A researcher wanted to see whether there were any differences in the effectiveness of one-on-one versus small-group cognitive behavior therapy for treating social anxiety disorder. 62 participants were randomly assigned to the two conditions, resulting in 31 per group. The mean and standard deviation for the one-on-one group were 14.6 and 5.4, respectively. The mean and standard deviation for the small group condition were 12.7 and 6.8, respectively. 1. Is this a between-groups or within-groups design? 2. What is the value of t? 3. Should you use a 1-tailed or 2-tailed test? 4. What are the degrees of freedom (df) for this study? 5. What is the critical value of t for alpha level of .05 for your study (use table in PowerPoint)? 6. Was there a significant difference between the groups? Justify your answer.
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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