4G*1 16% 12:30Practical 4_sem2.docxPractical 41. A manufacturer claims that his market share is 60%. However a randomsample of 500 customers reveals that only 275 are users of his product.Test the manufacturer's claim at the 1% level of significance.2. Suppose we want to determine whether height above sea level has animpact on the boiling temperature of a certain liquid. Two independentsamples are taken. The first sample of size 80 taken at the coast shows amean boiling temperature of 78 degrees Celsius and a standard deviationof 5 degrees Celsius. The second sample of size 100 taken inland has amean boiling temperature of 80 degrees Celsius and a standard deviationof 10 degrees Celsius. Test the hypothesis at a 10% significant level thatthere is no difference between the two mean boiling temperatures.3. Suppose that we want to compare the clarity of two lakes in NorthAmerica. The clarity of Lake Tahoe was measured at 50 places and theaverage depth of clarity was 4 meters with a standard deviation of 0.25meters. The clarity of Lake Michigan was measured at 55 places and theaverage depth of clarity was 3 meters with a standard deviation of 0.5meters. Test the hypothesis at a 5% significant level that there is nodifference in the mean depth of clarity.4. Two procedures were developed in research laboratory to purify oil,namely procedure A, which is quite simple and quick, and procedure B,which is considerably more expensive. Preliminary tests yielded thefollowing results:Would you say that the mean amount recycled with procedure B is morethan with procedure A? Use a 5% significance level and assume that thequality of oil recycled is normally distributed with equalvariances.5. A certain nature conservationist claims that the average number of eggslaid by a species of sparrow, after a major building project in its habitat, isless than what it was before the building project started. She colletd the1/2"StimoroWIN YOUR SHARE OFND OUT MORE 49 1 16% 12:30Practical 4_sem2.docxfollowing data to back her claim.Nest 1234 56789.10 1112Befor 20 910 1 714 881 13 7eAfter 710 12 19.14 811 8 311 3If the number of eggs laid bysparrows follows a normal distribution, test at a 5% level of significance ifthe conservationist's claim is true.6. A medical doctor claims that the proportion of female patients with highblood-pressure is smaller than the proportion of male patients with highblood-pressure. The doctor conducted a survey in his practice. Out of the100 female patients only 13 had high blood-pressure and out of the 110male patients, 33 had high blood-pressure. Test the doctor's claim at a 5%level of significance. Assume that the population proportions are equal.+2/2"StimoroWHEN YOU BUY 2 PARTICIPATINGSTIMOROL PACKSIND OUT MORE

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1. A manufacturer claims that his market share is 60%. However a random sample of 500 customers reveals that only 275 are users of his product. Test the manufacturer's claim at the 1% level of significance.

1. A manufacturer claims that his market share is 60%. However a random sample of 500 customers reveals that only 275 are users of his product. Test the manufacturer's claim at the 1% level of significance.

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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Two separate samples receive two different treatments. The first treatment group (N = 9) has a mean of 50 with SS = 710. The second treatment group (N = 6) has a mean of 60 with SS = 460. Is the second treatment group significantly larger than the first? What is the effect size?
In a sample of 88 children selected from a city, 8 children suffer from asthma. What is the P-value required to test the claim that the proportion of all children with asthma in the town is equal to 11%?
Hi! help me with this please. TYSM! In a study by the United Dairy IndustryAssociation, 42% of 655 persons age 35–44 said theyseldom or never ate cottage cheese. For 455 individualsage 45–54, the corresponding percentage was 34%. At the0.01 level, can we reject the possibility that the populationpercentages could be equal for these two groups?
The National Collegiate Athletic Association (NCAA) measures the Graduation Success Rate (GSR), which is the percentage of eligible athletes who graduate within six years of entering college. According to the NCAA, the GSR for all scholarship athletes in a particular division is 64%. The GSR for all students in this division is 61%. Suppose the NCAA report was based on a sample of 1,000 student-athletes, of which 640 graduated within six years. Is this sufficient information to conclude that the GSR for all scholarship athletes in this division differs from 61%? Carry out the test using a Type I error rate of 0.05. What are the hypotheses for this test? O A. Ho: p# 0.61 Ha: p=0.61 OC. Ho: p > 0.61 H₁: p≤0.61 E. Ho: p=0.61 Ha: p Calculate the value of the z-statistic for this test. Z= (Round to two decimal places as needed.) What is the rejection region? Select the correct choice below and fill in the answer box(es) to complete your choice. (Round to two decimal places as needed.) O A.…
The U.S. Department of Transportation, National Highway Traffic Safety Administration, reported that 77% of all fatally injured automobile drivers were intoxicated. A random sample of 52 records of automobile driver fatalities in a certain county showed that 33 involved an intoxicated driver. Do these data indicate that the population proportion of driver fatalities related to alcohol is less than 77% in Kit Carson County? Use ? = 0.05. (a) level of significance: .05 | H0: p = 0.77; H1: p < 0.77 (b) The standard normal, since np > 5 and nq > 5. What is the value of the sample test statistic? (Round your answer to two decimal places.) Find the P-value of the test statistic. (Round your answer to four decimal places.)
just the last part thank you!
It has been claimed that at UCLA at least 40% of the students live on campus. In a random sample of 250 students, 90 were found to live on campus. Does the evidence support the claim at = .01?
A survey by Men’s Health magazine stated that 14% of men said they used exercise to reduce stress. Could this be valid, or is it actually less than what the magazine claims? A random sample of 100 men was selected, and 10 said that they used exercise to relieve stress. If a=0.10, test a hypothesis and state your conclusion in context.
In a random sample of males, it was found that 29 write with their left hands and 212 do not. In a random sample of females, it was found that 70 write with their left hands and 444 do not. Use a 0.01 significance level to test the claim that the rate of left-handedness among males is less than that among females. Complete parts (a) through (c) below.
In a previous poll, 39% of adults with children under the age of 18 reported that their family ate dinner together seven nights a week. Suppose that, in a more recent poll, 422 of 1145 adults with children under the age of 18 reported that their family ate dinner together seven nights a week. Is there sufficient evidence that the proportion of families with children under the age of 18 who eat dinner together seven nights a week has decreased? Use the x = 0.01 significance level. Because npo (1-Po) = 272.4 > 10 and the sample size is the hypothesis are satisfied. (Round to one decimal place as needed.) What are the null and alternative hypotheses? Ho: P = versus H₁: ▼ V (Type integers or decimals. Do not round.) Find the test statistic, Zo- C less than 5% of the population size, and the sample is given to be random, the requirements for testing Zo = (Round to two decimal places as needed.) Find the P-value. P-value = (Round to three decimal places as needed.) Is there sufficient…
2. Some scientists believe that the presence of antibody to milk protein lowers the chance of survival after a heart attack. To explore this belief, a medical team took blood specimens from 335 male heart-attack patients and tested them for the presence of the antibody. The patients were then followed to determine whether they lived for 6 months following their heart attack. The results are presented in Table 2. Suppose we want to answer the following question: "Test, at the 5% level of significance, whether there is an association between the presence of antibody to milk protein and survival after a heart attack." Table 2: Survival vs Antibody to Milk Protein contingency table Survival Antibody to Milk Protein Alive Died Total Present 24 52 76 Absent 126 133 259 Total 150 185 335 SPSS produced the information needed to perform the hypothesis test in Table 3. Table 3: Chi-Square Tests Results Chi-Square Tests Asymptotic Significance (2-sided) Exact Sig. (2- sided) Exact Sig. (1- sided)…
In a previous poll, 38% of adults with children under the age of 18 reported that their family ate dinner together seven nights. suppose that, in a more recent poll, 399 of 1099 adults with children under the age of 18 reported that their family ate dinner together seven nights a week. is there sufficient evidence that the proportion of families with children under the age of 18 who eat diner together seven nights a week has decreased? use the a=0.05 significance level