returned within 24 hours. The Sample proportion p-hat is 99/125 = 0.792. The watchdog group wants to perform a hypothesis test against the claim that the airline is able to recover 87% of lost luggage in 24 hours. What could be used as the null hypothesis for this problem? a. The proportion of luggage recovered in 24 hours is equal to 87%. b. The proportion of luggage recovered

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: Suppose that the unemployment rate for 18- to 34-year-olds was reported to be 10.6%. Assume that…

A: Given, The unemployment rate for 18- to 34-year-olds was reported to be 10.6% based on a random…

Q: In the twentieth century, it was a common practice in Southern California for houses to be built…

A: Solution: Given information: n1= 138n2= 84x1=…

Q: Estimate the chance that the sample proportion was more than 45% using a normal approximation.

A: Given information: Given that , 40 % of the primary doctors have made claim that their patients…

Q: A consumer protection group regularly monitors gas prices in southern California.  One day (several…

A: 3.95 4.07 4.14 4.04 4 3.93 3.98 4.01 3.9 4.03 4.13 3.88 4.03 4.1 3.81…

Q: Refer to a study of the factors that lead to successful performance-based logistics projects. Recall…

A: Given information: The data for the experience for the 5 commercial suppliers is given.

Q: An article estimated that 80 percent of students at a large public university who are Facebook users…

A: According to the given information in this question, we need to identify the correct option

Q: A newly installed automatic gate system was being tested to see if the number of failures in 1,000…

A: The data is given asTruckEntry failuresExit failures1445024053355554565656255652507455184547sample…

Q: A medical geographer in Kenya is studying the distribution of an infectious strain of "sleeping…

A: Given that  Sample sizes n1=100 , n2=125 The proportion of people on a flood plain that were…

Q: The owner of Maumee Motors wants to study the relationship between the age of a car and its selling…

A: Given that

Q: A press release states that "by an overwhelming margin, Americans want to live in a sunny place."…

A: a) Define that p is the proportion of all adult Americans who would prefer to live in a hot climate…

Q: Newborn babies are more likely to be boys than girls. A random sample found 13,573 boys were born…

A: The claim of the test is there is sample evidence that the birth of boys is more common than the…

Q: Out of a sample of 38 people, 23 people enjoyed biking and 15 enjoyed running. Test the claim that…

A: Given that,  x = 23, n = 38 The sample proportion of people prefer biking is, Null and alternative…

Q: Consider a simple poll that is measuring the proportion of citizens that hold a particular political…

A:

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: If you have a 99% confidence that a population proportion is in the interval from a to b, what does…

A:

Q: A researcher wants to calculate the prevalence of Alzheimer’s among members of a specific community…

A: Solution: Given information: Margin of error = E= 0.01 Population proportion = p = 0.1073 Confidence…

Q: Most universities and colleges require an SAT score as one of the inputs to an admissions decision.…

A: It is given that the SAT scores for 10 students and their college GPAs.

Q: In an article about unusual allergies, a doctor explained that allergy to sulfites is usually seen…

A:

Q: Dr. House is leading a study to determine whether a new drug could significantly improve memory loss…

A: Dr. House is leading a study to determine whether a new drug could significantly improve memory loss…

Q: The American Academy of Pediatrics offers guidelines and recommendations for how much “screen time”…

A: Given data,No of parents n=200proportion of these parents who indicate they follow screen time…

Q: STEP 4: Calculating F value. Calculate the following Ex² = %3D SSB = SSW = Therefore, MSB = MSW %D…

A: Given that, the Land Transportation and Franchising Regulatory Board (LTFRB) wants to examine the…

Q: After reading an article using research done by the Organization for Economic Co-operation and…

A: The 95% confidence interval for p is (0.25, 0.32).

Q: In a study comparing banks in Germany and Great Britain, a sample of 145 matched pairs of banks was…

A: Given ,  d = German – Great Britain Sample mean of the difference = d¯ = 0.0518 sample standard…

Q: It is thought that 12% of all students taking a particular course received a grade of A. In a sample…

A:

Q: Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources…

A: Note: Hi there! Thank you for posting the question. Unfortunately in the sub-part(b), some required…

Q: n a study, a CSULB professor wants to estimate the average grade point averages (GPA) of all…

A: It is given that sample mean is 2.35 and the standard deviation is 1.03.

Q: A marketing manager for a cell phone company claims that more than 35% of children aged 10-11 have…

A: Assume that p is the true proportion of all children aged 10-11 that have cell phones.

Q: Why a sample size of n=100 is more likely to have a percentage of pop songs closer to the population…

A: Sample of size 32 or greater is consider as large sample .

Q: in october 1947 the gallup organization surveyed 1000 adult americans and asked are you a total…

A: We have given thatn1 = 1000 , x1 = 378n2 = 1000 , x2 = 333Significance level (α) = 0.05Now,p̂1 =…

Q: A cigarette manufacturer claims that his cigarettes have nicotine content that does not exceed 2.0…

A:

Q: The recidivism rate for convicted sex offenders is 8%. A warden suspects that this percent is…

A: Given,n=321x=22p^=xnp^=22321=0.0685α=0.01

Q: Suppose you take a sample of 25 Reese's pieces. The proportion of orange is 0.4. What is the p-value…

A: Solution

Q: The workers at drug factory took a random sample of 800 drug tablets and found that 40 of them were…

A:

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: Is the proportion of twin births among teenage mothers different from the overall figure?

A: It is given that Sample size n = 469 Number of twin births, X = 7 Level of significance = 10% = 0.10

Q: Researchers at Purdue University and Wichita State University found that airlines are doing a better…

A:

Q: A study claims that the Netherlands has the tallest adults of any country with an average height of…

A: Given :  u(population mean height)=6.14 ft. n(sample size) = 31. sample height 5.23 6.6…

Q: Can you conclude that the proportion of boys who are overweight differs from the proportion of girls…

A: Here use  proportion test for 2 sample

Q: A middle school wanted to examine if students' sense of school belongingness increased after…

A: It is wanted to be examined by the middle school whether the sense of school belongingness of…

Q: Based on the Nielsen ratings, the local CBS affiliate claims its 11 p.m. newscast reaches 52% of the…

A: Givensample size(n)=100p^=0.47

Q: A Chinese cell-phone manufacturer exclusively uses robots in one of its factories. A random test run…

A: