The Children's Hospital of Orange County (CHOC) recommends that children drink the number of 8-ounce cups of water equal to their age. This means that a five-year-old child should drink five 8-ounce cups of water each day (40 oz of water).Suppose a sample of 50 five-year-old children was randomly selected from all residents of Irvine, CA.Families of the children were asked to record their child's water consumption for two consecutivedays on a weekend and the average number of ounces of water over the two days was recorded asthe estimated daily water intake for each child. The study started in June and ended in August.Suppose you find that the average water intake of all five-year-olds in the sample is 37 ounces perday with a standard deviation of 4.5 oz.14. Based on the 95% Cl of (35.25193, 38.87857), which of the following values is plausible for a p-value?0.25050.850.950.002505

Answered: Image /qna-images/answer/9e30f1b2-3ac7-48db-97dd-690b29b8ab37.jpg

Answered: 14. Based on the 95% Cl of (35.25193,…

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 marketing manager fora cell phone company claims that the percentage of children aged 8-12 who have cell phones differs from 61%. In a survey of 826 children aged 8-12 by a national consumers group, 545 of them had cell phones. Can you conclude that the managers claim is true? Use the a = 0.10 level of significance and the p value method with the ti 84 plus calculator. Compute the p value. Round the answers to at least four decimal places.
A random sample of leading companies in South Korea gave the following percentage yields based on assets. 2.4 1.9 4.6 1.2 0.1 3.6 2.4 0.2 1.7 1.8 1.4 5.4 1.1 Use a calculator to verify that s2 ≈ 2.479 for these South Korean companies.Another random sample of leading companies in Sweden gave the following percentage yields based on assets. 2.2 3.3 3.3 1.4 3.7 2.8 2.3 3.5 2.8 Use a calculator to verify that s2 ≈ 0.546 for these Swedish companies.Test the claim that the population variance of percentage yields on assets for South Korean companies is higher than that for companies in Sweden. Use a 5% level of significance. How could your test conclusion relate to an economist's question regarding volatility of corporate productivity of large companies in South Korea compared with those in Sweden? (a) What is the level of significance? (b) Find the value of the sample F statistic. (Use 2 decimal places.)What are the degrees of freedom? dfN dfD
A random sample of leading companies in South Korea gave the following percentage yields based on assets. 2.3 2.2 4.1 1.5 0.9 3.6 2.4 0.2 1.7 1.8 1.4 5.4 1.1 Use a calculator to verify that s2 ≈ 2.025 for these South Korean companies.Another random sample of leading companies in Sweden gave the following percentage yields based on assets. 2.4 3.7 3.7 1.6 3.7 2.8 2.3 3.5 2.8 Use a calculator to verify that s2 ≈ 0.573 for these Swedish companies.Test the claim that the population variance of percentage yields on assets for South Korean companies is higher than that for companies in Sweden. Use a 5% level of significance. How could your test conclusion relate to an economist's question regarding volatility of corporate productivity of large companies in South Korea compared with those in Sweden? (a) What is the level of significance?State the null and alternate hypotheses. Ho: ?12 = ?22; H1: ?12 > ?22Ho: ?12 > ?22; H1: ?12 = ?22 Ho: ?22 = ?12; H1: ?22 >…
The following table shows the results of a screening test hypothesized to identify persons at risk for a rare blood disease. Compute the False Positive Fraction of the test. No Disease Disease Screen Negative 1351 20 Screen Positive 39 41
A humane society claims that less than 61% of households in a certain country own a pet. In a random sample of 700 households in that country, 399 say they own a pet. At a= 0.05, is there enough evidence to support the society's claim? Complete parts (a) through (c) below. (a) Identify the claim and state H, and Ha. Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do not round.) O A. The percentage households in the country' that own a pet is not %. O B. Less than % of households in the country own a pet. O C. More than % of households in the country own a pet. O D. % of hoúseholds in the country own a pet.
What is the cumulative frequency of students that scored half of the points on the SAT? choices: 1. none of the above/can't be determined 2. 26 3. 9 4. 55.5 5. 0.35 I already tried 2(26) and 5(0.35) but it was wrong.
The control department of a light bulb manufacturer randomly picks 4400 light bulbs from the production lot every week. The records show that, when there is no malfunction, the defect rate in the manufacturing process (due to imperfections in the material used) is 1%. When 1.25%o or more of the light bulbs in the sample of 4400 are defective, the control unit calls repair technicians for service. Answer the following. (If necessary, consult a list of formulas.) (a) Find the mean of p, where p is the proportion of defective light bulbs in a sample of 4400 when there is no malfunction. (b) Find the standard deviation of p. (c) Compute an approximation for P(p N 0.0125), which is the probability that the service technicians will be called even though the system is functioning properly. Round your answer to four decimal places.
A randómly selected sample of 1000 college students was asked whether they had ever used the drug STC sixteen percent (16%) of the 1000 students survived said they had. which one v. of the following statements about the number (0.16) is correct: A. It is a sample proportion. B. it is a population proportion. C. it is a margin of error. D. it is a randomly chosen number Q2. [2+3=5 points] In a survey of 200 households it was found that 152 households had at least one car estimate the proportion of households in the population that have at least one car and place abound on the error of estimation assuming that the total number of households is 1500.Interpret your results (comment on the results) Q3. [5points] An advertising firm is interested to estimate the average television-viewing time, in hours per week, in a city. The city is divided into three blocks. A stratified random sample of 60 households was selected proportionately from each block considering the blocks as strata. The…
A financial analyst of Woolworths is interested in the average number of months that it takes customers to pay off their account debt. He claims that the average number of months it takes is less than four. He takes a sample of fifty customers and records the number of months it takes each customer to pay off his debt. Suppose that the test statistic value to test this claim is calculated as -0.34, determine the p-value.
Express each of your first five answers as a decimal and round to the nearest 0.001 (in other words, type 0.123, not 12.3% or 0.123456).What fraction of survey respondents identified themselves as Democrats? What fraction of survey respondents thought the economy was getting better? What fraction of Democrats thought the economy was getting better?
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14. Based on the 95% Cl of (35.25193, 38.87857), which of the following values is plausible for a p- value?