Question

A group of freshmen wanted to determine if the number of hours spent in front of the computer is associated with the number of hours of sleep. They observed 7 people over the span of 4 months and noted down their average computer screen time and the hours they slept during the study duration. The results are on the right. Determine if computer screen time is associated with the number of hours of sleep. Give the null hypothesis and the alternative hypothesis and identify what statistical test to use and why?​

Answer 1

Answer:

Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

Answer 2

Answer:

${\sf{\bold{\mathbb{\underline{Global \; Warming }}}}}$

In fact, the greenhouse effect is quite important for life on earth. Without this effect, the sun’s radiation would be reflected back into the atmosphere, freezing the surface and making life impossible. However, when greenhouse gasses in excess amounts get trapped, serious repercussions begin to appear. The polar ice caps begin to melt, leading to the rise in sea levels. Furthermore, the greenhouse effect is accelerated when polar ice caps and sea ice melts. This is due to the fact the ice reflects 50% to 70% of the sun’s rays back into space; but without ice, the solar radiation gets absorbed. Seawater reflects only 6% of the sun’s radiation back into space.