Is 0.9 correlation good? The magnitude of the correlation coefficient indicates the strength of the association. For example, a correlation of r = 0.9 suggests a strong, positive association between two variables, whereas a correlation of r = -0.2 suggest a weak, negative association. What does a correlation of 0.7 mean? CORRELATION COEFFICIENT BASICS The […]
When was the universe 380000 years old?
When was the universe 380000 years old? The scientists studied an image of the oldest light in the universe to confirm its age of 13.8 billion years. This light, the “afterglow” of the Big Bang, is known as the cosmic microwave background and marks a time 380,000 years after the universe’s birth when protons and […]
What are the importance of energy in the society?
What are the importance of energy in the society? The use of energy is important to human society for handling problems in the environment. Developed societies use energy resources for agriculture, transportation, garbage collection, information technology and human communication. The use of energy has increased since the Industrial Revolution. What percentage of the economy is […]
What does tone mean when speaking?
What does tone mean when speaking? The definition of “tone of voice,” according to Merriam-Webster, is actually “the way a person is speaking to someone.” In essence, it’s how you sound when you say words out loud. How do you fix tone issues in writing? Let’s look at a few of the easiest and most […]
Why is there more weight at the poles?
Why is there more weight at the poles? The equator is moving quickly as the earth’s spins, so it has a lot of centrifugal force. The centrifugal force at the poles is zero. Your total weight at sea level at the equator (gravity minus centrifugal force) is therefore 9.764 m/s2 times your mass, whereas your […]
How reliable is memory as a source of knowledge?
How reliable is memory as a source of knowledge? Memory as a way of knowing is not our primary source of acquiring knowledge and neither is it disreputably reliable. This is seen through cases built up on eyewitness testimony, which can be found in the real-life example section of memory. What are the three theories […]
Why is pure copper not used for coins?
What is the relationship between luminosity and period of variability?
What is the relationship between luminosity and period of variability? In astronomy, a period-luminosity relation is a relationship linking the luminosity of pulsating variable stars with their pulsation period. The best-known relation is the direct proportionality law holding for Classical Cepheid variables, sometimes called Leavitt’s law. What is the period-luminosity relationship used for? All Cepheids […]
What triggers an HMRC investigation?
What triggers an HMRC investigation? The most common trigger for an investigation is submitting incorrect figures on a tax return – so it’s worth asking an accountant to offer professional advice about your accounts and check over your tax returns before you send them. Other triggers include: frequently filing tax returns late. Does HMRC know […]
How do fossils help us?
How do fossils help us? By studying the fossil record we can tell how long life has existed on Earth, and how different plants and animals are related to each other. Often we can work out how and where they lived, and use this information to find out about ancient environments. Fossils can tell us […]