A random sample of 480 houses in San Fernando showed that 260 of them were owneroccupied, while a random sample of 400 houses in Port of Spain showed that 224 of them are owner-occupied. Compute an estimate for the 90% confidence interval for the difference between the proportions in the two areas that are owner-occupied.

Q: More carry-on bags for passengers on a flight can delay the loading and un-loading of passengers.…

A: Given:                              Number of favorable cases (X) = 172…

Q: Two separate surveys were carried out to investigate whether the users of East Coast Expressway are…

A: We need to construct the 93% confidence interval for the difference between population proportions…

Q: In a study of the accuracy of fast food drive-through orders, McDonald’s had 35 orders that were not…

A: x be the number of number of orders that were not accurate from McDonald's and Burger king x1=35…

Q: A senior manager, responsible for a group of 120 junior executives, is interested in the total…

A: It is given that sample members spent a total of 143 hours and the sample size n is 35.

Q: A local firm in Quiapo Manila manufactures LED products that have a lifespan that is approximately…

A:

Q: Suppose company X is interested in the population proportion of households who uses e-commerce apps…

A: From the provided information, Sample size (n) = 290 105 uses e commerce apps. Sample proportion…

Q: A random sample of 300 of toy trains produced by a company are selected from a production line and…

A: Given Data: x=60 n=300 p^=xn=60300=0.2   z-value for 95% Confidence level: z=1.96

Q: Using the data from the 2018 professional baseball season, the American League (AL) had 10 players…

A: In this question, it has been given that American league had 10 players out of 179 who bat over…

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: Twenty-five automobiles are sampled to measure gas mileage. The results yielded an average of 26.4…

A: Given that n =25,x bar =26.4,s.d =3.4 Construct a 90% confidence interval for the mean miles per…

Q: A random sample found that forty percent of 100 Americans were satisfied with the gun control laws…

A: The objective of this question is to compute a 99% confidence interval for the true proportion of…

Q: A random selection of 625 students from Karabük University Faculty of Business Administration was…

A:

Q: Of 400 employees selected randomly from one company, 18.25% of them commute by carpooling. Construct…

A: The sample size n = 400. The probability p is 0.1825 The absolute value of Zα/2 is 1.96 using the…

Q: Due to a concern regarding the presence of a disease known as Horse Chestnut Bleeding Canker…

A:

Q: Calculate 95% confidence intervals for the proportion of dwellings in this city that use oil for…

A: It is given that  Sample size = 1000 Favourable cases, X = 228 Sample proportion, p^ = 228/1000 =…

Q: Construct a 95% confidence interval for the true average anual salary earned by all employees of…

A:

Q: According to a report by the Agency for Healthcare Research and Quality, the age distribution for…

A:

Q: a simlpe random sample of 8 college freshmen were asked how many hours of sleep they typically got…

A: Box plot can be used to find the outlier. Box plot: Software procedure to draw box-whisker plot…

Q: According to a reputable source, the average annual salaries of men and women over the age of 25 who…

A: Given information: x¯1=58102x¯2=41804n1=180n2=195σ1=3180σ2=3890 a) 99% confidence interval for the…

Q: A local health centre noted that in a sample of 400 patients, 80 were referred to them by the local…

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Q: A recent survey showed that from a sample of 500 packages delivered by a Postal Service,480 were…

A:

Q: A recent GSS reported that the 600 females had a mean of 7.5 close friends (a=8,4) and the 575 male…

A: The null and alternative hypotheses are   The test statistic is given by   p-value = 0.0131…

Q: A survey found that out of 234 workers, 158 said they were interrupted three or more times an hour…

A:

Q: A: Interpret the confidence interval B. Name two changes the employers. of Could make to reduce the…

A: Based on a random sample of 500 employees, a 95% confidence interval for the proportion of employees…

Q: In a study conducted by some researchers, 82 people were randomly assigned to listen to rap music or…

A: we have given that sample size n=82 ,point estimate xbar=0.176 and standard error =0.968

Q: A researcher collected a random sample of n = 46 squirrels and found 6 with a broken tail. Find a…

A: From the provided information Sample size (n) = 46, x = 10 The sample proportion can be obtained as:

Q: A machines are used for filling plastic bottles with a certain net volume. Quality engineer found…

A: Given that  N 1= 80 bottles N 2 = 64 bottles And we hfve to find 95% CI

Q: From a sample of 2412 Jawas, 1013 said they had recently sold a stolen droid to a moisture farmer.…

A: We want to find the 99%CI for population proportion (p) Given  X=1013, n=2412 ɑ=0.01

Q: Stanford University conducted a study of whether running is healthy for men and women over age 50.…

A:

Q: A physician wanted to estimate the mean length of time  that a patient had to wait to see him after…

A: Solution: Let X be the waiting time. From the given information, x-bar=30 minutes, s=9 minutes and…

Q: Men diagnosed with cancer were randomly assigned to either undergo surgery or not. Among the 338 men…

A: given data  n1 = 338   x1 = 15p^1 = x1n1 = 15338 = 0.0444 n2 = 335    x2 = 20p^2 = x2n2 = 20335 =…

Q: company manufactures a certain over-the-counter drug. The company samples 80 pills and finds that…

A: We have given that  Sample size n = 80 Sample mean = 325.5 Standard deviation s=10.3 90%confidence…

Q: A sample of 36 different payroll departments found that the employees worked an average of 242.5…

A: given data sample size (n) = 36sample mean ( x¯ ) = 242.5sample standard deviation (s) =21.295% ci…

Q: In an experiment, 37 randomly selected drivers drove from Pontiac to Detroit at random times. The…

A: From the given information, Sample size n=37 Sample mean = 39 Sample standard deviation = 4.8

Q: A random survey of 5000 businesses was conducted by Statistics Canada. They reported an average of…

A:

Q: The police department estimated the average speed of cars along boul. St. Jean. With hidden radar,…

A: Solution: Let X be the speed of a car driving on boul. St. Jean. From the given information,…

Q: A study was done to determine whether there is a relationship between snoring and the risk of heart…

A: Given: Consider Snoring to be data set 1 and Risk of heart disease to be data set 2.…

Q: An auditor takes a random sample of 880880 invoices from the 9510 invoices relating to the…

A: GivenThe sample size n=880The mean value of sampled invoices =126Sample standard deviation =58 Since…

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.