For a standard normal distribution, find:
P(z > -2.52) (round to 3 decimal places)
For a standard normal distribution, find:
P(-2.56 < z < -2.52) (round to 3 decimal
places)
For a standard normal distribution, find:
P(z > c) = 0.2726
Find c.
(round to 2 decimal places)
A manufacturer knows that their items have a normally
distributed lifespan, with a mean of 5.3 years, and standard
deviation of 1.7 years.
If you randomly purchase one item, what is the probability it will
last longer than 9 years? (Give answer to 4 decimal places.)
For a standard normal distribution, find: P(z > -2.52) (round to 3 decimal places) For a standard...
7. For a standard normal distribution, find: P(z < c) = 0.1164 Find c rounded to two decimal places. 8.For a standard normal distribution, find: P(z > c) = 0.89 Find c rounded to two decimal places 9.About ___% of the area under the curve of the standard normal distribution is between z=-0.426 and z=0.426 (or within 0.426 standard deviations of the mean). 10.About ___% of the area under the curve of the standard normal distribution is outside the interval...
A manufacturer knows that their items have a normally distributed length, with a mean of 18 inches, and standard deviation of 5.7 inches. If one item is chosen at random, what is the probability that it is less than 13 inches long? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.7 years, and standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than...
For a standard normal distribution, find: P(z > c) = 0.7211 (Round to two decimal places.) C=
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.1 years, and standard deviation of 1.1 years. If you randomly purchase one item, what is the probability it will last longer than 3 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 13 years, and standard deviation of 2.5 years. If you randomly purchase one item, what is the probability it will last longer than 20 years? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 5.8 years, and standard deviation of 1.9 years. The 5% of items with the shortest lifespan will last less than how many years?
1. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than -0.864°C. P(Z<−0.864)= 2. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find...
1) Find the area under the standard normal curve to the right of z= -0.62. Round your answer to four decimal places. 2) Find the following probability for the standard normal distribution. Round your answer to four decimal places. P( z < - 1.85) = 3) Obtain the following probability for the standard normal distribution. P(z<-5.43)= 4) Use a table, calculator, or computer to find the specified area under a standard normal curve. Round your answers to 4 decimal places....
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.3 years, and standard deviation of 0.6 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.9 years, and standard deviation of 0.8 years. If you randomly purchase one item, what is the probability it will last longer than 4 years?
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.5 years, and standard deviation of 1.8 years. If you randomly purchase one item, what is the probability it will last longer than 12 years?