Physics, 05.10.2019 06:50 jacquilynfoster7
Asample of 25 seniors from a large urban school district has a mean verbal sat score of 450. assume we know that the standard deviation of the population of verbal sat scores for seniors in the district is s=100. a 90% confidence interval for the mean score µ for the population of seniors is used. which of the following will produce a confidence interval with a smaller margin of error?
using a confidence interval of 95%
using a sample of 100
using an upper critical value of 99%
using a sample of 15 seniors
using any sample size smaller than 25
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