Because elderly people may have aifficulty standing to have their height moasured, a study looked at the reiationahip betwoen overal height and height to the knoe. Hore are data (n centimetera) for five eiderly men: Knee Height x 56.8 46.7 40.6 43.6 52.9 Height y 191.1 154.4 144.4 162.5 172.7 For this data, itis krown that Ex = 240.6, Ey = 825.1. = 11754.86, E = 137441.47 and Exy = 40148.43. What is the equation of the least-squares regression line for predicting height from knee height? ANSWER: ŷ =O Compute the linear correlation coefficient of these data, correct to four decimal places. ANSWER: Predict the mean height of an elderiy man with a knee height of 58 centimetera. ANSWER: Assume known that s, = 7.47858. Find a 99% confidence interval for the mean height of an elderly man with a knee height of 58 centimeters.

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.