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?
1937584
Questions Asked
3,689
Active Tutors
1440318
Questions Answered
Start Excelling in your courses, Ask a tutor for help and get answers for your problems !!
How can I rephrase this paragraph? The exploration between the "Personal unconscious" and the "Collective Unconscious" in C.G. Jung's perspective
Question: Explain the four attachment styles and the effects of negative attachments on preschool and school-aged children.
Maria, a clinical mental health counselor, has been working with a client, Emily, for several months. Emily is a 32-year-old woman who recently went through
Can you please summarize the key points related to Post-Traumatic Stress Disorder (PTSD) as classified in the DSM-5, including its criteria
Teenagers understand well that death is inevitable and that they themselves will die one day. What typical adolescent behavior seemingly contradicts this knowl
Which of Greer's responses to impending death is Jamila demonstrating? Need Assignment Help?
Question: Education is important because it helps children develop their cognitive, behavioral, and psychomotor skills.