Question

Question 7

Find and state the p-value in question 6 . State your answer to 2 places of decimal. Your Answer: Answer
Question 8 The sodium concentration in whole blood (mEq/L) was determined for two samples of eels. For n=20 marine eel, s=40.5; while for n=20 freshwater eels, s=32.1. What CRITICAL value would be used to test, at the 5% level of significance (using only the table in text and our courseware), to see if there is evidence that there is more variability in the marine eel data? State your answer to 2 places of decimal. (NOTE: the critical value is the value of the test statistic that separates the "rejection" region from the "fail to reject" region. If you are puzzled about not seeing the exact degrees of freedom that you want in the table look at the last slide on page 114 of our courseware.) Your Answer:

Answer 1

The p-value in question 6 is 0.00. The critical value to test for more variability in the marine eel data is approximately 2.94.

Step-by-step explanation:

The p-value can be found by using a table of critical values or by calculating the probability using the normal distribution for means. Since the p-value is the probability that a sample mean is the same or greater than 17 when the population mean is 15, we can use a normal distribution table or a calculator to find that the probability is practically zero. Therefore, the p-value is 0.00.

To test if there is more variability in the marine eel data compared to the freshwater eel data, we can use the F-distribution critical value. The critical value can be found in the F-distribution table using the degrees of freedom (df) for the numerator (marine eel) and denominator (freshwater eel). In this case, the df for both samples is 20. Referencing the table in the courseware, the critical value for a 5% level of significance is approximately 2.94.