Question

Studies are often done by pharmaceutical companies to determine the effectiveness of a treatment program. Suppose that a new AIDS antibody drug is currently under study. It is given to patients once the AIDS symptoms have revealed themselves. Of interest is the average length of time in months patients live once starting the treatment. Two researchers each follow a different set of 40 AIDS patients from the start of treatment until their deaths. The following data (in months) are collected.

Researcher 1: 3; 4; 11; 15; 16; 17; 22; 44; 37; 16; 14; 24; 25; 15; 26; 27; 33; 29; 35; 44; 13; 21; 22; 10; 12; 8; 40; 32; 26; 27; 31; 34; 29; 17; 8; 24; 18; 47; 33; 34

Researcher 2: 3; 14; 11; 5; 16; 17; 28; 41; 31; 18; 14; 14; 26; 25; 21; 22; 31; 2; 35; 44; 23; 21; 21; 16; 12; 18; 41; 22; 16; 25; 33; 34; 29; 13; 18; 24; 23; 42; 33; 29

Compute the mean, median, mode, range, and standard deviation for the data sets for each researcher.

Step 1

**Solution: **The mean for the researcher 1's data is:

Step 2

Now, the median of the Researcher 1's data is calculated as:

To find the median, we need to first sort the data in ascending order as:

Now the median is calculated using the below formula:

Step 3

The mode is the most frequently occuring observation in the data. Therefore, the mode of Researche...

Tagged in

Q: You are asked to design a study to investigate the effectiveness of the Atkins diet (IV = diet, DV =...

A: Independent t test:Independent t test determines whether there is significant difference between the...

Q: . A tire manufacturer claims that the mean life of a certain type of tire is more than 30,000 miles....

A: The claim is provided as that the mean, life of a certain type of tire is more than 30,000 miles.a...

Q: Reasons for means and medians being good and misleading.

A: Solution:Definition of mean and median:Mean and median are the measures of central tendency.Arithmet...

Q: The same media consultants decided to continue their investigation of the focal relationship between...

A: Regression analysis:Regression analysis estimates the relationship among variables. That is, it esti...

Q: Is the magnitude of an earthquake related to the depth below the surface at which the quake occurs? ...

A: Part (a):The scatter diagram, along with the best fitted line (least-squares regression line) for th...

Q: Listed below are paired data consisting of amounts spent on advertising (in millions of dollars) and...

A: Let r denote the linear correlation between advertising cost (x) and profit (y). The hypotheses are ...

Q: Consider the probability distributions you have studied so far. Which of the following distributions...

A: Discrete distribution:If the probability of outcome of a statistical distribution is finite, then it...

Q: A librarian would like to determine whether a new book appeals more to adults or to children. The li...

A: Independent samples:Two samples are independent if the sample values selected from one population ar...

Q: Listed below are the number of cricket chirps in 1 min and the corresponding temperatures in degrees...

A: In this question we have given the data about no. of chirps in 1 min and the corresponding temperatu...

Sorry about that. What wasn’t helpful?