• "Are you getting your money's worth of cereal?" Sometimes, itappears that the cereal box you bought from a local supermarketis not quite full. To be sure that you are getting your money'sworth, you decided to sample ten of the boxes, advertised ashaving 330 grams (g) of cereal, and found their weights (ingrams) as follows.329.94330.05330.23329.58330.21329.87329.65329.85329.89330.03a. Find a point estimate of the true mean weight of the cereal boxes.b. Construct a 90% confidence interval for the true mean weight of thecereal boxes to determine if you have sufficient evidence to indicatethat you are getting your money's worth of cereal. Assume that thedistribution of the weights of cereal boxes is normal.

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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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(b) After receiving complaints from McDonald’s customers in Japan about the amount of french fries being served, the on-line news magazine ”Rocket News” decided to test the actual of the fries served at a particular Japanese McDonald’s restaurant. According to the Rocket News article, the official weight standard set by McDonald’s of Japan is for a medium sized fries to weigh 120 grams. The publication weighed the fries from 25 different medium fries they purchased and found the average weight of the fries in their sample to be 115 grams with variance of 100 grams. Research Question: Does the data suggest that the medium fries from this McDonald’s in Japan are underpacked? Use α =0.05. I computed TS correctly and it is Z = -2.5. Based upon the guidelines in 9.5, this TS leads to reject H0 . Now suppose I change α = 0.01, does the conclusion lead to accept H0 ?
Sick days During contract negotiations, a company seeks tochange the number of sick days employees may take, sayingthat the annual “average” is 7 days of absence per employee.The union negotiators counter that the “average” employeemisses only 3 days of work each year. Explain how bothsides might be correct, identifying the measure of center youthink each side is using and why the difference might exist.
A blood pressure measurement consists of two numbers: the systolic pressure, which is the maximum pressure taken when the heart is contracting, and the diastolic pressure, which is the minimum pressure taken at the beginning of the heartbeat. Blood pressures were measured, in millimeters of mercury (mmHg), for a sample of 10 adults. The following table presents the results. ---Predict the diastolic pressure for a patient whose systolic pressure is 145 millimeters. Round the answer to one decimal place.
Test whether the number of European-made cars differs from 4000 pounds. Use 0.5 level of significance.
Wildlife biologist inspects 153 deer taken by hunters and find 32 of them carrying Lyme disease ticks. 1). If the scientist want to estimate the proportion of the deer that carry Lyme disease ticks within 2% with 90% confidence how many deer should they sample?
A means diastolic blood pressure for a random sample of 50 people was 81% of mercury.
The highway department wants to estimate the proportion of vehicles on a Highway at KM 25 between midnight and 5:00 A.M. The head of the department wants to see how many 18-wheel tractor trailers pass on the road. These estimates will be used to determine highway repairs and construction considerations and in highway patrol planning. The department chief asked investigators to calculate estimates of vehicles at different locations on inter-island roads over the past 7 days. From 3,481 vehicles counted there are 927 are 18-wheel drive. However, out of the total 927, there were 51 vehicles that had accidents so that the sample was calculated based on the results of a reduction in the number of accidents. Specify an approximate point for the proportion of vehicles performingtravel on KM 25 during this time period which is an 18-wheeled vehicle!(Assume the confidence level is 99%). What are the benefits of estimating value estimates in this case (analysis of the answers you have obtained)?
Determine what proportion (n) of a population N of 4,000 will make your research work scientific in terms of sampling? Use the Slovin's formula at 0.05 level of significance. Give the solution.
In an outbreak of typhoid fever among attendees of an acquaintance party, 99 persons ate spaghetti, 30 of whom developed typhoid fever, 63 ate mac-and-cheese of whom 20 developed typhoid fever. Which group of people had the higher attack rate? Express calculated answers in percentage and in 2 decimal places if applicable.
The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 1 of 2: Suppose a sample of 292 tenth graders is drawn. Of the students sampled, 240 read above the eighth grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.
The state education commission wants to estimate the fraction of tenth-grade students that have reading skills at or below the eighth-grade level. Step 1 of 2 : Suppose a sample of 1134 tenth graders is drawn. Of the students sampled, 226 read at or below the eighth-grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth-grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.
The Rollins Sporting Goods Company manufactures base-balls for the professional minor and major leagues at its plants in Costa Rica. According to the rules of major leaguebaseball, a baseball must weigh between 142 and 149grams. The company has taken 20 samples of five baseballseach and weighed the baseballs as follows:Construct an -chart in conjunction with an R-chart tomonitor the baseball-making process, and comment on thecapability of the process.

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