Use the following data to answer the next five exercises: A pair of studies was performed to measure the effectiveness of a new software program designed to help stroke patients regain their problem-solving skills. Patients were asked to use the software program twice a day, once in the morning and once in the evening. The studies observed 200 stroke patients recovering over a period of several weeks. The first study collected the data in Table 1.31. The second study collected the data in Table 1.32.

Given what you know, which study is correct?

Short Answer

Expert verified

Out of the given studies, the first one seems to be correct.

Step by step solution

01

Concept Introduction

Statistics, sometimes known as the "Science of Facts," allows us to derive conclusions from a set of data. It can also assist people in all industries in answering research or business queries, as well as forecast outcomes, such as what show you should watch next on your favorite video app.

02

Explanation

In the first research, participants who used the program improved more than those who did not. When compared to those who did not use the program, the number of participants who exhibited no progress is significantly lower for those who used it. The difference in numbers in the second study is slight, whereas the difference in numbers in the first research demonstrates that the program was effective in displaying effective progress. As a result of the observations, the initial study appears to be correct.

03

Final answer

Hence, the first study seems to be correct out of the given studies.

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Most popular questions from this chapter

Insurance companies are interested in the mean health costs each year of their clients, so that they can determine the costs of health insurance.

Use the following data to answer the next five exercises: Two researchers are gathering data on hours of video games played by school-aged children and young adults. They each randomly sample different groups of 150 students from the same school. They collect the following data.

Would the sample size be large enough if the population is the students in the school?

Suppose you want to determine the mean number of cans of soda drunk each month by students in their twenties at your school. Describe a possible sampling method in three to five complete sentences. Make the description detailed.

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a. What is the frequency for CEO ages between 54 and 65?

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d. What is the cumulative relative frequency for CEOs younger than 55?

e. Which graph shows the relative frequency and which shows the cumulative relative frequency?

The data are the areas of lawns in square feet. You sample five houses. The areas of the lawns are 144sq. feet, 160sq. feet, 190sq. feet, 180sq. feet, and 210sq. feet. What type of data is this?

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