1.On day two of a study on body temperatures, 106 temperatures were taken.Suppose that we only have the first 10 temperatures to work with.The mean and standard deviation of these 10 scores were 98.44^oF and 0.30^oF, respectively.Construct a 95% confidence interval for the mean of all body temperatures.

2.In a time use study 20 randomly selected managers were found to spend a mean time of 2.4 hours per day on paperwork.The standard deviation of the 20 scores was 1.30 hours.Construct a 98% confidence interval for the mean time spent on paperwork by all managers.

3.The National Center for Education Statistics surveyed 4400 college graduates about the lengths of time required to earn their bachelor's degrees.The mean was 5.15 years and the standard deviation was 1.68 years.Based on the above information, construct a 98% confidence interval for the mean time required to earn a bachelor's degree by all college students.

4.A study was made on the amount of converted sugar in a certain process at various temperatures. The data were coded and recorded as follows:

temperature 1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Amount of 1.8 1.9 2 sugar 8.1 7.8 8.5 9.8 9.5 8.9 8.6 10.2 9.3 9.2 10.5