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Ascertainment Bias
A possible form of the bias, mainly in retrospective studies, which arises from a relationship amongst the exposure to the risk factor and the probability of detecting the event of interest. In a study comparing women by means of cervical cancer and a control group, for instance, an excess of oral contraceptive use among the cases might possibly be due to more regular screening for disease prevailing among the women are known to be taking the pill.
A consumer product firm finds that its brand of laundry detergent is losing market share, so it decides that it needs to "freshen" the product. One strategy is to maintain the curr
Modern hotels and certain establishments make use of an electronic door lock system. To open a door an electronic card is inserted into a slot. A green light indicates that the doo
The weight in Kg for each person was matched to their intake of fat per day in Grams. 9 people were selected with the following results. Weight (Xi) Fat (Yi) 45
Write a report to an investor comparing the performance by using the financial statements between two different companies
Littlefield Laboratories is a state-of-the-art highly automated blood samples testing lab. The demand of blood sample testing for the previous 20 days (day 1 to day 20) are given i
a prosecuting attorney in a criminal case presented as principal evidence small fragment of glass found imbedded in the coat of the accused.the attorney claimed that the
Reproduction rates: if the majority of births are those of boys the population is bound to decrease while the reverse will be the case if the majority of births are girls. Similar
A thief is running away in his car with a velocity of 20m/s.A police jeep is following him which is sighted by the thief in his rearview mirror, a convex mirror of focal length 10m
how to make assignment maintenance cost control
standard material qty per unit- 2 kg standard price per kg - 4 rs actual value of material purchased- 4000 rs closing stock- 200 kg actual usage- 2.5 kg finished stock sold- 200 u
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