In a one-sample t-test, we take a small sample of data from a large population. For example, a small sample of 10 students from a large population of 150 students. The formula then takes the average of a small sample and compares it with the average of the population to check if the...
Oncet-test statistic valueis determined, you have to read int-test tablethecritical value of Student’s t distributioncorresponding to thesignificance level alphaof your choice (5%). Thedegrees of freedom(df) used in this test are :
Excel formula assistance Countif / Countifs have issues due to the time format and pivot table options have not worked very easily either. Looking to create a list which other workbooks can use at the same time for statistic purposes. Copied a number of emails from outlook to count the num...
In a two-sample test, we are comparing means (for example, testing a claim that a certain brand of light bulbs lasts longer than another). Two-sample tests could use either a z-test or a t-test. In a two-sample z-test, the test statistic z is calculated with z=x―d−μdσ12...
Phrases such as 'I scored in the 80th percentile on the ACT', or 'That baby is in the 15th percentile for weight' both use the term percentile. Talking about percentile is common throughout life, but what does it really mean? Percentile describes a range that a statistic (such as a ...
Can’t see the video? Click here to watch it on YouTube. Step 1: Type your data into two columns in Excel. For example, type your “x” data into column A and your “y” data into column B. Step 2: Select any empty cell. Step 3: Click the function button on the ribbon. St...
significance. This test is applicable in situations where there are precisely two groups to compare, such as assessing the performance of students who underwent distinct teaching methods. By calculating a t-statistic and comparing it to a critical value, the t-test allows for the evaluation of ...
Test Statistic:The chi-square statistic (chi^2) is calculated by comparing observed and expected frequencies in a contingency table. Degrees of Freedom:In a chi-square test, degrees of freedom are calculated based on the number of categories in each variable. For a contingency table with r row...
On a graph, the p-value will be the area beyond the test statistic. You will need to take into account the inequality in the alternative hypothesis to make sure you are finding the correct area. For instance, if the test is two-tailed, then you may need to double the area to find ...
The CAPM can be an important statistic to follow, but generally, it is not always best used on its own. That’s why it forms the basis for theefficient market hypothesisand the building of an efficient frontier curve. Efficient Frontier Curves An efficient frontier curve involves ...