Not everyone pays the same price for the same model of a car. The figure illustrates a normal distribution for the 99.7% -95% 68%→ prices paid for a particular model of a new car. The mean is $22,000 and the standard deviation is $2000. Use the 68-95-99.7 Rule to find what percentage of buyers paid between $16,000 and $28,000. 16 18 20 22 24 26 Price of a Model of a New Car (Thousands) The percentage of buyers who paid between $16,000 and $28,000 is %. Number of Car Buyers
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.
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68-95-99.7 Rule :
According to 68-95-99.7 Rule ,
68% of data falls within the first standard deviation from the mean
In mathematical notation, this is represented as: μ ± 1σ
95% fall within two standard deviations
In mathematical notation, this is represented as: μ ± 2σ
99.7% fall within three standard deviations.
In mathematical notation, this is represented as: μ ± 3σ
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