17. A variable distributes normally in the population, with a mean of u=1000 and a standard deviation of g=120, a. What is the percentile rank of the score x=1180? b. Which scores form the limits of the middle 80% of the distribution? c. What is the probability of randomly selecting a score between 940 and 1120? d. When randomly selecting a sample the size of n-100 from the population above, what is the probability of getting a sample mean higher than M-1015? e. When randomly selecting a sample the size of n=36 from the population above, what is the probability of getting a sample mean higher than M-1015? f Explain the difference between your answers to 17(d) and 17(e).
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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