im a mean person

The scores on a certain standardized test are known to have a mean of 100 and standard deviation 25. A person will get a merit certificate if he scores above 125. What is the probability that a person taking this test receives a merit certificate? => 0.1587 or 0.6587 o..

The number of miles per hour driven by a sales person on 14 different days is listed here. What is the point estimate for the mean? Find the 95% confidence interval of the mean for the average miles per hour. => 32.3 and 29.5 < μ < 35.1 or 31.5 and 31 < &mu..

Endocrine Glands - Meaning and Types - A wide variety of physiological processes are carried out unconsciously by the endocrine system through chemical messengers called "hormones." The endocrine system is a collection of glands that produces these hormones, which are necessary for normal..

The number of personal computers sold in 10 selected show rooms of System Software Park for a particular period is 121, 326, 254, 900, 460, 1160, 85, 74, 158 and 69. Find the mean deviation. => 2875.8 or 287.58 or 356.3 or 0..

The average intake of added sugars by a person is observed to be 68 gm/day for 10 days with a sample standard deviation of 2.86 grams. Find the 99% confidence interval of the true mean. => 65.1 < μ < 70.9 or 64 < μ < 01 or 67 < μ < 69 or 65 < μ &..

The mean distance travelled by a person in 48 hours is 21.8 km per hour and by his friend in 50 hours is 20 km per hour. If the standard deviations were 4 and 5.2, then check if both the people differ in their mean velocities at 90% and 95% of confidence. => do not dif..

The data corresponding to the cholesterol levels of eight persons before and after taking a mineral is shown. Find the test value. What can you say about their means at 95% confidence? Before (X 1 ) 220 230 190 185 208 212 210 234 After (X 2 ) 215 232 188 182 210 208 206 236 => ..

This arises from the mode of observation of the person, taking the reading. e.g., Parallax error. These errors can be minimised by obtaining several readings and taking their arithmetic mean..

These are diseases caused by the entry and development of living organisms such as virus, bacteria, protozoans, worms or fungi into the body. The organism causing the disease may be transmitted from one person to another by means of air, water, food, physical contact and insects..

By using an appropriate device, we can know the measure of a physical quantity.The accuracy of the reading depends on the device and the person taking the measurement. Therefore, accuracy means the extent upto which a measured value agrees with the standard or true value. For ex..