Homework Answers
Answer)
We reject null hypothesis when p-value is less than given significance level
Here neither the p-value nor the significance level is mentioned
So, it is impossible to make a decision about Ho without more info
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Question 3 5 pts A researcher selects a sample from a population with a mean of...
A sample of n = 25 scores produces a t statistic of t = 2.062. If...
A sample of n = 25 scores produces a t statistic of t = 2.062. If the researcher is using a two-tailed test, which of the following is the correct statistical decision The researcher can reject the null hypothesis with = .05 but not with = .01 The researcher can reject the null hypothesis with either = .05 or = .01 The researcher must fail to reject the null hypothesis with either = .05 or...
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 sample of n = 25 scores produces a t statistic of t = -2.062. If...
A sample of n = 25 scores produces a t statistic of t = -2.062. If the researcher is using a two-tailed test, which of the following is the correct statistical decision? Group of answer choices: A. The researcher can reject the null hypothesis with alpha = .05 but not with alpha = .01. B. The researcher must fail to reject the null hypothesis with either alpha = .05 or alpha = .01. C. It is impossible to make a...
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 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....
A researcher obtains t = 2.01 for a repeated-measures study using a sample of n =...
A researcher obtains t = 2.01 for a repeated-measures study using a sample of n = 30 participants. Based on this t value, what is the correct decision for a two-tailed test? A. Fail to reject the null hypothesis with either α = .05 or α = .01 B. Reject the null hypothesis with α = .05 but fail to reject with α = .01 C. Fail to reject the null hypothesis with α = .05 but reject with α...
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...
A researcher selects a sample and administers a treatment to the individuals in the sample. If...
A researcher selects a sample and administers a treatment to the individuals in the sample. If the sample is used for a hypothesis test, what does the alternative hypothesis (H1) say about the treatment? Options: a. The treatment adds a constant to each score. b. The treatment causes a change in the scores. c. The treatment has no effect on the scores. d. The treatment multiplies each score by a constant.
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
A researcher is testing the hypothesis that consuming a sports drink during exercise improves endurance. A...
A researcher is testing the hypothesis that consuming a sports drink during exercise improves endurance. A sample of n = 36 male college students is obtained and each student is given a series of three endurance tasks and asked to consume 4 ounces of the drink during each break between tasks. The overall endurance score for this sample is M = 85. For the general population of male college students, without any sports drink, the scores for this task average...
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...
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...
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
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