(c) Number of books in the college bookstore (d) Weight of a football player chosen at random (e) Number of lightning strikes in Rocky Mountain National Park on a given day 3. Statistical Literacy Consider each distribution. Determine if it is a valid probability distribution or not, and explain your answer. (a) 1 (b) 1 P(x) 0.25 0.60 0.15 P(x) 0.25 0.60 0.20 Statistical Literacy At State College all classes start on the hour, with the ear- liest start time at 7 A.M. and the latest at 8 P.M. A random sample of freshmen 4. showed the percentages preferring the listed start times. Start Time 7 or 8 A.M. 9,10,or 11A.M. 12 or 1 P.M. 1 P.M., or later after 5 P.M., % preferring 10% 35% 28% 25% 15% Can this information be used to make a discrete probability distribution? Explain. 5.| Statistical Literacy Consider two discrete probability distributions with the same sample space and the same expected value. Are the standard deviations of the two distributions necessarily equal? Explain. Focus Page 2 of 3 229 words English (United States) 909 MAR étv 23 3D

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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.