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You would like to estimate the average amount a family spends on food during a year.In the past,the standard deviation of the amount a family has spent on food during a year has been approximately $800.If you want to be 95% sure that you estimated average family food expenditures within $50,how many families do you need to survey?
Epilepsy
A neurological disorder marked by sudden recurrent episodes of sensory disturbance, loss of consciousness, or convulsions, associated with abnormal electrical activity in the brain.
Surgery
A branch of medicine that involves the physical intervention on tissues and is often performed to treat a disease or injury.
Coma
A state of deep unconsciousness that lasts for a prolonged or indefinite period, often caused by severe illness or injury.
Schizophrenia
A chronic and severe mental disorder affecting a person’s thoughts, feelings, and behavior, leading to impaired functioning in daily life.
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