Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
A consumer psychologist asked to test a claim by a swimming school that its instructors could teach the average seven-year-old to swim across an Olympic-sized pool in less than 2 minutes. The psychologist arranged for eight randomly selected seven-year-old children to take lessons at the school and recorded how long it took each child to swim across a pool at the end of the lessons. The times (in seconds) were 60, 120, 110, 80, 70, 90, 100, and 130. What conclusion would the psychologist draw following a t test for a single sample using 120 seconds as the "known" population mean and the .05 significance level?
First of all, what type of t test would you use here? You are comparing your test group against the "known" population.
Next, using the results I have provided below, tell me if this study is significant and why. (You don't have to work anything out; just analyze the study's results that are presented.)
df = 7
Cutoff t score needed = -1.895 (p < .05, 1-tailed)
t = 2.88
Assume that two samples are independent simple random samples selected from normally distributed populations. Use a 0.05 significance level to test the claim that male and female biology students speak the same mean number of words in a day.
A Department of Trasporta repot about air travel found that nationwide, 76% of all flights are on time. What is the probablity that you will have have excatly 80 flights on time?
The heights in centimeters of 5 students are: 165, 175, 176, 159, 170. The sample median and sample mean are respectively:
A study of cats and dogs found that 11 of 50 cats and 21 of 50 dogs slept more than 10 hours per day. At the .05 level of significance, is there sufficient evidence to conclude that a difference exists between the proportion of cats and the propor..
Critically discuss the purpose of developing a frequency distribution? What is the relationship between the relative frequency and the cumulative frequency? Could a frequency distribution contain qualitative data? Why?
What is the relationship between pretest scores and final exam scores after controlling for cumulative GPA? He also wants to know about the relationship between pretest scores and final exam scores.
What is the 95% confidence interval estimate of the population mean examination score if a sample of 200 applications provided a sample mean = 935?
The winning team's score in 13 high school basketball games was recorded. If the sample mean is 54.3 points and the sample standard deviation is 11.0 points, find the 98% confidence interval of the true mean.
A Japanese floppy disk manufacturer has a daily production rate of about 20,000 high density 3.5-inch diskettes. Quality is monitored by randomly sampling 200 finished disks every other hour from the production process and testing them for defects..
What two assumptions must be met when you are using the z test to test differences between two means? Can the sample standard deviations s1 and s2 be used in place of the population standard deviations σ1 and σ2?
The preceding Markov chain is called a random walk for we may think of it as being a model for an individual walking on a straight line who at each point of time either takes one step to the right with probability p or one step to the left with pr..
blood pressure is a measure of the blood force against the walls of the arteries. the larger value represents the
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd