Blog

Provide an appropriate response.A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 librarians from each city was randomly selected. The mean from the first city was $28,900 with a standard deviation of $2300. The mean from the second city was $30,300 with a standard deviation of $2100. Construct a 95% confidence interval for μ1 – μ2.

Determine whether the sampling is dependent or independent. Indicate whether the response variable is qualitative or quantitative.One hundred men suffering from high cholesterol were randomly assigned to receive placebo or a cholesterol-lowering medication. After three months, the mean cholesterol level of those receiving placebo was compared with the mean cholesterol level of those receiving the medication.

Provide an appropriate response.The data below are the average one-way commute times (in minutes) for selected students and the number of absences for those students during the term. Find the least-squares regression line for the given data. What would be the predicted number of absences if the commute time was 95 minutes? Is this a reasonable question? Round the predicted number of absences to the nearest whole number. Round the least-squares regression line values to the nearest hundredth. 

Provide an appropriate response.Test the hypothesis that μ1 = μ2. Two samples are randomly selected from normal populations. The sample statistics are given below. n1 = 25 n2 = 30 1 = 22 2 = 20 s1 = 1.5 s2 = 1.9

Which of the following is not a body region of a Mullusk

Sexual reproduction involves two parents contributing games to form the offspring. 

Cnidarians show two different body forms; medusa and polyp. Which statement correctly describes the difference between the two bod forms?

Water enters the roots of a plant as _______ and then exits the stomatal openings as a ______

The significance of a notochord is chordates is that it

The kingdom protista is the most diverse of all Eukaryotic kingdoms.