Homework Answers
Add Answer to:
Question 3 (0.5 points) A researcher conducts a study to determine if the mean score for...
Question 2 (0.5 points) A researcher conducts a study to determine if the mean score for...
Question 2 (0.5 points) A researcher conducts a study to determine if the mean score for a sample of n - 30 participants is significantly different from a hypothesized population mean. If the researcher conducts a two-tailed test at an a = .05 level of significance, what is the decision rule for this study? Reject H, at a = .05 if t < - 2.045 or t > 2.045 Reject Ho at a = .05 if t < -2.093 or...
Question 3 5 pts A researcher selects a sample from a population with a mean of...
Question 3 5 pts A researcher selects a sample from a population with a mean of u= 40 and administers a treatment to the individuals in the sample. If the treatment is expected to decrease scores, which of the following is the correct statement of the null hypothesis for a one-tailed test? The researcher can reject the null hypothesis with a = .05 but not with a = .01. The researcher can reject the null hypothesis with either a =...
A researcher conducts a hypothesis test to evaluate the effect of a treatment. The hypothesis test...
A researcher conducts a hypothesis test to evaluate the effect of a treatment. The hypothesis test produces a z-score of z = -2.60. Assuming that the researcher is using a two-tailed test, what is the correct statistical decision? Reject the null hypothesis with α = .05 but not with α = .01. Reject the null hypothesis with either α = .05 or α = .01. Fail to reject the null hypothesis with either α = .05 or α = .01....
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment...
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment effect with ( a = .05). if the sample data produce a Z-score of ( z= -2.24), what is the correct decision? A. Reject the null hypothesis and conclude that the treatment has no effect B. Reject the null hypothesis and conclude that the treatment has an effect C. Fail to reject the null Hypothesis and conclude that the treatment has no effect D....
A researcher obtains t = 2.25 for a repeated-measures study using a sample of n =...
A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants. Based on this t value, what is the correct decision for a two-tailed test? Reject the null hypothesis with a -.05 Reject the null hypothesis with a -01 Fail to reject the null hypothesis with a - .05 Cannot determine without additional information
4) A researcher is testing a hypothesis of a single mean. The critical z value for...
4) A researcher is testing a hypothesis of a single mean. The critical z value for α = .05 and a two tailed test is ±1.96. The observed z value from sample data is minus2.11. The decision made by the researcher based on this information is to _____ the null hypothesis. reject fail to reject redefine change the alternate hypothesis into restate 5) A researcher is testing a hypothesis of a single mean. The critical z value for α =...
A researcher in interested in whether students who are musicians have higher intelligence test sc...
A researcher in interested in whether students who are musicians have higher intelligence test scores than students in the general population. The mean for the general population is 100. The researcher selects musicians from local high schools and gives them an intelligence test, with a mean of 105. SS 725 for the 2. 30 sample Null Hypothesis (Ho): μ State in words: Alternative Hypothesis (Ha): μ > State in words: df= t critical value (with α : .05): One-tailed or...
A researcher records academic performance on students, given old and new teaching rubrics. She had hypothesized...
A researcher records academic performance on students, given old and new teaching rubrics. She had hypothesized that student performance (GPA) would improve when the students were introduced to the new teaching technique. If she uses a related samples t-test to test this hypothesis at .01 level of significance, then what will be the decision if she computes t = 3.459 in a sample of 30 participants? a) Retain the null hypothesis. b) Reject the null hypothesis. c) A decision cannot...
Does ADD to determine if a sample of 41 students having a mean concentration score of...
Does ADD to determine if a sample of 41 students having a mean concentration score of 71 and a standard deviation of 7 is a random sample of a population having a mean of 58. a. What is the name of the appropriate statistical test? b. What is the obtained score? c. What is the critical score (alphas .05 1 tail) d. Do you reject or retain the null hypothesis? relaxation have an effect upon concentration? Researchers examined this possible...
please explain how to do this because i dont get it thank you A researcher uses...
please explain how to do this because i dont get it thank you
A researcher uses two samples, each with n = 15 participants, to evaluate the mean difference in performance scores between 8-year-old and 10-year-old children. The prediction is that the older children will have higher scores. The sample mean for the older children is five points higher than the mean for the younger children and the pooled variance for the two samples is 30. For a one- tailed...
Question 2 (0.5 points) A researcher conducts a study to determine if the mean score for a sample of n - 30 participants is significantly different from a hypothesized population mean. If the researcher conducts a two-tailed test at an a = .05 level of significance, what is the decision rule for this study? Reject H, at a = .05 if t < - 2.045 or t > 2.045 Reject Ho at a = .05 if t < -2.093 or...
Question 3 5 pts A researcher selects a sample from a population with a mean of u= 40 and administers a treatment to the individuals in the sample. If the treatment is expected to decrease scores, which of the following is the correct statement of the null hypothesis for a one-tailed test? The researcher can reject the null hypothesis with a = .05 but not with a = .01. The researcher can reject the null hypothesis with either a =...
A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants. Based on this t value, what is the correct decision for a two-tailed test? Reject the null hypothesis with a -.05 Reject the null hypothesis with a -01 Fail to reject the null hypothesis with a - .05 Cannot determine without additional information
A researcher in interested in whether students who are musicians have higher intelligence test scores than students in the general population. The mean for the general population is 100. The researcher selects musicians from local high schools and gives them an intelligence test, with a mean of 105. SS 725 for the 2. 30 sample Null Hypothesis (Ho): μ State in words: Alternative Hypothesis (Ha): μ > State in words: df= t critical value (with α : .05): One-tailed or...
Does ADD to determine if a sample of 41 students having a mean concentration score of 71 and a standard deviation of 7 is a random sample of a population having a mean of 58. a. What is the name of the appropriate statistical test? b. What is the obtained score? c. What is the critical score (alphas .05 1 tail) d. Do you reject or retain the null hypothesis? relaxation have an effect upon concentration? Researchers examined this possible...
please explain how to do this because i dont get it thank you
A researcher uses two samples, each with n = 15 participants, to evaluate the mean difference in performance scores between 8-year-old and 10-year-old children. The prediction is that the older children will have higher scores. The sample mean for the older children is five points higher than the mean for the younger children and the pooled variance for the two samples is 30. For a one- tailed...
Most questions answered within 3 hours.
-
Two concentric current loops lie in the same plane. The smaller
loop has a radius of...
asked 13 minutes ago -
1)Which of the following is an
important difference between qualified and nonqualified retirement
plans?
a. Qualified...
asked 25 minutes ago -
What's the streaming business's problem on the
horizon?
asked 1 hour ago -
I need help with writing the conclusion for this online lab
report
Abstract
By testing the...
asked 1 hour ago -
For the reaction 1N2+3H2-----> 2NH3, would the reaction rate
trend be: delta[NH3]/ delta t = -2...
asked 2 hours ago -
Within your current/past organization, identify a problem/issue
and format a design to address same. You may...
asked 1 hour ago -
A sock stuck to the side of a clothes-dryer barrel has a
centripetal acceleration of 24...
asked 2 hours ago -
A perfect gas undergoes an isentropic process such that its
volume doubles. If the ratio of...
asked 3 hours ago -
list the elements in groups 3A to 6A in the same order as in the
periodic...
asked 3 hours ago -
Estimating effect size. Peng and Chen (2014)
evaluated effect size estimates for various tests. In their...
asked 3 hours ago -
Write a script in MySQL that creates and calls a stored
procedure name test. This procedure...
asked 3 hours ago -
If we test the following: H0: μ = 17
vs. H1: μ ≠ 17 and the...
asked 3 hours ago