a researcher reports that the mean time it takes to complete an experimental task is 1.4...
a researcher reports that the mean time it takes to complete an experimental task is 1.4 + 4 - 8.0 means plus or minus standard deviation seconds if the null hypothesis was that the mean equals 1.0 then what is the effect size for this test using estimated Cohen's d
Homework Answers
d = (1 - 1.4)/8
Cohen's d = 0.05; this is small effect size
Please give me a thumbs-up if this helps you out. Thank you!
Add Answer to:
a researcher reports that the mean time it takes to
complete an experimental task is 1.4...
A researcher reports that the mean difference between two groups is 20.12 and the estimated standard...
A researcher reports that the mean difference between two groups is 20.12 and the estimated standard error for the difference is 2.83. Hence, the conclusion must be to reject the null hypothesis for a two-tailed test at a .05 level of significance. Question 4 options: True or false False
A researcher measures the time (in seconds) it takes a sample of five participants to complete...
A researcher measures the time (in seconds) it takes a sample of five participants to complete a memory task. It took four of the participants 2, 3, 3, and 4 seconds. If M = 3, then what must be the fifth time recorded?
Suppose the rating for this type of behavior by the general public has a mean of...
Suppose the rating for this type of behavior by the general public has a mean of Mgeneral public and a standard deviation o, and the rating for this type of behavior by a mild sports fan has the same distribution, but a mean of Mmild sports fans. Given this situation, what is the formula for Cohen's d to measure the size of the treatment effect in this study? (umild sports fans - general public) / 02 (Hmild sports fans +...
A researcher is interested in estimating the mean time it takes adults to learn a certain...
A researcher is interested in estimating the mean time it takes adults to learn a certain task. He wants to be 90% confident that the mean time for a sample of adults is within 1.8 minutes of u. In a small pilot study the standard deviation of learning times was 6.5 minutes. How large a sample of adults should be tested? Round the critical value to three decimal places.
3. The amount of time it takes to complete a task is normally distributed with a...
3. The amount of time it takes to complete a task is normally distributed with a mean of 34 minutes and a standard deviation of 4 minutes. If I take a sample of 24 people how many of those 24 people on average will take over 37 minutes to do the task?
Suppose a researcher wants to learn more about the mean attention span of individuals in some...
Suppose a researcher wants to learn more about the mean attention span of individuals in some hypothetical population. The researcher cites that the attention span (the time in minutes attending to some task) in this population is normally distributed with the following characteristics: 20+_36. Based on the parameters given in this example, answer the following questions: a. What is the population mean (μ)? b. What is the population variance? c. Sketch the distribution of this population. Make sure you draw...
QUESTION 4 If the critical Z is ± 1.96 and the experimental Z is 1.0 that...
QUESTION 4 If the critical Z is ± 1.96 and the experimental Z is 1.0 that means that the null hypothesis is rejected? True False QUESTION 5 In hypothesis testing with a sample size of 25, standard deviation of 2, and the difference between the sample mean and the population mean of +3.0 (positive 3), the Z is positive 7.5? True False
The time needed for college students to complete a certain paper and pencil maze follows a...
The time needed for college students to complete a certain paper and pencil maze follows a Normal distribution with a population mean of 80 seconds and a population standard deviation of 16 seconds. You wish to see if the mean time µ is changed by meditation, so you have a random sample of 12 college students meditate for 30 minutes and then complete the maze. It takes them an average of x = 73.3 seconds to complete the maze, with...
8. A researcher claims that the mean time (in hours) teenagers are on the computes is...
8. A researcher claims that the mean time (in hours) teenagers are on the computes is 3.5 hours per day. The mean time of 15 randomly selected teenagers are on the computer in a day was 3.15 hours with a standard deviation of 0.46 hours. a) Which test will you apply? Why b) State the Null and Alternative hypothesis. c) Check the claim. Explain your steps.
A book about different colleges' reports that the mean time students at a particular university study...
A book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
Suppose the rating for this type of behavior by the general public has a mean of Mgeneral public and a standard deviation o, and the rating for this type of behavior by a mild sports fan has the same distribution, but a mean of Mmild sports fans. Given this situation, what is the formula for Cohen's d to measure the size of the treatment effect in this study? (umild sports fans - general public) / 02 (Hmild sports fans +...
A researcher is interested in estimating the mean time it takes adults to learn a certain task. He wants to be 90% confident that the mean time for a sample of adults is within 1.8 minutes of u. In a small pilot study the standard deviation of learning times was 6.5 minutes. How large a sample of adults should be tested? Round the critical value to three decimal places.
A book about different colleges' reports that the mean time students at a particular university study each week is 1015 minutes. A dean says she believes the mean is greater than 1015 minutes. To test her claim, she takes a random sample of 64 students and finds that the sample mean is 1050 minutes, with standard deviation 150 minutes 4. Show that this meets the requirements for a significance test for a mean. State the null hypothesis and the alternate...
Most questions answered within 3 hours.
-
A 8.62 -m ladder with a mass of 21.1 kg lies flat on the ground.
A...
asked 9 seconds from now -
A mixture contains 5.432 g of
sand and 2.521 g of salt. What is the percentage...
asked 1 minute ago -
What problem would arise from this vanadium-based treatment over
the course of a lifetime in diabetes
asked 47 seconds from now -
Homework: Create a Class.... from scratch
Design , implement and test a class that can be...
asked 14 minutes ago -
A project has a service life of five years with the initial
investment outlay of $200,000....
asked 10 minutes ago -
Employee develop involves longer term training and opportunities
that while not immediately needed on a current...
asked 10 minutes ago -
Why is the reticulum the affected compartment of the
stomach?
Group of answer choices
It has...
asked 12 minutes ago -
(Print distinct numbers) C++
Write a program that reads in 10 numbers and displays distinct
numbers...
asked 13 minutes ago -
A 3.0275 g sample of KHP (a primary standard, 1:1 acid:base,
FM=204.23 g/mol) is titrated with...
asked 18 minutes ago -
1. You need to make an aqueous solution of
0.165 M barium acetate for an
experiment...
asked 18 minutes ago -
Let X be a discrete random variable with the following PMF.
Px(k) =
1/4 for k...
asked 22 minutes ago -
ONLY use the information provided here on the
firm's Mission Statement. Written assessment must include
(1)...
asked 32 minutes ago