Answer:
100
Step-by-step explanation:
Answer:
A) 68.33%
B) (234, 298)
Step-by-step explanation:
We have that the mean is 266 days (m) and the standard deviation is 16 days (sd), so we are asked:
A. P (250 x < 282)
P ((x1 - m) / sd < x < (x2 - m) / sd)
P ((250 - 266) / 16 < x < (282 - 266) / 16)
P (- 1 < z < 1)
P (z < 1) - P (-1 < z)
If we look in the normal distribution table we have to:
P (-1 < z) = 0.1587
P (z < 1) = 0.8413
replacing
0.8413 - 0.1587 = 0.6833
The percentage of pregnancies last between 250 and 282 days is 68.33%
B. We apply the experimental formula of 68-95-99.7
For middle 95% it is:
(m - 2 * sd, m + 2 * sd)
Thus,
m - 2 * sd <x <m + 2 * sd
we replace
266 - 2 * 16 <x <266 + 2 * 16
234 <x <298
That is, the interval would be (234, 298)
Answer:
-10
Step-by-step explanation:
a - b = 7 - (-3) = 7 + 3 = 10
--> | a - b | = 10
--> - | a - b | = -10
Answer:
See explanation
Step-by-step explanation:
To subtract mentally 81 from 304, complete following steps:
<u>Step 1:</u> Write number 304 as
<u>Step 2: </u>Write number 81 as
<u>Step 3: </u>Now subtract 80 and 1 from number 304:
Answer:
Take a picture of the graph too
Step-by-step explanation: