Efficiency experts study the process used to manufacture items in order to make them as efficient as possible. One of the steps used to manufacture a metal clamp involves the drilling of three holes. In a sample of 100 clamps, the mean time to complete this step was 48.4 seconds. Assume that the population standard deviation is 9 seconds. Round the critical value to no less than three decimal places. Find the sample size needed so that a 95% confidence interval will have margin of error of 1.5.
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.
Efficiency experts study the process used to manufacture items in order to make them as efficient as possible. One of the steps used to manufacture a metal clamp involves the drilling of three holes. In a sample of 100 clamps, the mean time to complete this step was 48.4 seconds. Assume that the population standard deviation is 9 seconds. Round the critical value to no less than three decimal places. Find the
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