Lester Hollar is vice president for human resources for a large manufacturing company. In recent years, he has noticed an increase in absenteeism that he thinks is related to the general health of the employees. Four years ago, in an attempt to improve the situation, he began a fitness program in which employees exercise during their lunch hour. To evaluate the program, he selected a random sample of eight participants and found the number of days each was absent in the 6 months before the exercise program began and in the 6 months following the exercise program. Following are the results. Employee Before After 1 2 6 7 4 4 4 3 5 2 Click here for the Excel Data File At the 0.100 significance level, can he conclude that the number of absences has declined? e. What are the null and alternate hypotheses? O Ho: HBefore - HAnter = Has0 H: Ho>0 O Ho: VBefore - HAfter = Hos0 HE Ha0 b. Compute the test statistic. (Round your answer to 3 decimal places.) Test statistic c. Compute the pvalue. NOTE: P-value calculators are available through online search. (Round your answer to 4 decimal places.) p-value

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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.