Hypothesis test results:μ: Mean of variableHo - H=2.8HA >2.8VariableLengthSample Mean3.35627Std. Err. DF0.293055 399T-StatP-value1.898176 0.0292 stKA data set includes data from 400 random tornadoes. The display from technology available below results from using the tornado lengths (miles) to test theclaim that the mean tornado length is greater than 2.8 miles. Use a 0.05 significance level. Identify the null and alternative hypotheses, test statistic, P-value,and state the final conclusion that addresses the original claim.iClick the icon to view the display from technology.Identify the test statistic.(Round to two decimal places as needed.).Identify the P-value.(Round to three decimal places as needed.)State the final conclusion that addresses the original claim.RejectHo. There issufficient evidence to support the claim that the mean tornado length is greater than 2.8 miles

given data n= 400claim : μ > 2.8α= 0.05

Answered: K A data set includes data from 400…

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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Use 0.05 significance level, test the claim that at least one of the mean hurricane intensities is different from others. Fill out the one way ANOVA table to complete the hypothesis test.
A random sample of 319 front-seat occupants involved in head-on collisions in a certain region resulted in 95 who sustained no injuries. We wish to use this sample data to test whether the true proportion of uninjured occupants in head-on collisions exceeds 0.25 or not. What would your conclusions be for this test of hypothesis, given a 5% significance level?
A rods manufacturer makes rods with a length that is supposed to be 16 inches. A quality control technician sampled 13 rods and found that the sample mean length was 16.07 inches and the sample standard deviation was 0.22 inches. The technician claims that the mean rod length is more than 16 inches. What type of hypothesis test should be performed? What is the test statistic? What is the number of degrees of freedom? Does sufficient evidence exist at the α=0.1 significance level to support the technician's claim?
Listed below are attribute ratings of males by females who participated in speeddating events. Use a 0.05 significance level to test the claim that females in thedifferent age brackets give attribute ratings with the same mean. Does ageappear to be a factor in the female attribute ratings? (Write the null andalternative hypothesis in symbols, find the critical value and test statistics,make a decision, and write a conclusion based on your results and answer thequestion above.)Age 20-22 38 42 30.0 39 47 43 33 31 32 28Age 23-26 39 31 36.0 35 41 45 36 23 36 20Age 27-29 36 42 35.5 27 37 34 22 47 36 32
At the 0.05 significance level, can we conclude that the mean amount spent has increased? Follow the five step hypothesis testing procedure.
A pipes manufacturer makes pipes with a length that is supposed to be 19 inches. A quality control technician sampled 36 pipes and found that the sample mean length was 19.03 inches and the sample standard deviation was 0.17 inches. The technician claims that the mean pipe length is not 19 inches. What type of hypothesis test should be performed? What is the test statistic? What is the number of degrees of freedom? Does sufficient evidence exist at the α=0.1 significance level to support the technician's claim?
Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that σ is known to be 121.2 lb, use a 0.10 significance level to test the claim that the population mean of all such employees weights is less than 200 lb.
is there evidence that the average infant mortality rate increases with teen birth rate? assume that the significance level is 0.05. i. state the null and alternative hypothesis. ii. should we reject or fail to reject the null? iii. justify using the rejection region
A rods manufacturer makes rods with a length that is supposed to be 10 inches. A quality control technician sampled 30 rods and found that the sample mean length was 10.05 inches and the sample standard deviation was 0.14 inches. The technician claims that the mean rod length is less than 10 inches. What type of hypothesis test should be performed? What is the test statistic? What is the number of degrees of freedom? Does sufficient evidence exist at the α=0.01 significance level to support the technician's claim?yes or no
Identify the null hypothesis, alternative hypothesis, test statistic, P -value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that a is known to be 121.2 lb, use a 0.10 significance level to test the claim that the population mean of all such employees weights is less than 200 lb.
Is there a larger proportion of days with precipitation in Dublin Ireland than New York City? In recent years Dublin experienced 129 days of precipitation of 365 days. New York City experienced 119 days of precipitation of 365 days. Use a 0.05 significance level to determine if Dublin has a significantly larger proportion. What is your decision for the hypothesis test? What is the z-stat and p-value.
Can you help me solve these 3 questions using Statcrunch? please and thank you! Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. 23) The health of employees is monitored by periodically weighing them in. A sample of 54 employees has a mean weight of 183.9 lb. Assuming that CJ is known to be 121.2 lb, use a 0.10 significance level to test the claim that the population mean of all such employees weights is less than 200 lb. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Do one of the following, as appropriate: (a) Find the critical value Za/2- (b) find the critical value ta/2- (c) state that neither the normal nor the t distribution applies. 24) 99%; n = 17; CJ is unknown; population appears to be normally distributed. A) Za./2 = 2.583 B) Za/2 = 2.567 C) ta/2 = 2.898 D) ta./2 = 2.921 Use the given degree of…

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