A researcher is interested in fınding a 95% confidence interval for the mean number of times per day that college students text. The study included 97 students who averaged 39.8 texts per day. The standard deviation was 18.5 texts. a. To compute the confidence interval use a ? distribution. b. With 95% confidence the population mean number of texts per day is between and texts. c. If many groups of 97 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.
A researcher is interested in fınding a 95% confidence interval for the mean number of times per day that college students text. The study included 97 students who averaged 39.8 texts per day. The standard deviation was 18.5 texts. a. To compute the confidence interval use a ? distribution. b. With 95% confidence the population mean number of texts per day is between and texts. c. If many groups of 97 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.
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Transcribed Image Text:A researcher is interested in finding a 95%
confidence interval for the mean number of
times per day that college students text. The
study included 97 students who averaged
39.8 texts per day. The standard deviation
was 18.5 texts.
a. To compute the confidence interval use a
? distribution.
b. With 95% confidence the population mean
number of texts per day is between
and
texts.
c. If many groups of 97 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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