In a study of the accuracy of fast food​ drive-through orders, Restaurant A had 307 accurate orders and 64 that were not accurate. a. Construct a 90​% confidence interval estimate of the percentage of orders that are not accurate. b. Compare the results from part​ (a) to this 90​% confidence interval for the percentage of orders that are not accurate at Restaurant​ B: 0.161

Q: In a sample of 16 fish from my pond it was found that 5 are under 165 grams in weight. Based on this…

A: Given  n=5 p= 5/16 = 0.312 1-p = 1-0.312 = 0.688 Standard error SE = p(1-p)/n

Q: In a survey of 500 potential jurors, one study found that 350 were regular watchers of at least one…

A: It is given that sample size (n) is 500 and x is 350.

Q: Calculate the 95% and 99% population proportion confidence intervals for this finding.

A: Answer: Given that  the random sample of 100 people  n=100  r=74 The test statistics for population…

Q: In a simple random sample of 300 college students, 35.0 percent stated that they intended to pursue…

A: The random variable X follows normal distribution. We have to construct 95% confidence interval.…

Q: In a study of the accuracy of fast food​ drive-through orders, Restaurant A had 241 accurate orders…

A: The formula for the 95% confidence interval for the proportion is given below:

Q: A random sample of 5006 adults in a country includes 755 who do not use the Internet. Construct a…

A: Formula :

Q: A study conducted to examine the age of commercial jets in the United States sampled 36 planes and…

A: Given information- Sample size, n = 36 Sample mean, x-bar = 12.6 years Sample standard deviation, s…

Q: In a simple random sample of 38 bulbs, 25 gives a good glow, What is a 85% score Confidence interval…

A: Given data,n=38x=25sample proportion p=xn=2538=0.66z-value at 85% confidence is Zc=1.44

Q: A sociologist is interested in surveying workers in computer-related jobs to estimate the proportion…

A: The formula for the sample size is as follows: Here,zα/2 is the critical value at 95% confidence…

Q: In a study of the accuracy of fast food​ drive-through orders, Restaurant A had 266 accurate orders…

A: Given Data: p=xn=54266=0.203 n=266   Z-score corresponding to 90% Confidence level=1.645

Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

A: formula for the sample size :

Q: The Pew Forum on Religion and Public Life reported on Dec. 9, 2009, that in a survey of 2003…

A:

Q: Given that you have a sample size of 10 different soda pops, with a sample mean of 2.228 and a…

A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 2.228 Sample standard…

Q: 2. In a study to estimate the proportion of residents in a certain city and its suburbs who favor…

A: Given that  X1=450  X2=240 N1=1000  N2=800 P1=0.45  P2=0.3

Q: In the past, 44% of those taking a public accounting qualifying exam have passed the exam on their…

A: Denote p as the true proportion of individuals to pass the exam on first try.

Q: Suppose a retailer claims that the average wait time for a customer on its support line is 185…

A: It is given that the mean is 177 and the population standard deviation is 53.

Q: Suppose that a random sample of eighteen recently sold houses ina certain city has a mean sales…

A:

Q: The Pew Forum on Religion and Public Life reported on Dec. 9, 2009, that in a survey of 2003…

A: Given : Sample size(n)=2003sample proportion(p^)=0.25confidence level (c)=0.99α=1-c   =1-0.99…

Q: 2. The population of SULU Hornbill ( one of the endangered bird species in the Philippines) has a…

A: In testing of a hypothesis, Confidence interval is an interval such that the probability of the…

Q: A sociologist is interested in surveying workers in computer-related jobs to estimate the proportion…

A: From the given information, Consider, the proportion of such workers who have changed jobs within…

Q: In a study of the accuracy of fast food drive-through orders, restaurant a had 346 accurate orders…

A:

Q: In a Harvard School of Public Health survey, 2105 of 10,904 randomly selected U.S. college students…

A: Given data is appropriate for testing of hypothesis. Because it is a large sample test for single…

Q: In a study of contamination at landfills containing construction and demolition waste, 42 leachate…

A: Solution:   The samples came from the same sample, they are not independent. It is not appropriate…

Q: In the network of centers for minors in a certain region, it is necessary to check if for a certain…

A: For a confidence level of 99% , given claim is to test average number of escape attempts is actually…

Q: In a study of academic procrastination, the authors of a paper reported that for a sample of 451…

A: Given Information: Sample size (n) = 451  Mean value (x) = 7.14 hours Standard Deviation (s) = 3.20…

Q: In a recent poll of 1200 randomly selected adult office workers, 32% said they had worn a Halloween…

A: a. it is given that 32% said they had worn a Halloween costume to the office at least once. A sample…

Q: In a recent poll of 900 randomly selected adults, 37 % reported that they could not swim 24 yards…

A: Given information: In a poll of 900, randomly selected adults were examined if they could swim 24…

Q: how many students do we need to construct a 95% confidence interval for the proportion of the…

A: here given ,  margin of error  = 3% = 0.03  confidence level = 95%  n = 150  p^= 0.68

Q: survey conducted by Gallup in 2020 asked 1,102 randomly selected U.S. adults, "What do you think is…

A: We have given that  Sample size n=1102 90% confidence interval.  = (0.6773, 0.7227)

Q: In the past, 44% of those taking a public accounting qualifying exam have passed the exam on their…

A: Given: p=0.44 n=250 X: Passing on first attempt X=130 α=0.025

Q: To find the proportion of San Diegans subscribed to Disney+ in 2019, a researcher randomly selected…

A: A random sample of 200 people from San Diego are considered in which 101 are found subscribed to…

Q: A certain article indicates that in a sample of 1,000 dog owners, 610 said that they take more…

A: Given: Sample size (n) = 1000 Number of owners who take more picture of their dog than their owner =…

Q: In a study of the accuracy of fast food​ drive-through orders, Restaurant A had 241 accurate orders…

A: It is given that Restaurant had 241 accurate orders and 71 are not accurate orders. The total number…

Q: 4. A random sample of 64 bicycle-riding adults in Portland indicated that 24 always wore a helmet…

A:

Q: Suppose data collected by observers at randomly selected intersections across the country revealed…

A: a) Given that there are 250 sample of drivers. Among 250 drivers, 50 were using their cell phone.…

Q: From a research survey, it was found that a random sample of 18 elementary graduates of an exclusive…

A: To find: a. Use the traditional method, and b. The P-value method c. Construct a 95% confidence…

Q: Find the minimum sample size required to construct a 95% confidence interval estimate for the…

A: From the provided information, Margin of error (E) = 3.5% or 0.035 Confidence level = 95%

Q: 2. The population of SULU Hornbill ( one of the endangered bird species in the Philippines ) has a…

A: Given that  sample size=n=150 sample mean=X¯=65 population standard deviation=σ= 40 confidence…

Q: in a study of government financial aid for college​ students, it becomes necessary to estimate the…

A:

Q: Stainless steels can be susceptible to stress corrosion cracking under certain conditions. A…

A: a) Given information Error = 0.05 Confidence level = 0.98 We need the sample size to be 541

Q: In a controlled and scientifically valid study of sleeping pills, 40 people who took Pill A averaged…

A:

Q: In a random sample of 50 patients undergoing a standard surgical procedure, 15 required medication…

A:

Q: na study of the accuracy of fast food drive-through orders, Restaurant A had 342 accurate orders and…

A: Given data,No of accurate orders=342No of not accurate orders=74Total orders=416construct a 90% CI…

Q: A certain article indicates that in a sample of 1,000 dog owners, 660 said that they take more…

A: The provided data mentions the value of sample size, n is 660 and the value of x is 470. The sample…

Q: 5. In previous years the average number of patients per hour at a hospital emergency room on…

A: n x¯ s Weekends 30 13.8 3.1 Weekdays 30 8.6 2.7

Q: 1. A manufacturer of dog food is concerned about the low levels of sales recorded of one of its…

A: Givensample size(n)=1000x=230p^=xn=2301000=0.230Confidence…

Q: According to a report on sleep deprivation by the Centers for Disease Control and Prevention, the…

A: Given that  p^1=7.8%=0.078p^2=8.7%=0.087n1=11937n2=4892p^=n1p^1+n2p^2n1+n2=0.0806 Confidence…

Q: in a study of the accuracy of fast food drive thru orders, restaurant A had 209 accurate orders and…

A:

Q: In a study of the accuracy of fast food drive-through orders, Restaurant A had 206 accurate orders…

A: From the given information, Consider, Proportion (p) =not accurate accurate +not accurate…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.