●The value of the test statistic is given byx²Chi-square distributionStep 1: Enter the number of degreesof freedom.Step 2: Select one queue or twoqueues.A tailtwo tailsStep 3: Enter the critical value(s).(Round to 3 decimal places.Step 4: Enter the test statistic.(Round to 3 decimal places.0.3 +0.2 +0.1+(no 1)yes0²10fifteentwenty253035 Records indicate that the average weight of adult rainbow trout in Eagle Creek is1.70 kgwith a standard deviation of0.38 kg.After years of marked oxygendepletion due to pollutants in the stream, a biologist wants to see if the standard deviation, o,of pesos has changed. The biologist measures the weights of 18randomly selected adult rainbow trout from the stream and finds that the sample standard deviation is0.50 kg. Assume that the current weights of adult rainbowtrout in the stream follow a normal distribution.Does the biologist have sufficient evidence to conclude that the population standard deviation, o,differs from0.38 kg?To answer, complete the parts below toperform a hypothesis test. Use the significance level of0.10.(a) Formulate the null hypothesish and the alternative hypothesish What would you use to perform the test?1ho:0:h1:0●O S0<0OSO□<ロ0=0 ☐#0(b) Perform a chi-square test. This is information that will help you perform the test.22X0.95 is the value that delimits an area of0.05 in the left tail of the distribution, and%0.05 is the value that delimits an area of 0.05 in the right tail ofthe distribution.

Consider the given information:Sample size (n) = 18Sample standard deviation (s) = 0.50Population…

Answered: Records indicate that the average…

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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To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 40 feet. Assume the population standard deviation is 4.9 feet. The mean braking distance for Make B is 44 feet. Assume the population standard deviation is 4.6 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) through (e). Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table. (a) Identify the claim and state H, and Ha. What is the claim? A. The mean braking distance is different for the two makes of automobiles. B. The mean braking distance is less for Make A automobiles than Make B…
To compare the dry braking distances from 30 to 0 miles per hour for two makes of automobiles, a safety engineer conducts braking tests for 35 models of Make A and 35 models of Make B. The mean braking distance for Make A is 42 feet. Assume the population standard deviation is 4.7 feet. The mean braking distance for Make B is 45 feet. Assume the population standard deviation is 4.4 feet. At a = 0.10, can the engineer support the claim that the mean braking distances are different for the two makes of automobiles? Assume the samples are random and independent, and the populations are normally distributed. Complete parts (a) rari rz (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are (Round to three decimal places as needed. Use a comma to separate answers as needed.)
With a mean of 10 and standard deviation of 5. Assume that the population data are normally distributed. Calculate the z-score for a raw score of 5. What proportion of the distribution is equal to or less than this score?
Records indicate that the mean weight of mature rainbow trout in Eagle Creek is 1.75 kg with a standard deviation of 0.33 kg. After years of marked oxygen depletion from pollutants in the creek, a biologist wants to see if the standard deviation, o, of weights has changed. The biologist measures the weights of 20 randomly chosen mature rainbow trout from the creek and finds that the sample standard deviation is 0.38 kg. Assume the current weights of mature rainbow trout in the creek follow a normal distribution. Does the biologist have sufficient evidence to conclude that the population standard deviation, o, differs from 0.33 kg? To answer, complete the parts below to perform a hypothesis test. Use the 0.10 level of significance.
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The standard deviation of pulse rates of adult males is less than 10 bpm. For a random sample of 144 adult males, the pulse rates have a standard deviation of 9.1 bpm. Find the value of the test statistic.
Blood pressure is distributed Normally, with a mean of 85 mm and a standard deviation of 20 mm. What fraction of the population has a blood pressure above 80 mm?
A random sample of 100 observations from a quantitative population produced a sample mean of 28.0 and a sample standard deviation of 6.5. Use the p-value approach to determine whether the population mean is different from 31.
The shelf life of a batteries produced by one major company are normally distributed with a mean of 4.3 years and a standard deviation of 0.6 years. The figure below shows the distribution of shelf lives of batteries produced by one major company. Calculate the shaded area under the curve. Answer:
Pyramid Lake is on the Paiute Indian Reservation in Nevada. The lake is famous for cutthroat trout. Suppose a friend tells you that the average length of trout caught in Pyramid Lake isμ=19 inches. However, a survey reported that of a simple random sample of 38 fish caught, the mean length was 19.9 inches, with estimated standard deviation of 3.1 inches. Do these data indicate that the average length of a trout caught in Pyramid Lake is different from μ=19inches? Use α=0.001. What is the value of the test statistic? (Round your answer to two decimal places.)Find the P-value. (Round your answer to four decimal places.)
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