Mathematics, 08.03.2021 21:30 skylex
In a random sample of 80 teenagers, the average number of texts handled in a day is 50. The 96% confidence interval for the mean number of texts handled by teens daily is given as 46 to 54. a) Find the value of standard deviation that was used to calculate this CI. b) If the number of participants per sample were doubled, by what factor would the confidence interval change (that is, keeping the same confidence level)
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In a random sample of 80 teenagers, the average number of texts handled in a day is 50. The 96% conf...
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