Independent t-test A researcher wants to know whether people who own dogs are less likely to visit their doctor. A sample of dog owners is compared to a similar group of people (matched for age and health) who are not dog owners. The researcher records the number of visits to the doctor during the past two years for each person. The data is analyzed using SPSS and the following output is obtained: Group Statistics Std. Deviation Std. Error Mean Dog_Ownership N. Mean doctor_visits no dog 8 7.8750 2.47487 .87500 dog owner 8 4.3750 2.38672 .84383 Independent Samples Test Levene's Test for toality of Variances Hest for tquaity of Means OSK Confdence iteral of the Difference S, 2- taled Mean Difference S. Erar Deerence Sig df Lower Upper 3.50000 Equal variances assumed 6.10720 doctor viits 000 1.000 2.879 14 012 121s00 920 012 Equal variances net assumed 2.879 13.92 3.50000 121560 6.10752

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Q: WHAT IS H0 AND H1 MEANS?

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Angles

In mathematics, angles constitute a very important part. Just like the concept of lines, an angle is a necessary figure that is used for measurement. How do you define its formation? It is formed when two or more lines meet at a point. The point at which two or more lines meet is known as the vertex. When the lines get inclined at this point, they do form various angles. Angles are measured from the vertex in terms of degrees.