How to Find Test Statistic and P Value on Statcrunch

By Kur_417Mikayla 19 May, 2022 Post a Comment

To find r Test Statistic and p-value. I like to solve these types of problems using StatCrunch.

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Enter Predict y for x valueSelect Prediction LevelCompute.

. If you are taking 5 significance level p005 then P X 18 must be less than 0025 in order to reject H 0. Computing the P-Value using the Test Statistic and StatCrunch in a Right Tailed Z-Test. So I call up my little calculator here take 1 minus this value here and there is my P-value.

We get the p-value as 00183. Enter in the degrees of freedom and the last line should read. Under Perform the Hypothesis test for μ 1 - μ 2 is selected by default.

StatRegressionSimple linearEnter x y variableschange the inequality in the hypothesisCompute. The alternative hypothesis can be changed to or. The output table provides various statistics from this test including the test statistic and the P-value.

First find the critical values of z using the StatCrunch normal calculator. We have to look at the value of 209 is the z table. PXgiven test stat_____.

Leave the null value at 0 to directly compare the two means. Here I entered 09 and clicked Compute. The corresponding p-value is 008662.

But the P-value is the area of the tails so I have to take the complement of this area thats between the tails to get the area of the tails. Do not convert the sample s to the standard error sigma sub x-bar as we did using Excel because StatCrunch has that step built-in. To view the hypothesis test results.

Stat Calculators Normal. Open Statcrunch click stat calculators and chi-square. Since H 1 05 you will use two-tailed test.

So we have to look at -20 in the z column and the value in the 009 column. The output table below provides various. If youre asked to find a CI for a standard deviation youll need to take the square root of the lower and upper bounds.

However that is not the case so H 0 is accepted and hence the claim. Then find P X 18 P X 18 P X 175 P Z 175 145 725 P Z 1114 01327. P Value 00183.

We can simply enter the value for t and the degrees of freedom then select one-tailed then click the Calculate button. For this example change the alternative hypothesis to to test if the mean amount of apple juice in a bottle is actually lower than the 6405 ounce standard. To view the hypothesis test results.

StatCrunch gives includes the test statistic. To do this were going to use the P-value method as we were instructed earlier. Since the normal distribution is symmetrical the area to the right of the curve is equal to that on the left.

I prefer to use the Between option for two-tailed tests and enter the confidence level c 1- alpha in the probability box. Our P-value is almost 20 and since that is greater than 1 our P-value is greater than alpha. This process in StatCrunch is inference for a VARIANCE not standard deviation which is common so if the question asks you for a CI for a variance what you get from StatCrunch is exactly what you need.

Use the T-Stat P-value of the slope. Remember that in StatCrunch this Between option is calculating the area in between the tails. T Score to P Value Calculator.

This means we compare our P-value with our significance level alpha from our problem state. Enter the sample mean sample standard deviation and n. 103 Prediction Intervals StatRegressionSimple LinearEnter x y variableSelect CI.

Finding P-Values when Test Statistic is given. The first way to find a p-value from a t statistic is to use an online calculator like the T Score to P Value Calculator. And we see that alpha equals 1.

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