Mathematics, 14.10.2019 10:00, TaraC
You are interested in purchasing a new car. one of the many points you wish to consider is the resale value of the car after 5 years. since you are particularly interested in a certain foreign sedan, you decide to estimate the resale value of this car with a 90% confidence interval. you manage to obtain data on 17 recently resold 5-year-old foreign sedans of the same model. these 17 cars were resold at an average price of $12,630 with a standard deviation of $800. suppose that the interval is calculated to be ($12,291.23, $12,968.77). how could we alter the sample size and the confidence coefficient in order to guarantee a decrease in the width of the interval?
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