'A researcher is interested in finding 959 confidence interval for the mean number of times per day that college = students text: The study included 137 students who averaged 42.6 texts per day: The standard deviation was 20.6 texts. Round answers to 3 decimal places where possible To compute the confidence interval use distribution. b. With 959 confidence the population mean number of texts per day is between texts and'
Added by Joann M.
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05. Since the sample size is greater than 30, we can use the standard normal distribution to find the z-score. The z-score for a 95% confidence level is 1.96. Show more…
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