what is the zobserved value for the hypothesis test? Experiment 1: You believe that caffeine can improve the capacity of short-term memory (STM). It iswidely known that STM capacity 7 items (m=7)on average with a standard deviation of 2 items (s=2).You randomly sampled n=8 participants and have then drink a large quantity of coffee. Fifteen minuteslater you administer a STM test to each participant and measure the number of items remembered.The data are shown below. Use these data to answer the following questions. Excel should be used toobtain the sample mean, standard deviation and standard error.Perform a 2-tailed z-test with a=0.05 to determine if caffeine influences memory.NumberParticipantof items1931746.5,670

It was stated that I believe that caffeine can improve the capacity of short-term memory (STM). It…

Answered: what is the zobserved value for the…

Math

Statistics

what is the zobserved value for the hypothesis test?

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: What do you need to be able to perform a hypothesis test?

A: Hypothesis testing: Hypothesis testing is the procedure of testing a claim about the population…

Q: What are appropriate conditions to conduct a hypothesis test?

A: Hypotheses: Hypotheses is the plural form for hypothesis. Hypothesis is a statement about the…

Q: In statistics why can't we accept the null hypothesis?

A: To perform a hypothesis test, it is first necessary to define an assumed set of conditions…

Q: How on earth do I make the problem for the Hypothesis test?

A: A test of a statistical hypothesis H is a rule or procedure of deciding whether to reject or accept…

Q: Most customers like iced coffee more than hot coffee. Alternative hypothesis Null…

A: For the given claim we want to know the null and alternative hypothesis.

Q: What is the Null Hypothesis? What is the Alternative Hypothesis? explain/discuss your answer

A: Dependent Variable Foreign Direct Investment Independent Variable Political stability, corruption…

Q: I want to find out whether students believe coffee helps them with their academic success.I asked 20…

A: There are two samples available. First sample is of the students who believe that drinking coffee…

Q: What does it mean to find significant results from a hypothesis test?

A: Two types of hypothesis : 1 : null hypothesis 2 : alternative hypothesis

Q: Be able to determine the null hypothesis from a description of an experiment?

A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made on…

Q: Describe an example of a type-II error in hypothesis testing.

A: Type-II error : In statistical hypothesis testing, a type II error is a situation wherein a…

Q: e p value used to reach a conclusion in a hypothesis testing pro

A: The p-value is a conditional probability of getting a test statistic as extreme or more extreme than…

Q: Are there examples of hypothesis tests that you have found in other research or even in everyday…

A: Hypothesis Tests, or Statistical Hypothesis Testing, is a method used to compare two sets of data,…

Q: Explain what a null hypothesis and an alternative hypothesis are. Why are these two hypotheses…

A: The null and alternative hypothesis are used in statistical hypothesis testing . The null hypothesis…

Q: Explain how to conclude when you would reject the null hypothesis based on a p-value. Give a numeric…

A: We know that when p-value is less than the significance level than reject the null hypothesis and…

Q: What does null hypothesis ascertain?

A: Hypothesis: Hypothesis is an assumption about the parameter of the population which will be made on…

Q: Describe the 5 elements of a hypothesis test.

A: We have to describe the 5 elements of a hypothesis test.

Q: When do we use alpha and beta in hypothesis testing?

A: Basics: Alpha is the probability of making Type I error in hypothesis test . i.e incorrectly…

Q: Why is it useful to obtain the power curve for a hypothesis test?

A: Power of a test:It is the chance or the probability of correctly rejecting the null hypothesis H0…

Q: What are the basic steps involved in any nonparametric test of hypothesis?

Q: what kind of hypothesis test is this

A: We have given that the information of two variables, the independent variable X i.e, dynamic risk…

Q: Why is the phrase “goodness of fit” used to describe the type of hypothesis test considered in this…

Q: Descibe the difference between the null hypothesis and alternative hypothesis. How do we denote each…

A: In this question we have to explain the difference between null and alternative hypothesis and also…

Q: what is the alternative and null hypothesis for this question

A: Given that To conduct hypothesis for the relationship between sexual gender and preference for the…

Q: If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected at the 0.01…

A: Statement: " If a null hypothesis is rejected at the 0.05 level of significance, it must be rejected…

Q: Define the Null Hypothesis and give an example

A: In statistics null hypothesis say that there is no statistical significance. It generally states…

Q: (2) If the Type II error of a hypothesis test is 0.10, what is the power of the test? Show steps.

Q: Why do we test a null hypothesis instead of a research hypothesis

A: A hypothesis, in general, is an assumptions that is yet to be proved with sufficient pieces of…

Q: If the F-statistic is close to one, what would be the decision of a hypothesis test?

A: The F-statistic is the test statistic for F-tests. In general, an F-statistic is a ratio of two…

Q: In a recent study of a random sample of 113 people, 92 reported dreaming in color. In the 1940’s,…

A: The random variable dreaming in color follows binomial distribution. The sample size is 113. The…

Q: Describe the null and alternative hypothesis. If a person is accused of a crime, and is on trial,…

A: When we select null and alternative hypothesis we choose the null hypothesis basis on our priority.…

Q: Explain the difference, in your own words, between a null hypothesis and the alternative hypothesis.…

A: Hypothesis:Hypothesis is an assumption about the parameter of the population which will be made on…

Q: Why is hypothesis testing important?

A: Hypothesis is important for decesion making in the field of statistics. For example we are trying to…

Q: What is a relevant to hypothesis testing in your daily life? This could be school life, personal…

A: Hypothesis:Hypothesis is an assumption about the parameter of the population which will be made on…

Question

what is the zobserved value for the hypothesis test?

Experiment 1: You believe that caffeine can improve the capacity of short-term memory (STM). It is
widely known that STM capacity 7 items (m=7)on average with a standard deviation of 2 items (s=2).
You randomly sampled n=8 participants and have then drink a large quantity of coffee. Fifteen minutes
later you administer a STM test to each participant and measure the number of items remembered.
The data are shown below. Use these data to answer the following questions. Excel should be used to
obtain the sample mean, standard deviation and standard error.
Perform a 2-tailed z-test with a=0.05 to determine if caffeine influences memory.
Number
Participant
of items
1
9
3
17
4
6.
5,
670

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Statistical Power and Errors$

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.

Similar questions

Describe about The power of a hypothesis test.
According to a New York Times/CBS News poll conducted during June 24-28, 2011,55% of the American adults polled said that owning a home is a very important part of the American Dream (The New York Times, June 30, 2011). Suppose this result was true for the population of all American adults in 2011. In a recent poll of 1800 American adults, 62% said that owning a home is a very important part of the American Dream. Perform a hypothesis test to determine whether it is reasonable to conclude that the percentage of all American adults who currently hold this opinion is higher than 55%. Use a 2% significance level, and use both the p- value and the critical-value approaches. Round your answers for the observed value of z and the critical value of z to two decimal places, and the p-value to four decimal places. Zobserved p-value = i Critical value = i We can conclude that the percentage of all American adults who currently hold this opinion is 55%.
Explain the step-by-step procedure for the current hypothesis test.
provide an example of hypothesis testing using the t score test
Come up with you own hypothesis testing scenario. What are examples of a null and research hypothesis? And consider what it would mean if you came up with significant results?
Detemine the P-value for this hypothesis test.
What is hypothesis testing? Why do we use hypothesis testing?
Which can be used for hypothesis testing for matched data pairs? I test Sign test Signed-rank test O All of the above
Explain briefly when to use the Z-test, t-test and F-test in the hypotheses testing.
Recognize when to use a hypothesis test?
Which of the below-mentioned hypotheses is assumed to be true while we perform a hypothesis test?
In performing a hypothesis test, one should decide whether to reject or not reject the null hypothesis before summarizing the results. True or false. Explain.