You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believethe population proportion is approximately pesimate is within 2% of the true population proportion. How large of a sample size is required?= 18%. You would like to be 99% confident that yourDo not round mid-calculation. However, use a critical value accurate to three decimal places.Submit Question2/#/skip/19Ncho 耳自:hpinsprt scdelef12f1o►►f9f8f7f6f510ba&%248.6.86

Find z-critical value: Refer Standard normal table/Z-table OR use excel function…

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p* = 18 % . You would like to be 99% confident that your esimate is within 2% of the true population proportion. How large of a sample size is required? n =

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p* = 18 % . You would like to be 99% confident that your esimate is within 2% of the true population proportion. How large of a sample size is required? n =

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A random sample of 41 adult coyotes in a region of northern Minnesota showed the average age to be x = 2.09 years, with sample standard deviation s = 0.83 years. However, it is thought that the overall population mean age of coyotes is μ = 1.75. Do the sample data indicate that coyotes in this region of northern Minnesota tend to live longer than the average of 1.75 years? Use α = 0.01. Solve the problem using the critical region method of testing (i.e., traditional method). (Round your answers to three decimal places.) test statitics= critical=
Find the percentage of measurements in the data set that fall within each of the intervals . Do these percentages agree with either Chebyshev’s rule or the empirical rule?
A doctor wants to estimate the mean trigliceride level of all 20- to 29-year-old females (in milligram per deciliter, mg/dL). How many subjects are needed to estimate the mean trigliceride level within 4 mg/dL with 95% confidence assuming s=16.2 mg/dL from an earlier study?The doctor needs to sample at least ?? 20- to 29-year-old females.
You are interested in estimating the mean weight of the local adult population of female white-tailed deer (doe). From past data, you estimate that the standard deviation of all adult female white-tailed deer in this region to be 34 pounds. What sample size would you need to in order to estimate the mean weight of all female white-tailed deer, with a 96% confidence level, to within 7 pounds of the actual weight? (Use Excel to find the appropriate critical value and round to 3 decimal places.)
The Rockwell hardness index for steel is determined by pressing a diamond point into the steel and measuring the depth of penetration The manufacturer claims that this steel has an average hardness index of 64. A competitor decides to check out this claim. Formulate null and alternative hypotheses that the competitor should check in order to test the manufacturer’s claim. What type of test should be used?
The national average for the percentage of high school graduates taking the SAT is 49%, but the state averages vary from a low of 4% to a high of 92%. A random sample of 340 graduating high school seniors was polled across a particular tristate area, and it was found that 184 had taken the SAT. Estimate the lower boundary of the true proportion of high school graduates in this region who take the SAT with 95% confidence. Only the final answer should be rounded-off to THREE decimal places.
We test for a hypothesized difference between two population means H0:μ2. The population standard deviations are unknown but assumed equal. The number of observations in the first sample is 15, and 12 in the second sample. How many degrees of freedom are associated with the critical value?
The quality control manager at a light bulb factory needs to determine whether the meanlife of a large shipment of light bulbs is equal to 450 hours. A random sample of 100 lightbulbs indicates a sample mean life of 465 hours with 60 hours of the sample standarddeviation. At the 0.01 significance, is there evidence that the population mean life is differentfrom 450 hours? Solve this problem based on critical value approach.(Show me every step including pre-step and post-step for full credit)
The pulse rates of 155 randomly selected adult males vary from a low of 40 bpm to a high of 108 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 98% confidence that the sample mean is within 2bpm of the population mean. Find the sample size using the range rule of thumb to estimate σ.
You are interested in estimating the the mean weight of the local adult population of female white-tailed deer (doe). From past data, you estimate that the standard deviation of all adult female white-tailed deer in this region to be 29 pounds. What sample size would you need to in order to estimate the mean weight of all female white-tailed deer, with a 96% confidence level, to within 8 pounds of the actual weight? (Use Excel to find the appropriate critical value and round to 3 decimal places.)Sample Size:
Historicallythe proportion of students entering a university who finished in 4 years or less was 63%. To test whether this proportion has decreased, 122 students were examined and 51% had finished in 4 years or less. To determine whether the proportion of students who finish in 4 year or less has statistically significantly decreased (at the 5% level of signficance), what is the critical value? (please round your answer to 2 decimal places )
The highway department wants to estimate the proportion of vehicles on Interstate 25 between the hours of midnight and 5:00 A.M. that are 18-wheel tractor trailers. The estimate will be used to determine highway repair and construction considerations and in highway patrol planning. Suppose researchers for the highway department counted vehicles at different locations on the interstate for several nights during this time period. Of the 3,263 vehicles counted, 1,009 were 18-wheelers.a. Determine the point estimate for the proportion of vehicles traveling Interstate 25 during this time period that are 18-wheelers.b. Construct a 99% confidence interval for the proportion of vehicles on Interstate 25 during this time period that are 18-wheelers.