You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 12 randomly selected college students. 8 4 3 2 9 6 11 11 1 7 0 0 a. To compute the confidence interval use a ? z t distribution. b. With 90% confidence the population mean number of days of class that college students miss is between______ and___________ days. c. If many groups of 12 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About_________ percent of these confidence intervals will contain the true population mean number of missed class days and about ________percent will not contain the true population mean number of missed class days.
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for 12 randomly selected college students.
| 8 | 4 | 3 | 2 | 9 | 6 | 11 | 11 | 1 | 7 | 0 | 0 |
a. To compute the confidence interval use a ? z t distribution.
b. With 90% confidence the population mean number of days of class that college students miss is between______ and___________ days.
c. If many groups of 12 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About_________ percent of these confidence intervals will contain the true population mean number of missed class days and about ________percent will not contain the true population mean number of missed class days.
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