An article reported that for a sample of 42 kitchens with gas cooking appliances monitored during a one-week period, the sample mean CO2 level(ppm) was 654.16, and the sample standard deviation was 163.7.(a) Calculate and interpret a 95% (two-sided) confidence interval for true average CO2 level in the population of all homes from whichthe sample was selected. (Round your answers to two decimal places.).604.65703.67✓) ppmInterpret the resulting interval.We are 95% confident that this interval contains the true population mean.O We are 95% confident that the true population mean lies above this interval.We are 95% confident that this interval does not contain the true population mean.O We are 95% confident that the true population mean lies below this interval.(b) Suppose the investigators had made a rough guess of 177 for the value of s before collecting data. What sample size would benecessary to obtain an interval width of 41 ppm for a confidence level of 95%? (Round your answer up to the nearest whole number.)192xkitchens

From the provided information,Standard deviation (s) = 163.7Width of interval (2E) = 41Confidence…

Answered: An article reported that for a sample…

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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Answer question 5
Question 2: A student safety advocacy group believes that drivers are speeding down Manhattan College Blvd. To prove their point, they wish to college vehicle speed data. Previous research has shown that the standard deviation of vehicle speeds on this functional class of roads is 7.00 mph. A. How many vehicles will the group need to sample to determine the 50h percentile speed if they wish to be 95.5% confident in their results plus or minus 3.00 mph? B. How does the 50th percentile required sample size change if we are concerned about the 85th percentile? C. How does the 50h percentile required sample change if we want the results to be accurate to plus or minus 1.5 mph?
Question 9: compute a 95% confidence interval for the average blood pressure range of any individual that will take the blood pressure medication.
Please answer question 6.3
3.3.15 Use z scores to compare the given values. Based on sample data, newborn males have weights with a mean of 3293.7 g and a standard deviation of 551.3 g. Newborn females have weights with a mean of 3000.6 g and a standard deviation of 590.5 g Who has the weight that is more extreme relative to the group from which they came; a male who weighs 1700 g or a female who weighs 1700 g? V has the weight that is more extreme. Since the z score for the male is z= and the z score for the female isz= the (Round to two decimal places.)
Use z scores to compare the given values. The tallest living man at one time had a height of 238 cm. The shortest living man at that time had a height of 142.4 cm. Heights of men at that time had a mean of 175.45 cm and a standard deviation of 5.59 cm. Which of these two men had the height that was more extreme? ... Since the z score for the tallest man is z = 0 and the z score for the shortest man is z = the man had the height that was Im- more extreme. (Round to two decimal places.) shortest tallest
A demographics researcher claims that the mean household income in a recent year is the same in Ada County, Idaho, and Cameron Parish, Louisiana. In Ada County, a sample of 18 residents has a mean household income of $58,300 and a standard deviation of $9,000. In Cameron Parish, a sample of 20 residents has a mean household income of $56,600 and a standard deviation of $15,600. At α=0.10, can you reject the demographics researcher’s claim. Assume the population variances are not equal. a) Null and Alternative Hypothesis b) Determine the critical value using the t-table c) Determine the rejection region d) Calculate test statistic e) Accept or reject the null hypothesis
Question 19 Provide an appropriate response. A radio station claims that the amount of advertising per hour of broadcast time has an average of 13 minutes and a standard deviation equal to 2.3 minutes. You listen to the radio station for 1 hour, at a randomly selected time, and carefully observe that the amount of advertising time is equal to 11 minutes. Calculate the z-score for this amount of advertising time. O z= 0.67 O z= -0.67 z= 0.87 O z= -0.87 A Click Submit to complete this assessment. < Question 19 of 19 Save and Submit 5:33 PM arch 3/25/2021 PrtScn Home 19 End VI0 PgUp PoDn K
You wish to test the following claim (HaHa) at a significance level of 0.10. Ho:μ=80.1Ho:μ=80.1 Ha:μ<80.1Ha:μ<80.1 You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=11n=11 with mean M=70.3M=70.3 and a standard deviation of SD=7.7SD=7.7. The test statistic is -4.221 What is the p-value for this sample?
The next six questions refer to the following scenario: A random sample of 25 students were asked to self-identify as "statistics-lovers" or "statistics-adorers." 16 students self-identified as "lovers" and 9 students as "adorers." Below table summarizes the mean of a statistics test and standard deviation that was given after the self-identification. Test the following hypothesis at alpha=5% (0.05). HO: Mean Statistics Lovers = Mean Statistics Adorers HA: Mean Statistics Lovers Mean Statistics Adorers You can assume equal variance.
You wish to test the following claim (HaHa) at a significance level of α=0.01α=0.01. Ho:μ=81.9 Ha:μ≠81.9You believe the population is normally distributed, but you do not know the standard deviation. You obtain a sample of size n=12n=12 with mean M=72.6M=72.6 and a standard deviation of SD=7.5SD=7.5.What is the p-value for this sample? (Report answer accurate to four decimal places.)p-value = ______The p-value is... A.) less than (or equal to) αα B.) greater than α This p-value leads to a decision to... A.) reject the null B.) accept the null C.) fail to reject the null As such, the final conclusion is that... A.) There is sufficient evidence to warrant rejection of the claim that the population mean is not equal to 81.9. B.) There is not sufficient evidence to warrant rejection of the claim that the population mean is not equal to 81.9. C.) The sample data support the claim that the population mean is not equal to 81.9. D.) There is not sufficient sample evidence to…
Use the following information for questions 3 and 4. A study of class lengths at two schools was done using independent samples. 31 classes were chosen from each. The first school had a mean length of 50.1 minutes and a standard deviation of 1.6 minutes. The second school had a mean length of 48.9 and a standard deviation of 2.2 minutes. We want to determine at α = 0.01 if the means are different. Assume all test conditions are satisfied. What are the null and alternate hypotheses (write in equation/inequality form)?

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