(a) Test the researcher’s claim at 4% level of significance.(b) Find the p-value for the test in (a).(c) What is the assumption needed for the test in (a)? A researcher is testing the effects of plant food on plant growth. Nine plants have beengiven the plant food and another nine plants have not been given the plant food. Afterthe period of eight weeks, the sample mean height of plants that given the plant foodand not given the plant food is 16 and 14 inches respectively. Based on the past researchresult, the standard deviation of the height of plants that given the plant food and notgiven the plant food is known to be 2.5 and 1.5 inches respectively. The researcherthinks the food makes the plants grow taller.(a) Test the researcher's claim at 4% level of significance.(b) Find the p-value for the test in (a).(c) What is the assumption needed for the test in (a)?

Let be the mean height of plants with plant food and be the mean height of plants without plant…

Answered: A researcher is testing the effects of…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Lindsey thinks a certain potato chip maker is putting fewer chips in their regular bags of chips. From a random sample of 17 bags of potato chips she calculated a P value of 0.135 for the sample. (a) At a 5% level of significance, is there evidence that Lindsey is correct? (Type: Yes or No): (b) At a 10% level of significance, is there evidence that she is correct? (Type: Yes or No): (c) In a statistical test of hypotheses, we say that the data are statistically significant at level a if O A. the P- value is less than a. OB. a is small. OC. the P- value is larger than a. D. a = 0.05.
Let p denote the proportion of students at a particular university that use the fitness center on campus on a regular basis. For a large-sample z test of H0: p = 0.5 versus Ha: p > 0.5, find the P-value associated with each of the given values of the test statistic. (Enter your answers to four decimal places.) (a) 1.70 (b) 0.28 (c) 1.93 (d) 2.45 (e) −0.13
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Standardized test scores For his Statistics class experi-ment, researcher J. Gilbert decided to study how parents’ income affects children’s performance on standardizedtests like the SAT. He proposed to collect informationfrom a random sample of test takers and examine therelationship between parental income and SAT score.a) Is this an experiment? If not, what kind of study is it?b) If there is relationship between parental incomeand SAT score, why can’t we conclude that differencesin score are caused by differences in parentalincome?
find p value and its meaning please A survey of 1000 adults from a certain region asked, "If purchasing a used car made certain upgrades or features more affordable, what would be your preferred luxury upgrade?" The results indicated that 58% of the females and 51% of the males answered window tinting. The sample sizes of males and females were not provided. Suppose that of 600 females, 348 reported window tinting as their preferred luxury upgrade of choice, while of 400 males, 204 reported window tinting as their preferred luxury upgrade of choice. Complete parts (a) through (d) below. a. Is there evidence of a difference between males and females in the proportion who said they prefer window tinting as a luxury upgrade at the 0.05 level of significance? State the null and alternative hypotheses, where π1 is the population proportion of females who said they prefer window tinting as a luxury upgrade and π2 is the population proportion of males who said…
When using an independent samples t-test, the author of a journal article reported that t(30) = 3.60, p < .05. Should the researcher reject the null or fail to reject the null?
Please help with (D)
(b) Compute the P-value of the test statistic. Round the answer to at least four decimal places. P-value =
Imagine you are doing a Related-Samples t-test, and you are on Step Four of the hypothesis test. The study you are doing is testing whether there’s a significant difference between the anxiety of people before and after a final exam. The APA sentence is t(28) = 3.45, p < .05, d = 1.05. What is the correct set of conclusions that goes with this APA sentence? Group of answer choices Reject the H0, conclude that there IS a difference in anxiety, conclude based on effect size that the difference is small. Fail to Reject the H0, conclude that there IS a difference in anxiety. Reject the H0, conclude that there IS NOT a difference in anxiety, conclude based on effect size that the difference is small. Fail to Reject the H0, conclude that there IS NOT a difference in anxiety. Reject the H0, conclude that there IS a difference in anxiety, conclude based on effect size that the difference is large.
Dan thinks a certain potato chip maker is putting fewer chips in their regular bags of chips. From a random sample of 11 bags of potato chips he calculated a P value of 0.086 for the sample. (a) At a 5% level of significance, is there evidence that Dan is correct? (Type: Yes or No): ... (b) At a 10% level of significance, is there evidence that he is correct? (Type: Yes or No): ... (C) In a statistical test of hypotheses, we say that the data are statistically significant at level a if O A. a = 0.05. O B. a is small. C. the P- value is larger than a. D. the P- value is less than a.
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How do I tell if I have a one-sample t-test or an indepenent-samples t-test in the following situation? I have a group that has received a financial benefit and were chosen to rate their happiness after receiving that benefit. However, all members, those in the sample and those in the total group received the same beneifit. Do I have two groups and need an independent samples t-test or do I have one group measured against the mean?

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