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Unit 3 Chapter 7: Lesson 7.7 Assignment Pro ress saved Done Score: 0/100 0 17 answered g 'J 0 Question 7 v B 0/6 pts 0 2 :3 5 The city of Raleigh has 6,200 registered voters. There are two candidates for city council in an upcoming election: Brown and Feliz. The day before the election, a telephone poll of 550 randomly selected registered voters was CondUCtEd. 239 said they'd vote {or Brown, 292 said they'd vote for FeliZ, arid 19 were undecided. Give the sample statistic for the proportion of voters surveyed who said they'd vote for Brown. Round your answer to four decimal piaces. This sample statistic suggests that we might expect of the 6,200 registered voters to vote for Brown. MATH1127: Introduction to Statistics (Asynchronous (100% Online)) 20365 ... Lesson 7.6 The Central Limit Theorem for Proportions Unit 3 Chapter 7: Lesson 7.6 Assignment In an certain species of newt, offspring are born either green or black. Suppose that 65% of these newts are born green. If we sample 91 of these newts at random, the probability distribution for the proportion of green newts in the sample can be modeled by the normal distibution pictured below. Complete the boxes accurate to two decimal places . Note: The left box is 2 standard deviations below the mean. The middle box is the mean. And, the right box is 2 standard deviations above the mean.V. s .th \"tusw m Assignment Unit 3 Chapter 7: Lesson 7.7 Assignment Pro res; d D Score: 0/100 0/17 answered g save one '5'. .Question11 v BOIGptsOZBSBG K A Food Marketing Institute found that 28% of households spend more than $125 a week on groceries. Assume the population proportion is 0.28 and a simple random sample of 111 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is less than 0.29? There is a probability that the sample proportion of households spending more than $125 a week is less than 019. Round the answer to 4 dezimal places. Unit 5 Lnapter I: Lesson 7.7 Assignment Score: 2/100 0/17 answered 0 Question 16 v Suppose the age that children learn to walk is normally distributed With mean 11 months and standard deviation 1.2 month. 12 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X - Nd bl What Is the distribution of :2? i ~ N(/ ,i i) c. What is the probability that one randomly selected person learned to walk when the person was between 9.5 and 11.5 months old? i d For the 12 people, find the probability that the average age that they learned to walk is between 9.5 and 11.5 months old. e For part :1), is the assumption that the distribution is normal necessary? 0 N01) Yes it Find the IQIQJor the average first time walking age for groups of 12 people Q1 : months months Q3 IQR: months EOIS pts '5 0 Question 11 v 1: [3 0/ According to a 2009 Reader's Digest article, people throw away about 11% of what they buy at the grocery store. Assume this is the true proportion and you plan to randomly survey 132 grocery shoppers to investigate their behaviorl What is the probability that the sample proportion does not exceed 0.08.7 Note: You should carefully round any names you calculate to 4 decimal places to match warnap's approach and calculations. Answer = ' (Enter your answer as a number accurate to 4 decimal places.) Question Help: 8 Message instructor 0 Question 14 v k [30/7 [115 0 2 2 Suppose the true proportion of voters m the county who support a new fire district is 0.55. Consider the samphng distribution for the proportion of supporters with sample size n : 118. What is the mean of this distribution? i What is the standard error of this distribution? ' Question Help: 8 Message instructor Submit Question Unit 3 Chapter 7: Lesson 7.7 Assignment Progress saved Score: 0/100 0/17 answcicd 0 Question 2 v B 0 k A normal distributed population has parameters u : 218.2 and a : 23.7, If a random sample of size n = 212 Is selected, a. What 15 tile mean of the distribution of sample means? Iii = b. What is the standard deviation of the distribution of sample means? Round [a two decimal places a, : Unit 3 Chapter 7: Lesson 7.7 Assignment Progress saved Done Score: 0/100 0/17 answered Question 10 0/6 pts 9 2 In an election, suppose that 60% of voters support a school levy increase. If we poll 127 of these voters at random, the probability distribution for the proportion of the polled voters that support a school levy increase can be modeled by the normal distibution pictured below. Complete the boxes accurate to two decimal places .MATH1127: Introduction to Statistics (Asynchronous (100% Online)) 20365 .Lesson 7.7 Using the Central Limit Theorem (Combination) Unit 3 Chapter 7: Lesson 7.7 Assignment Question 12 2/6 pt Labor force participation among women rose in the United States between 1975 and 2000 and has beeen declining ever since. According to the U.S. Bureau of Labor Statistics, 54% of women were in the labor force in 2015. 1. If 80 working age women are randomly selected, what is the probability that between 51% and 62% are in the labor force? Round your answer to 4 decimal places. 2. If 200 working age women are randomly selected, what is the probability that between 51% and 62% are in the labor force? Round your answer to 4 decimal places.Progress Question 6 Suppose that the efficacy of a certain drug is 0.4. Consider the sampling distribution (sample size n = 150 ) for the proportion of patients cured by this drug. a. What is the mean of this distribution? b. What is the standard error of this distribution? Round the answer to three decimal places.Unit 3 Chapter 7: Lesson 7.7 Assignment Progress saved Done VO Score: 0/100 0/17 answered Question 5 0/6 pts 2 2 A population of values has a normal distribution with u = 185.5 and o = 73.7. a. Find the probability that a single randomly selected value is between 169.5 and 189.8. Round your answer to four decimal places. P(169.5 Suppose the true proportion of voters in the county who support a specific candidate is 0.56, Consider the sampling distribution for the proportion of supporters with sample size n : 111. a. What is the mean of this distribution? up\" : i b What is the standard error (Le. the standard deviation) of this sampling distribution, rounded to three decimal places? 01371 l i l l .Question1 v1 According to a survey, 10% of Americans are afraid to fly. Suppose 1,100 Americans are sampled. at What is the probability percentage that 121 or more Americans in the survey are afraid to fly? Round the percent to two decimal places. C 7 b. What is the probability percentage that 165 or more Americans in the survey are afraid to fly? Round the percent to two decimal places. [ c. What is the probability percentage that 8% or less of theAmericans surveyedinswered they were afraid to fly? Round the percent to two decimal places Unit 3 Chapter 7: Lesson 7.7 Assignment Progress saved Don Score: 0/100 0/17 answered Question 3 0/6 pts A population of values has a normal distribution with u - 82 and o - 96.6. If a random sample of size n = 11 is selected, a. Find the probability that a single randomly selected value is less than 6.3. Round your answer to four decimals. P ( X ~ A Food Marketing Institute found that 32% of households spend more than $125 a week on groceries. Assume the population proportion is 032 and a simple random sample oi 305 households is selected from the population. What is the probability that the sample proportion of households spending more than $125 a week is less than 0.357 There is a probability that the sample proportion oi households spending more than $125 a week is less than 0.35, Round the answer to 4 decimal places. Question Help: l3 Video E Message instructor Unit 3 Chapter 7: Lesson 7.7 Assignment Progress saved Done Score: 2/100 0/17 answered Question 13 0/6 pts 9 2 A population of values has a normal distribution with u = 112.5 and o = 35.7. You intend to draw a random sample of size n = 186. Please show your answers as numbers accurate to 4 decimal places. Find the probability that a single randomly selected value is less than 112. P(X R Based on historical data, your manager believes that 42% of the company's orders come from first-time customers, A random sample of 69 orders will be used to estimate the proportion of firstrtime-customers. What is the probability that the sample proportion is between 0.24 and 0.49.7 Note: You should carefully round any names you calculate to 4 decimal places to match wamap's approach and calculations. Answer = (Enter your answer as a number accurate to 4 decimal places.) Question Help: 8 Message instructor rm Question 4 A random sample of size n = 510 from a population whose parameter is p = 0.52. a. What is the mean of the distribution of sample proportions? Round the answer accurate to 2 decimal places. b. What is the standard deviation of the distribution of sample proportions? Round the answer accurate to 2 decimal places. Up=0 Question 5 v 0/7 pts 9 2 Pick the meaning of each symbol below: LL Select an answer Sample Mean D Sample Proportion p Population Mean Population ProportionUnit 3 Chapter 7: Lesson 7.7 Assignment Progress saved Done Vo Score: 0/100 0/17 answered Question 9 0/5 pts 9 2 9 A random sample of size n = 696 from a population whose parameter is p - 0.16. a. What is the mean of the distribution of sample proportions? Round the answer accurate to 2 decimal places. Up = b. What is the standard deviation of the distribution of sample proportions? Round the answer accurate to 2 decimal places.Unit 3 Chapter 7: Lesson 7.7 Assignment Progresssaved Done V561 Score: 2/100 0/17 answered 0 Question 14 v