A researcher is interested in finding a 98% confidence interval for the mean number of times per day that college students text. The study included 99 students who averaged 32.3 texts per day. The standard deviation was 19.2 texts. Round answers to 3 decimal places where possible. a. To compute the confidence interval use at distribution. b. With 98% confidence the population mean number of texts per day is between and texts. c. If many groups of 99 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals percent will not will contain the true population number of texts per day and about contain the true population mean number of texts per day.

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A researcher is interested in finding a 98% confidence interval for the mean number of times per
day that college students text. The study included 99 students who averaged 32.3 texts per day.
The standard deviation was 19.2 texts. Round answers to 3 decimal places where possible.
a. To compute the confidence interval use a t
distribution.
b. With 98% confidence the population mean number of texts per day is between
and
texts.
c. If many groups of 99 randomly selected members are studied, then a different confidence
interval would be produced from each group. About percent of these confidence intervals
percent will not
will contain the true population number of texts per day and about
contain the true population mean number of texts per day.
Transcribed Image Text:A researcher is interested in finding a 98% confidence interval for the mean number of times per day that college students text. The study included 99 students who averaged 32.3 texts per day. The standard deviation was 19.2 texts. Round answers to 3 decimal places where possible. a. To compute the confidence interval use a t distribution. b. With 98% confidence the population mean number of texts per day is between and texts. c. If many groups of 99 randomly selected members are studied, then a different confidence interval would be produced from each group. About percent of these confidence intervals percent will not will contain the true population number of texts per day and about contain the true population mean number of texts per day.
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