Historically, the average arrival rate at an airport is 195 flights per hour. The population standard deviation is known and isequal to 13. Airport management would like to increase arrivals so they implemented a new traffic control procedure. Afterimplementing the new procedure, a sample of arrivals during 30 days was collected and showed a mean arrival rate of 200flights per hour. Using a = 0.1, does the sample show that the new procedure is effective?(a) State the null and alternative hypothesesa. Ho: ≥195Η: μ < 195b. Ho: ≥ 200H₁: <200c. Ho: HS 195H₁: > 195d. Ho: μ= 195e.H₁:195Ho: ≤200H₁: >200(b) Calculate the test statisticofa. -2.11b. 197.26c. 2.11d. 117.84

To address this query, we'll follow a two-step process, first defining the correct hypotheses, and…

Answered: Historically, the average arrival rate…

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 researcher is conducting a study to determine the mean trough dosage of medication for a population. Assume a previous study was conducted for the same medication and the mean trough dose was found to be 300 mg with a standard deviation of 30 mg. If the researcher wants to be 95% confident the true mean trough dosage of the medication is within 10 mg of the true mean trough dosage, what sample size is needed?
A plumbing company has found that the standard deviation for the average length of time, in minutes, for installing a bathtub is 30 minutes. The plumbing company advertises that a bathtub installation takes no more than 2 hours. The owner of the company hired a statistician to test the company's claim. The statistician randomly selected a sample of 40 bath- tub installations. The sample yielded i = 150 minutes and s = 35 minutes. State the decision rule at the 10% significance level. It cannot be determined from the information given. Reject Ho if T.S. > 1.645. Reject Ho if T.S. > 1.303. O Reject Ho if T.S. > 1.282 II
Peak expiratory flow (PEF) is a measure of a patient’s ability to expel air from the lungs. Patients with asthma or other respiratory conditions often have restricted PEF. The mean PEF for children free of asthma is 306. An investigator wants to test whether children with chronic bronchitis have restricted PEF. A sample of 50 children with chronic bronchitis is studied, and their mean PEF is 251 with a standard deviation of 71. When you run the appropriate test at a = 0.05, the appropriate conclusion to whether there statistical evidence of a lower mean PEF in children with chronic bronchitis is?
Normal blood sugar levels are less than 100 mg/dL after fasting for at least eight hours. A sample of 34 seniors were found to have a mean glucose level of 109 mg/dL and a standard deviation of 20 mg/dL. Using a 1% alpha level, a researcher wants to determine if the seniors' glucose level is significantly higher than normal.
the number of eggs female house flies lay during a lifetime is normally distributed what a mean of 800 eggs and a standard deviation of 100. random samples of size 15 are drawn from this population and the mean of each sample is determined. what is the mean? what is the standard error?
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A test had 12 items. A new version of a test was made by adding a set of 12 items which resembles the original 12-item test. The new test having 24-items was administered a group of students. The mean and the standard deviation of the new 24-item test scores were 18 and 6, respectively. The difference score between the original 12-item test and the new set of 12 items was calculated. The standard deviation of the difference scores was 3. Estimate reliability. Question 24 For the above question where you calculated reliability of the 24-item test, what test assumption was needed? Group of answer choices NOTA essentially parallel essential tau-equivalence
According to the National Sleep Foundation, all children should get 10 hours of sleep each right. In a survey of 56 parents, it was found that their children had a sample mean of 8.9 hours, with a sample standard deviation of 3,2 hours. Does this evidence suggest that children are sleeping less hours than the amount they should be getting (10 hours)? Use a=0.01 level of significance and any approach you chose to test the mean
The average amount of rainfall during the summer months for the midwestern part of the US is more than 13 inches. Rainfall amounts are generally normally distributed. A researcher selects a random sample of 15 cities in the Midwest and finds that the average amount of summer rainfall is 11.42 inches. The standard deviation of the sample is 2.13 inches. Using α = 0.05, can it be concluded that the mean rainfall in the Midwest is more than 13 inches? What is the decision for this hypothesis test? The average amount of rainfall during the summer months for the midwestern part of the US is more than 13 inches. Rainfall amounts are generally normally distributed. A researcher selects a random sample of 15 cities in the Midwest and finds that the average amount of summer rainfall is 11.42 inches. The standard deviation of the sample is 2.13 inches. Using α = 0.05, can it be concluded that the mean rainfall in the Midwest is more than 13 inches? What is the decision for this hypothesis test?…
Leaf length of a type of flower, in cm, are Normally distributed. It is further given that 0.13 of these flowers' leaf lenght are shorter than 6 cm and 0.03 are longer than 9 cm. Find the mean and the standard deviation of the leaf length of these type of flowers.
For a random sample of 90 overweight men, the mean number of pounds that they were overweight was 35. The standard deviation of the population was 3.5 pounds. Find the best point estimate of the number of excess pounds that they weighed.
The breaking strengths of cables produced by a certain manufacturer have historically had a mean of 1750 pounds and a standard deviation of 60 pounds. The company believes that, due to an improvement in the manufacturing process, the mean breaking strength, u, of the cables is now greater than 1750 pounds. To see if this is the case, 50 newly manufactured cables are randomly chosen and tested, and their mean breaking strength is found to be 1770 pounds. Can we support, at the 0.10 level of significance, the claim that the population mean breaking strength of the newly-manufactured cables is greater than 1750 pounds? Assume that the population standard deviation has not changed. Perform a one-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis H and the alternative hypothesis H. Ho : H :0 ロロ (b) Determine the…

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