It is 0.839
100%
z = 1.52 (approx)
The area under a normal distribution is one since, by definition, the sum of any series of probabilities is one and, therefore, the integral (or area under the curve) of any probability distribution from negative infinity to infinity is one. However, if you take an interval of a normal distribution, its area can be anywhere between 0 and 1.
One.
Yes, and is equal to 1. This is true for normal distribution using any mean and variance.
50%
It is 0.877
UK area code 0161 is Manchester. A number beginning with 0161 759 could be anywhere in the greater Manchester 0161 area.
UK area code 0161 is Manchester. 0161 644 is an unused prefix.
0.0006 (approx).
01616 is not an area code itself, but 0161 is the area code for the Manchester area in the UK.All UK numbers beginning 0161 (including 0161 6......) are Manchester.
UK telephone area code 0161 is Manchester, but 0161 553 is an invalid number block.
100%
In the UK, area code 0161 is Manchester. 0161 279 is a "virtual prefix," meaning that the number could be located anywhere in the greater Manchester 0161 zone.
The total area under a normal distribution is not infinite. The total area under a normal distribution is a continuous value between any 2 given values. The function of a normal distribution is actually defined such that it must have a fixed value. For the "standard normal distribution" where μ=0 and σ=1, the area under the curve is equal to 1.
In the UK, area code 0161 is Manchester. A number beginning with 0161 682 is most likely a BT landline in the Fallsworth district of Manchester; however, with number portability, any particular 0161 number could be located anywhere in the greater Manchester 0161 zone, served by any local telephone company.
The total area of any probability distribution is 1