her is interested in finding a 90% confidence interval for the mean number of times per day that college students text. The study included 120 students who averaged 34.6 texts per day. The standard deviation was 13.2 texts. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a ? distribution. b. With 90% confidence the population mean number of texts per day is between __ and __ texts. c. If many groups of 120 randomly selected members are studied, then a different confidence interval would be produced from each group. About ___ perce
A researcher is interested in finding a 90% confidence interval for the mean number of times per day that college students text. The study included 120 students who averaged 34.6 texts per day. The standard deviation was 13.2 texts. Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a ? distribution.
b. With 90% confidence the population mean number of texts per day is between __ and __ texts.
c. If many groups of 120 randomly selected members are studied, then a different confidence interval would be produced from each group. About ___ percent of these confidence intervals will contain the true population number of texts per day and about ___ percent will not contain the true population mean number of texts per day.
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