A consumer product magazine recently ran a story concerning the increasing prices of digital cameras. The story stated that digital camera prices dipped a couple of years ago, but now are beginning to increase in price because of added features. According to the story, the average price of all digital cameras a couple of years ago was $215.00. A random sample of cameras was recently taken and entered into a spreadsheet. It was desired to test to determine if that average price of all digital cameras is now more than $215.00. The information was entered into a spreadsheet and the following printout 20) was obtained: One-Sample T Test Null Hypothesis: u = 215 Alternative Hyp: µ > 215 95% Conf Interval Variable T DF P Upper Camera Price 245.23 15.620 212.740 277.720 Mean SE Lower 1.94 21 0.0333 Cases Included 22 Is a sample size n= 22 large enough to utilize the central limit theorem in this inferent procedure? A) Yes, since the central limit theorem works whenever means are used B) No, since n<30 C) Yes, since both np and nq are greater than or equal to 15 D) No, since either np or nq is less than 15
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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