One college class had a total of 70 students. The average score for the class on the last exam was 82.1 with a standard deviation of 5.8. A random sample of 35 students was selected. a. Calculate the standard error of the mean. b. What is the probability that the sample mean will be less than 84? c. What is the probability that the sample mean will be more than 83? d. What is the probability that the sample moan will be between 81.5 and 83.5? a. The standard error of the mean is. (Round to two decimal places as needed.) b. The probability that the sample mean will be less than 84 is (Round to four decimial places as needed.) c. The probability that the sample mean will be more than 83 is (Round to four decimal places as needed.)
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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