You are interested in finding a 95% 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 15 randomly selected college students. 0 3 7 9 9 11 5 11 10 9 8 10 6 12 6 a. To compute the confidence interval use a ____ distribution. b. With 95% confidence the population meannumber of days of class that college students miss is between ____ and ______ days. c. If many groups of 15 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.
Unitary Method
The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products.
Speed, Time, and Distance
Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.
Profit and Loss
The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.
Units and Measurements
Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.
You are interested in finding a 95% 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 15 randomly selected college students.
| 0 | 3 | 7 | 9 | 9 | 11 | 5 | 11 | 10 | 9 | 8 | 10 | 6 | 12 | 6 |
a. To compute the confidence interval use a ____ distribution.
b. With 95% confidence the population meannumber of days of class that college students miss is between ____ and ______ days.
c. If many groups of 15 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
Step by step
Solved in 2 steps with 4 images
