Best writers. Best papers. Let professionals take care of your academic papers

Order a similar paper and get 15% discount on your first order with us
Use the following coupon "FIRST15"
ORDER NOW

Peak expiratory flow (PEF)

/in /by

Question

Need help with this problem please.Peak expiratory flow (PEF) is a measure of patient’s ability to expel

air from lungs. Patients with asthma or other respiratory conditions often have restricted PEF. The mean PEF for children free of asthma is 306. An investigator wants to test whether children with chronic bronchitis have restricted PEF. A sample of 40 children with chronic bronchitis are studied and their mean PEF is 279 with a standard deviation of 72. Alpha = 0.05

a. Critical value:

b. Computed z

 
Looking for a Similar Assignment? Order now and Get 10% Discount! Use Coupon Code "Newclient"