mean PEF

Which of the following is true?
September 27, 2019
a study is performed
September 27, 2019

Question

An investigator conducts a study to investigate whether there is a difference in mean PEF in children with chronic

bronchitis as compared to those without. Data on PEF are collected and summarized below. Based on the data, is there statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without? Apply the appropriate test at alpha=0.05

1. Critical t value=

2. Computed t= 

3. Based on comparing the critical t value to the computed t value which of the following is (are) true?

A. There is statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without.

B. There is not statistical evidence of a lower mean PEF in children with chronic bronchitis as compared to those without.

C. There is not enough date points to reach a conclusion.

D. Answers B and C.

 
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