The entrance exam for business schools, the GMAT, given to 100 students had a mean of 520 and a standard deviation of 120. What was the standard error for the mean of this sample of students? Home Normal Probability Distribution The entrance exam for business schools, the GMAT, given to 100 students had a mean of 520 and a standard deviation of 120. What was the standard error for the mean of this sample of students? Answer : Given : The population mean (μ)=520 The population standard deviation (σ)=120 The sample size (n)=100 Solution : σx¯=σn =120100 =12 Related Tags# normal distribution# probability adbhutah adbhutah.com Articles: 1279 Previous Post A manufacturer of banana chips would like to know whether its bag filling machine works correctly at the 413 gram setting. It is believed that the machine is overfilling the bags. A 12 bag sample had a mean of 420 grams with a variance of 121. Assume the population is normally distributed. Is there sufficient evidence at the 0.05 level that the bags are overfilled? Next Post The mean height of women in a country (ages 20-29) is 64.5 inches. A random sample of 60 women in this age group is selected. What is the probability that the mean height for the sample is greater than 65 inches? Assume σ=2.91.
The average resting heart rate of a population is 90 beats per minute, with a standard deviation of 10.5 bpm. Find the z-scores that correspond to each of the following heart rates. Round your answers to the nearest hundredth, if necessary.
The average resting heart rate of a population is 90 beats per minute, with a standard deviation of 10.5 bpm. Find the z-scores that correspond to each of the following heart rates. Round your answers to the nearest hundredth, if necessary.
A random variable follows the normal probability distribution with a mean of 120 and a standard deviation of 23.
A random variable follows the normal probability distribution with a mean of 120 and a standard deviation of 23.