a. state the null and alternative hypothesis b. calculate test statistic c. what are the df? what is/ are the critical values? A psychiatrist wants to test a drug claimed to decrease anxiety episodes in depressedpatients. A group of n = 50 subjects participates in her program and their anxietyepisodes are counted. The sample produces M = 22.78, s 5.63. It is known thatthe population value for this measure is m 25. Test the hypothesis that theprogram decreases anxiety episodes. Test with a = .01.%D%3D

a) From the given information, Sample size n =50 the Sample mean, M=22.78 the Sample standard…

Answered: a. state the null and alternative…

a. state the null and alternative hypothesis b. calculate test statistic c. what are the df? what is/ are the critical values?

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: 4. If x = 31, x2 = 28, s= 2.13, ni= 6, n2=7 then t=_ В. 3.68 %3D А. 3.71 С. 3.70 D. 3.69 5. If i =…

A: Dear Student, As per the guidelines I can solve only the 3 subparts. Kindly repost remaining parts.

Q: In case of hypothesis testing in places where population variances are unknown and sample size is…

A: Given : n1 and n2≥ 30 population variances are unknown

Q: If sample mean is 99 and population mean is 100 and S.E.(7) =0.4 then the value of test statistic z…

Q: The following data represents the level of health and the level of education for a random sample of…

A: From given data we have Education Excellent Good Fair Poor Not a H.S. graduate 149 152 85…

Q: B. Identify the test statistic. ____ b2. Identify the P-value. ___ C. State the final…

A: The observed value (Oi) is: Born in Jan Feb Mar Apr May Jun Jul Aug Sep Oct…

Q: In a study that is looking at the proportion of statistics majors that are male and female at a…

A: A study is done to look at the proportion of male and female of statistics majors in a particular…

Q: A store manager wants to see if the of sales for an store. The manager observes the number of items…

A: Since, you have posted a question with multiple sub-parts, we will solve the first three complete…

Q: Suppose that, on average, U.S. adults get fast food 10 times a week. In a random sample of 41…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: A statistical test result is called "statistically significant" whenever The test statistic value is…

A: We have to determine when the statistical test is said to be significant.

Q: a. Identify the null and alternative hypotheses. b. identify the test statistic c. identify the…

A: Sample size n =35 Population mean =8.953

Q: . Use a 0.05 significance level to test the claim that among couples, males speak fewer words in a…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: To test whether the mean of a population is greater than 210, the appropriate null hypothesis is…

Q: Choose the best answer for the statistical conclusion.

A: Given information: The data represents the turnaround time for 4 types of contractors and 3 types of…

Q: d) Calculate your test statistic. Write the result below, and be sure to round your final answer to…

A: we have given that n=54; ¯x=40.66 pounds; s=3.97 pounds and alpha=0.05 NOTE:- According to…

Q: Experiment refers to a categorical quantity under examination in an experiment as a possible cause…

A: Analysis of variance is a parametric test that is used to understand the relationship between the…

Q: To test whether the mean of a population is greater than 20, the appropriate null hypothesis is that…

Q: l land with the buttered side down when dropped. Identify the null and alternative hypotheses to…

A: Given that n=55 , X=21 X=buttered toast will land the buttered side down p=50% Note: According to…

Q: An author argues that more American-born baseball players have birth dates in the months immediately…

A: Given:

Q: When several dependent variables are correlated and a researcher wants a single, overall statistical…

A: Friedman's ANOVA is a non-parametric measure of the difference between more than two related groups.…

Q: 3. The power of a signi following is a true st a. The probability of a b. The probability of a c.…

Q: In order to make decision in hypothesis testing, p-value is frequently used when Select one: O a.…

A: In order to make decision in hypothesis testing, p-value is frequently used when Explanation: The P…

Q: According to a recent report, 47% of college student internships are unpaid. A recent survey of 80…

A: given data n = 80 x = 45 claim : p ≠ 0.47

Q: D) What is the negative predictive value of the home test? E)Suppose you take a BinaxNOW home test…

A: The negative predictive value (NPV) of the home test is the proportion of individuals who test…

Q: b. Reject H1

A: Critical Region: Is the region in Statistics which can say about whatever claim we define for the…

Q: In hypothesis testing, if the null hypothesis is rejected, which of the following is accepted? A.…

A: Sol

Q: Find the standardized test statistic, z, to test the hypothesis that p1 < p2. Use α = 0.10.

Q: an example of a discrete quantitative ent grade point average e spent preparing for SAT

A: A variable can be used to characterize a individual quantitative or qualitative characteristics.…

Q: It is tested by a statistical test. a. Null hypothesis b. Alternative hypothesis c. Test statistic…

A: Given that

Q: Select the statistic test that best fits each description. Number of heart attacks per blood type…

A: Introduction:A brief introduction to the various tests suggested here is given below:T-test…

Q: A The following data represent the level of health and the level of education for a random sample of…

A: From the information, given that

Q: se the correct answer below. b. The test statistic is z= c. The P-value is enter your response…

Q: It is of interest to determine if there is a significant difference in population mean IQ among…

A: IQ data from four randomly-selected students from each of the three schools is provided. Null…

Q: The null and alternate hypotheses are: He: T1 ≤ 1₂ H₂: T₂ > TT₂ A sample of 100 observations from…

A: sample size(n1)=100x1=70sample size(n2)=150x2=90significance level()=0.05The null and alternative…

Q: a. Why the ANOVA F-test for model utility is called the "global" test? b. Why would it make sense…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: D. Do you Reject or Do Not Reject the null hypothesis based on 0.05 significance level? E. What is…

A: From the given information, Population mean = 45 Sample mean = 42.5 Sample size =70 Standard…

Q: Which of the following p-values will lead us to reject the null hypothesis if the level of…

Q: Which of the following decrease(s) power in hypothesis testing? A. Increasing the sample size. B.…

A: the correct answer is B that is decreasing the significance level.The lower the significance level,…

Q: Data on the weights (Ib) of the contents of cans of diet soda versus the contents of cans of the…

A: Given

Q: S Click here for the Excel Data File a. Specify the competing hypotheses in order to determine…

A: Solution: Given information: n= 78 total observation k= 4 groups SSB= 19.75 Sum of square of…

Concept explainers

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.

Question

a. state the null and alternative hypothesis

b. calculate test statistic

c. what are the df? what is/ are the critical values?

A psychiatrist wants to test a drug claimed to decrease anxiety episodes in depressed
patients. A group of n = 50 subjects participates in her program and their anxiety
episodes are counted. The sample produces M = 22.78, s 5.63. It is known that
the population value for this measure is m 25. Test the hypothesis that the
program decreases anxiety episodes. Test with a = .01.
%D
%3D

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

$Basics of Inferential Statistics$

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

The data below show sport preference and age of participant from a random sample of members of a sports club. Is there evidence to suggest that they are related? Frequencies of Sport Preference and Age Tennis Swimming Basketball 18-25 97 86 72 26-30 91 78 54 31-40 68 72 50 Over 40 67 58 43 What can be concluded at the a = 0.10 significance level?
A. Test the claim that the contents of cans of diet soda have weights with a mean that is less than the mean for the regular soda. What are the null and alternative and hypotheses? B. What is the test statistic? (Round to two decimal places as needed.) C. What is the P-value? (Round to three decimal places as needed.) State the conclusion for the test. A. Reject the null hypothesis. There is sufficient evidence to support the claim that the cans of diet soda have mean weights that are lower than the mean weight for the regular soda.B. Fail to reject the null hypothesis. There is sufficient evidence to support the claim that the cans of diet soda have mean weights that are lower than the mean weight for the regular soda.C. Fail to reject the null hypothesis. There is not sufficient evidence to support the claim that the cans of diet soda have mean weights that are lower than the mean weight for the regular soda.D. Reject the null hypothesis. There is not sufficient evidence to support…
A hypothesis test is performed on the following where the claim is the null hypothesis Ho:p = 0.74 H :p+0.74 a.) What population parameter is being tested? a. proportion b. standard deviation C. mean d. variance b.) What type of hypothesis test is being performed? a. left-tailed b. right-tailed c. two-tailed
B. Determine the test statistic. _____ C. Determine the P-value. _____ D. State the final conclusion that addresses the original claim. (fail/ fail to reject) H0. There is (suffecient/ not suffecient) evidence to conclude that the original claim that the mean of the population of estimates is 60 seconds (is/ is not) correct. It (appears/ does not appear) that, as a group, the students are reasonably good at estimating
29
please show all work
PART d e
Express the null hypothesis and the alternative hypothesis in symbolic form. Use the correct symbol (μ or p) for the indicated parameter.The mean college professors' salary is claimed to be over $80,300.
For the independent-measures t statistic, what is the effect of increasing the difference between sample means? a. an increase in the likelihood of rejecting H0 and an increase in measures of effect size b. an increase in the likelihood of rejecting H0 and a decrease in measures of effect size c. a decrease in the likelihood of rejecting H0 and an increase in measures of effect size d. decrease in the likelihood of rejecting H0 and a decrease in measures of effect size
When we test the hypothesis that the population proportions are equal, we can use the Z test for a one-sided as well as a two-sided alternative. Select one: a. False b. True C. Not sure
You wish to test the following claim (Ha) at a significance level of a = 0.002. H.: H1 - H2 = 0 Ha:µ1 – µ2 <0 You obtain a sample of size nį = 70 with a mean of x1 from the first population. You obtain a sample of size n2 deviation of s2 = 18.7 from the second population. 85.5 and a standard deviation of s1 70 with a mean of x2 15.1 88.7 and a standard %3D *Be sure to test the variances first to determine whether or not you will need to pool.** What is the critical value for this test? (Report answer accurate to three decimal places.) critical value %3D What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = The test statistic is... O in the critical region O not in the critical region
The critical boundaries for a hypothesis test are z = +1.96 and -1.96. If the z-score for the sample data is z = 1.90, then what is the correct statistical decision? a. Fail to reject H0 b. Fail to reject H1 c. Reject H1 d. Reject H0