Gooogness to fit
L1. L2. L3
18. .20. 19.2
12. .10. 9.6
14. .15. 14.4
16. .15. 14.4
21. .20. 19.2
15. .20. 19.2
Tie ti 84
X2=1.95.
P=X2cdf(195,E99,5)= .8567 is right
But I keep get for p.8560 I'm not understanding where I'm going wrong
Thank u
To calculate the probability value using the TI-84 calculator, you can use the X2cdf function. Let's break down the steps to understand how to get the correct result:
1. First, input the observed value of the test statistic (X2) into the calculator. In this case, X2 = 1.95.
2. Next, you need to specify the degrees of freedom (df) for the chi-square distribution. In your question, you mentioned df = 5.
3. Using the X2cdf function, you can calculate the probability value. The syntax for the X2cdf function on the TI-84 calculator is as follows: X2cdf(X, df). In your case, the function is X2cdf(1.95, 5).
Now, let's calculate the probability value:
1. Press the [2nd] key on your calculator, and then press [VARS] to access the DISTR menu.
2. Scroll down or use the appropriate key to select "3: X2cdf(."
3. Enter the observed value of the test statistic (X2) as 1.95.
4. Enter the degrees of freedom (df) as 5.
5. Press [ENTER] to calculate the probability value.
According to your calculations, you obtained a probability value of 0.8560, but you expected the result to be 0.8567. The difference between these two values may be due to rounding errors or calculation precision on your calculator.
To increase the precision of the calculator, you can adjust the number of decimal places displayed. Press the [MODE] key, scroll down to "FLOAT" on the sixth line, and select a higher precision, such as "D: 9" to display more decimal places.
By following these steps accurately, you should be able to obtain the correct probability value on your TI-84 calculator.