Determining the percentile rank
The following frequency distribution presents a set of exam scores for a class of N = 20 students. What is the percentile rank for X = 90?
x f cf c%
90-99 4 20 100
80-89 7 16 80
70-79 4 9 45
60-69 3 5 25
50-59 2 2 10
Now Priced at $10 (50% Discount)
Recommended (96%)
Rated (4.8/5)
Suppose we have a population of scores with a mean (µ) of 975 and a standard deviation (s) of 15. What percentage of the population will lie between 960 and 990?
A researcher has reason to believe that, for an experiment with 50 points, a 95% prediction interval would be of width 8. If the researcher wishes to run a more precise experiment that will result in a 95% prediction interval of width 4, then the
Find examples in the research that utilize the independent and dependent t-tests that are used to answer a question. Find the t value and its associated p value.
What is the probability that a baby is born between 5:15 and 5:25, given that it was born between 5:00 and 6:00?
The concept of Type I and Type II Error is critical and will come into play with each and every statistical test you perform. Discuss the implications of making both a Type I and Type II error.
Suppose the probability distribution X= number of jobs held during the past year. Find the probability that a randomly selected student held two or few jobs during the past year.
When 325 college students are randomy selected and surveyed, its found that 117 own cars. Construct a 99% confidence interval estimate of the true proportion of all college students who own cars.
A random sample of discount prices gives the following prices: 221, 286, 290, 330, 310, 250, 270, 280, 299, 265, 291, 275, and 281. At one percent level of significance, can you conclude that the mean fare has increased?
1940831
Questions Asked
3,689
Active Tutors
1427531
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
Sahir is the most active student in your kindergarten class. He tends to be very disruptive when the teacher you work with is teaching the class,
Think about where you were the most and least engaged when reading a classmate's draft. Think about what captured your attention
Examine historical literature to the most current period to see the growth of romanticism and EXISTENTIALISM. any major developments
Bearing in mind that there may be several, choose a social, behavioral, or cultural factor associated with your selected domestic violence
Provide five (5) reasons why working from a person centred, strengths-based positive framework, and providing positive lifestyle strategies can reduce
Early food experiences can impact development over several learning domains, including Social and Emotional Development, Language
Which of the following is a behavioral indicator related to Family? A) Developing school readiness and transition strategies B) Developing collaborative