.23
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Ответ:
a) 0.985
b) 0.0985
c) 0.6826
d) 0,5
e) 1
f) 0.9492
g) 0.5910
Step-by-step explanation:
a) Directly from z table: The area to the left of -1.29 is 0.985
b) To the right of 1.29 We get from z table the value of 0.9015 this value is the area from the point 1.29 up to the left tail, so we have to subtract 1 - 0.9015 and get 0.0985 (the area from the point 1.29 to the left)
c) Are between -1 and 1 . We find in z table values for 1 ( 0.8413 ) and for -1 ( 0.1587) ( this last area is already included in the area of the point 1 so again we must subtract
0.8413 - 0.1587 = 0.6826
d) To the left of 0 the aea is 0,5
e) To the right of -6 is of course 1
f) Between -1.7 and 2.5 . we find from z table the values
-1.7 ⇒ 0.0446 (this area is included in the area of the point 2.5) and for 2.5 ⇒ 0.9938
Then area between -1.7 and 2.5 is : 0.9492
g) Area to the left of 0.23 is directly fom z table : 0.5910
Ответ:
The best measure of center for this data set is the median and its value expressed up to one decimal place is 37.50
Step-by-step explanation:
The best measure of center for this data set is the MEDIAN , and its value expressed up to one decimal place is 37.50.
We have given the data set gives the number of bottles filled by each of the workers in a bottling plant in one day.
The data set is:
{36, 18, 16, 28, 68, 35, 37, 66, 38, 40, 41, 44, 72, 29}
Let us find the median of this data set.
Arrange the values in ascending order:
{16,18,28,29,35,36,37,38,40,41,44,66,68,72}
Median = average of middle entries
Median = 37.5
Therefore the best measure of center for this data set is the median and its value expressed up to one decimal place is 37.50