The strength of concrete depends to some extend to some on the method used for drying. Two different methods were used, and the strengths of the concrete resulting from the two methods were measured. The data are given in the table below. Method 1 56 105 62 89 73 95 62 59 68 83 64 77 Method 2 111 66 58 49 82 94 93 78 56 85 Test at the 1% level of significance whether the mean strength of method 2 is less than method 1.
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.
The strength of concrete depends to some extend to some on the method used for drying. Two different methods were used, and the strengths of the concrete resulting from the two methods were measured. The data are given in the table below.
Method 1
56 105 62 89 73 95 62 59 68 83 64 77
Method 2
111 66 58 49 82 94 93 78 56 85
Test at the 1% level of significance whether the mean strength of method 2 is less than method 1.
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