Questions from Business Statistics

Q: There is some concern that if a woman has an epidural to

There is some concern that if a woman has an epidural to reduce pain during childbirth, the drug can get into the baby bloodstream, making the baby sleepier and less willing to breastfeed. The Interna...

Q: The National Center for Education Statistics reports average mathematics achievement scores for

The National Center for Education Statistics reports average mathematics achievement scores for eighth graders in all 50 states (nces.ed.gov/nationsreportcard/): 1. Using technology and the provided d...

Q: A survey6 of articles from the New England Journal of Medicine (

A survey6 of articles from the New England Journal of Medicine (NEJM) classified them according to the principal statistics methods used. The articles recorded were all non-editorial articles appearin...

Q: In Exercise 23, the table shows results of a study investigating

In Exercise 23, the table shows results of a study investigating whether aftereffects of epidurals administered during childbirth might interfere with successful breastfeeding. Were planning to do a c...

Q: The table in Exercise 24 shows whether NEJM medical articles during various

The table in Exercise 24 shows whether NEJM medical articles during various time periods included statistics or not. Were planning to do a chi-square test. 1. How many degrees of freedom are there? 2....

Q: In Exercises 23 and 25, we’ve begun to examine the possible

In Exercises 23 and 25, we’ve begun to examine the possible impact of epidurals on successful breastfeeding. 1. Calculate the component of chi-square for the epidural/no breastfeeding cell. 2. For thi...

Q: In Exercises 24 and 26, we’ve begun to examine whether the

In Exercises 24 and 26, we’ve begun to examine whether the use of statistics in NEJM medical articles has changed over time. 1. Calculate the component of chi-square for the 1989/No cell. 2. For this...

Q: In Exercises 23, 25, and 27, we’ve tested a

In Exercises 23, 25, and 27, we’ve tested a hypothesis about the impact of epidurals on successful breastfeeding. The following table shows the test residuals. 1. Show how the residu...

Q: In Exercises 24, 26, and 28, we’ve tested a

In Exercises 24, 26, and 28, we’ve tested a hypothesis about whether the use of statistics in NEJM medical articles has changed over time. The table shows the test residuals. 1. Show...

Q: In Exercises 23, 25, 27, and 29, we’ve

In Exercises 23, 25, 27, and 29, we’ve looked at a study examining epidurals as one factor that might inhibit successful breastfeeding of newborn babies. Suppose a broader study included several addit...