Evaluation using a chi-square test for goodness of fit

Reference no: EM13102571

A researcher would like to test the claim that 9 out of 10 doctors prefer Brand X. A sample of 60 doctors is obtained and each is asked to compare Brand X with another leading brand. The data show that 48 of the doctors picked Brand X. If these data are evaluated using a chi-square test for goodness of fit, what is the expected frequency for Brand X?

a) 9

b) 12

c) 48

d) 54

Reference no: EM13102571

Questions Cloud

Estimate continuing usefulness of wirth-s approach : sed on understanding of readings, and videos to date, estimate the continuing usefulness of Wirth's approach for understanding life in contemporary cities.

Performance of z-test as opposed to a t-test : Describe when a z-test should be performed as opposed to a t-test? Which (if any) can we use all the time? Why or why not?

Desirable confidence interval : What happens to the confidence interval when we go from a 95% confidence level to a 99% confidence level? Is this desirable? When would we want to use a 99% confidence interval?

Why is it significant to secure windows and unix servers : CIO has asked you to describe why you suggest it is so significant to secure your Windows and Unix/Linux servers from known shortcomings/vulnerabilities.

Evaluation using a chi-square test for goodness of fit : The data show that 48 of the doctors picked Brand X. If these data are evaluated using a chi-square test for goodness of fit, what is the expected frequency for Brand X?

Determining probability-random variables : Let the random variable X denote the number of emergency calls received by the campus police office each day. The probability mass function of X is given by:

How formal organizations have evolved over past century : Describe how formal organizations have evolved over past century. Write down differences were there in organizations a century ago, compared to today's organizations?

Evidence of a difference in the mean waiting time : Assuming the population variances from both offices are equal, is there evidence of a difference in the mean waiting time between the two offices? Use α = 0.05

What is the research design and its variables : A sample of patients for one busy primary care practice is used as the comparison group. What is the research design and its variables?

User Account

All Pages