a) The maintenance department has tested the batteries in one of its stores. The tested batteries were 1000 batteries of 338 V. Your supervisor gave you the results as shown in the group frequency table 1 below. 1. Use that data given to calculate the mean, and standard deviation of the data. 2. Explain the relevance of mean and standard deviation to someone who does not know what they are, without explaining the terms themselves. Make sure not to explain the terms mean and SD as terms, explain their relevance to the batteries. You may support your explanations with graphs. You may use a spreadsheet for these calculations, but you must provide clear evidence of the formulas used in each cell and submit the spreadsheet file with your report. Voltage values between (V) Class Frequency 320-324.9 15 325-329.9 45 330-334.9 135 335-339.9 410 340-344.9 320 345-349.9 75

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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.