QUESTION 1

You wish to examine whether hot air hand blowers or paper in a medical facility have an effect on the rate of respiratory incidence.

You follow 98 health care workers in primary care clinic during flu season.

You observe the following incidence of respiratory disease and preferred method of hand drying.

46 workers preferred paper for hand drying, 52 preferred hot air blowers. During the study period 29 of the 98 workers experienced a respiratory illness.

Your null and alternative hypothesis for the Chi Square test comparing the exposure (air vs paper) andoutcome (ill or not ill) is

Hnull There is no association between the drying choice andillness

Halt There is an association between drying choice and illness

True

False

QUESTION 2

What is your estimate of the prevalence/incidence of illness in this population

QUESTION 3

Using the Excel work sheet "PapervsAir.xlsx as a guide complete the expected values

a =

QUESTION 4

Using the Excel work sheet "PapervsAir.xlsx as a guide complete the expected values

b =

QUESTION 5

Using the Excel work sheet "PapervsAir.xlsx as a guide complete the expected values

c =

QUESTION 6

Using the Excel work sheet "PapervsAir.xlsx as a guide complete the expected values

d =

QUESTION 7

Using the Excel work sheet "PapervsAir.xlsx as a guide complete the expected values

Number of Degrees of Freedom for this 2x2 table

QUESTION 8

What is the Critical Value for Chi Square for 1 degree of freedom and acceptable alpha error = 0.05

QUESTION 9

What is the calculated value of Chi Square (without continuity correction) for these findings