# Ask questions and get free answers from expert tutors

The National Association of Realtors estimates that 23% of all homes purchased in 2004 were considered investment properties. If a sample of 800 homes sold in 2004 is obtained what is the probability...

In a survey of families in which both parents work, one of the questions asked was, "Have you refused a job, promotion, or transfer because it would mean less time with your family?" A total...

nd the standard deviation, s, of sample data summarized in the frequency distribution table given below by using the formula below, where x represents the class midpoint, f represents the class frequency,...

The amount of non-mortgage debt per household for households in a particular income bracket in one part of the country is normally distributed with mean \$28,350 and standard deviation \$3,425....

To help with a question that I can't answer

The pulse rates of 141 randomly selected adult males in the town of Roaches, Illinois vary from a low 43 bpm (beats per minute) to a high 119 bpm.  Calculate the minimum sample size required...

X         Y   Mean            3         85   Standard deviation           11...

A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 280 babies were born, and 252 of them were girls. Use the sample data to construct a 99% confidence...

I just need help solving this problem. Im not exactly sure where to start

Suppose that the following is to be tested: Ho: p = 0.35 and Hi: p>0.35. Calculate the observed z-statistic for the following sample data: 40 out of 80 test subjects have the characteristic of...

Jack and Jill are not particularly good at getting to work on time. The probability that Jill arrives on time is 0.68. The probability that Jack arrives on time is 0.75. But if Jill has made it to...

Students enrolled in an introductory statistics course at a university were asked to take a survey that indicated whether the student has a visual or verbal learning style. Of the 39 students who...

I am working on a research project and I am having a hard time on quantitative data analysis. I will use an assessment that provided a score between 0-313 and 313 is 100%. Which level of data measurement...

The mean and standard deviation of five observations are 9 and 0 respectively. If one of the observations is changed such that the mean of the new set of five observations becomes 10, what is their...