A researcher wants to asses the self-discipline levels among undergraduate and graduate students. A random sample of 300 undergraduate students was selected with average score of 184 and standard deviation of 16 ( group 1). Also , a random sample of 350 graduate students was selected with average score of 153 and standard deviation of 21 ( group 2). Is this enough evidence to conclude that undergraduate students score less, on average than the graduate students. [ assume that the population variances are equals]. i. What is the value of the pooled sample variance for the difference between the sample means? ONone of these O1.48 O16.15 O355.64 O18.86 ii. What is the value of the test statistic for testing the hypothesis Hou,-H2=0 against ONone of these 03.37 O-3.37 O-3.44 Oo 27

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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.