For which of the following is a t-test appropriate for performing a hypothesis test?Select the correct answer below:OA convenient sample of 23 individuals is taken from the residents of a city with approximately normallydistributed commute times. The sample mean is 19 minutes and the sample standard deviation is 2 minutes.OA population is used to obtain a sample mean of 53 and a sample standard deviation of 7 based on a convenientsample of size 19.OA sample mean of 70 and sample standard deviation of 7 are obtained using a simple random sample of size 19from a normally distributed population.OA sample mean of 194 pages and a standard deviation of 37 pages are obtained using a simple random sampleof 30 books from a public library having approximately normally distributed numbers of pages. The populationstandard deviation is 31.4 pages.

A t test if used in hypothesis test under following conditionsWe use t test if the sample size is…

Answered: For which of the following is a t-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

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A sample mean, sample size, and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the 10% significance level. x=26 n=20, σ=6 H0: μ=24 Ha: μ>24 The test statistic is z=___________ (Round to two decimal places as needed.) Identify the critical value(s). Select the correct choice below and fill in the answer box within your choice. (Round to two decimal places as needed.) A. The critical values are ±zα/2=±______________ B. The critical value is −zα=_____________ C. The critical value is zα=___________ _____ (Reject, do not reject) the null hypothesis. The data ____________________(do not provide, provide sufficient) evidence to conclude that the mean is (less than 40, equal to 40, not equal to 40, greater than 40)
A mechanic a brand of automobile tire that has a expectancy that is normally distributedwith a mean of 28,000 miles and a standard deviation of 2100 milesHe wants to give a guarantee for free replacement of tires that don't wear well How should he word his guarantee is willing to replace approximately 10% of the ?
five samples of 15 minerals are taken from a population. The sample means for hardness of the minerals are 6.5, seven, seven, 6.5, and six. The standard deviation for the mineral is .745. Find the meaning of the sample means and the standard deviation of the sample means for the hardness
select which of the three is correct
A sample mean, sample standard deviation, and sample size are given. Perform the required hypothesis test about the mean, μ, of the normal population from which the sample was drawn. H0: μ ≤ 2.85, Ha: μ > 2.85, x = 3.26, s = 0.55, n = 9, α = 0.05
Plz help asap 41
14 A study was done using a treatment group and a placebo group. The results are shown in the table. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. Use a n 0.10 significance level for both parts. X a. Test the claim that the two samples are from populations with the same mean. What are the null and alternative hypotheses? OA. Ho: H₁ H₂ H₁: H₁ H₂ OC. Ho: H=H2 H₁: H₁ H₂ The test statistic, t, is (Round to two decimal places as needed.) The P-value is. (Round to three decimal places as needed.) State the conclusion for e test. GELER OB. Ho: H1 H2 H₁: Hy > H₂ Treatment Placebo Hy 1/2 OD. Ho: H₁ H₂ H₁: Hy
The state of CT claims that the average time on death row is 15 years. A random survey of 75 death row inmates revealed that the average length of time on death row is 16.6 years with a standard deviation of 5.8 years. Conduct a hypothesis to test the state of CT's claim. t test mean two tail test p value = ____________ What is the decision?
A new material will replace the old material only if there is significant evidence that the mean strength of the new material is more than 2 units higher than the mean strength of the old material. Sample from new material: mean is 98.064 , SD is 5.6 and sample size is 13 Sample from old material: mean is 95.282 , SD is 5.8 and sample size is 78 We do not know population standard deviations. Consider the test ?0:????−????=2H0:μnew−μold=2 vs. ?0:????−????>2H0:μnew−μold>2 What is the p-value? (Hint: best to use software, or else the Desmos Calculator for the 2 sample T and Z test) Give as a decimal between 0 and 1 accurate to at least 4 decimal places.
A set of exam scores is normally distributed with a mean = 82 and standard deviation = 9. Use the Empirical Rule to complete the following sentences. 68% of the scores are between and 95% of the scores are between and 99.7% of the scores are between and
Given in the table are the BMI statistics for random samples of men and women. Assume that the two samples are independent simple random samples selected from normally distributed populations, and do not assume that the population standard deviations are equal. Complete parts (a) and (b) below. a. Use a 0.05 significance level, and test the claim that males and females have the same mean body mass index (BMI). What are the null and alternative hypotheses? OA. Ho: H₁ H₂ H₁ H₁ H₂ OC. Ho: H₁ H₂ H₁: H₁ H₂ The test statistic, t, is The P-value is . (Round to two decimal places as needed.) (Round to three decimal places as needed.) State the conclusion for the test. OB. Ho: H₁ H₂ H₁: H₁ H₂ OD. Ho: H₁ = H₂ H₁: H1 H₂ O A. Fail to reject the null hypothesis. There is not sufficient evidence to warrant rejection of the claim that men and women have the same mean BMI. O B. Fail to reject the null hypothesis. There is sufficient evidence to warrant rejection of the claim that men and women have…

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