zyBooks -Airline customer sampleIdentify the population parameter.window seat196Observations350PickConfidence Level0.95Critical value1.64What condition for using a z-distribution is met?test statistic (z)2.24p-value0.0124PickWhat is the level of significance? Ex: 0.12What is the null hypothesis Ho?PickWhat is the alternative hypothesis Ha? PickShould Ho be rejected or does Họ fail to be rejected?PickWhat conclusion can be drawn from the data?

Answered: Airline customer sample Identify the…

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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Two groups were selected for an experiment. The sample data is reported: Group A Group B Sample Mean Spending/day ($) 170 150 Sample Standard deviation ($) 10 5 # of Females 9 7 Sample Size 36 42 a. Set up a 99% confidence interval for the mean difference in spending between the two groups. b. At the 10% level test the alternate hypothesis that group B has lower spending level than Group A.
Degrees of Freedom a. What is the number of degrees of freedom that should be used for finding the critical value b. Find the critical value ta/2 corresponding to a 95% confidence level. C. Give a brief general description of the number of degrees of freedom.
8. Form a 90% confidence interval on the difference in means. group wine sample std dev 2.0 mean 10 17.4 no alcohol 10 12.4 2.0
An electrician wants to know whether batteries made by two manufacturers have significantly different voltages. The voltage of 131 batteries from each manufacturer were measured. The population standard deviations of the voltage for each manufacturer are known. The results are summarized in the following table. Manufacturer Sample mean voltage (millivolts) Population standard deviat A 116 3 115 4 What type of hypothesis test should be performed? Right-tailed z-test v What is the test statistic? Ex: 0.12 Does sufficient evidence exist to support the claim that the voltage of the batteries made by the two manufacturers is different at the a = 0.01 significance level? Select v
??
Two types of flares are tested and their burning times are recorded. The summary statistics are given below. Brand X Brand Y n = 35 n = 40 x= 19.4 min x= 15.1 min s= 1.4 min s= 0.8 min Construct a 95% confidence interval for the differences between the mean burning time of the brand X flare and the mean burning time of the brand Y flare.
Obtain the summary statistics for LWT graph and AGE graph. Construct a 95% confidence interval estimate for moms mean age.
StatKey Confidence Interval for a Mean, Median, Std. Dev. Custom Dataset Show Data Table Edit Data Upload File Change Column(s) Generate 1 Sample Generate 10 Samples Generate 100 Samples Generate 1000 Samples Reset Plot Bootstrap Dotplot of Original Sample Mean - n = 23, mean = 65057.304 median = 64625, stdev = 11542.583 Left Tail Two-Tail Right Tail samples - 1000 mean 65050.653 20 std. error 2365.388 50 15 10 60000 70000 65057.304 50000 80000 90000 30 Bootstrap Sample Show Data Table 0.050 0.900 0.050 71528.783 n = 23, mean = median = 68804, stdev = 14634.15 %3D || 20 15 10 10 5 ::: 0. 66000 65050.653 68000 A 70000 72000 58000 60000 62000 64000 50000 60000 700 80000 90000 71528.783 61177.326 69178.783 40 20
Find the value for each ta/2 Prompts Submitted Answers n = 18 for the 99% confidence interval for the Choose a match mean. n = 10 for the 90% confidence interval for the Choose a match mean. n = 15 for the 98% confidence interval for the Choose a match mean.
The degenerative disease osteoarthritis most frequently affects weight-bearing joints such as the knee. Stance duration (ms) was measured in separate samples of younger and older adults. younger: n=22 mean=801 s=117 older: n=16 mean=780 s=81 Test the claim that the true average stance is different between younger and older adults. Let population 1= younger population 2= older a. Construct a 95% confidence interval estimate, what is the margin of error? Use 2 decimal places.
Construct a 90% confidence interval to estimate the population mean using the data below. What assumptions need to be made about this population? X̄=37 s=9.1 n=25 **Round to two decimal places as needed.**
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