A manufacturer claims that the mean breaking strength of safety belt for air passengers produced in his factory is 1275 kg. A sample of 220 belts were tested and the mean breaking strength was found to be 1255 with a standard deviation of 75 kg. Test manufacturer's claim at a=5% against the alternative hypothesis that the breaking strength is less than what is claimed.

Q: In a latest survey conducted by a 3rd party company, excessive intakes of sodium may lead to ulcers,…

A: The sample size is 20, sample mean is 244, sample standard deviation is 24.5.

Q: According to a dietary study, nign sodium intake may be related to uicers, stomach cancer, and…

A: Solution: Given information: n= 20 Sample size x = 244  Sample mean s = 24.5 Sample standard…

Q: A survey found that the average hotel room rate in Luzon is ₱2,400 and the average room rate in…

A: Given problem Given that   A survey found that the average hotel room rate in Luzon is ₱2,400 and…

Q: A researcher claims that the amounts of sugar in a certain brand of soft drink have a mean different…

A: Let μ denotes the population mean sugar content. The claim of the test is that the amounts of sugar…

Q: A computer manufacturer claimed that the mean weight of their laptops is 5.5 pounds. A sample of 125…

A: Given Information: Population mean (u) = 5.5 pounds Standard Deviation (s) = 1.1 pounds Sample mean…

Q: An automobile insurance company claims that its rates for teenage drivers average $470 less per year…

A: Given: population mean = 470sample size=30sample mean = 435std deviation =65

Q: An insurance company wants to know if the average speed at which men drive cars is greater than that…

A:

Q: it is claimed that personal vehicle is driven 24500 km per year. would you agree with this claim if…

A:

Q: The average standard deviation of the waiting time for a single queue is 4.7 minutes. The average…

A: The hypotheses for the test are given below: Null hypothesis: H0: σ=4.67. Alternative hypothesis:…

Q: A particular brand of tires claims that its deluxe tire averages at least 55,000 miles before it…

A: Given :

Q: A recent study of debt among college graduates reported that the average debt accumulated by…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: For a study conducted by the research department of a pharmaceutical company, 245 randomly selected…

A: Data given n1=245 , sample mean x̄1= 17.8 and s1= 4.3 n2=225, sample mean x̄2=18.2 amd s2= 3.60

Q: A psychiatrist is testing a new antianxiety drug, which seems to have the potentially harmful side…

A: Given Data: μ=72σ=12x=70n=50   H0: μ≥72 HA: μ<72   Under H0: x-μσ/n~ N(0,1)

Q: The producer of a certain medicine claims that their bottling equipment is very accurate and that…

A:

Q: A company claims that, the mean battery life of their cell phone is at least 5 hours and standard…

A: Given,sample size(n)=25sample mean(x¯)=4.8standard deviation(σ)=0.5α=0.04H0:μ<5H1:μ≥5

Q: A hospital administrator believes that the standard deviation of the number of people using…

A:

Q: On a science assessment test, the scores of a random sample of 22 eighth grade students have a…

A: The provided information are:

Q: anufacturer claims that their bulb had a better performance with an average life span of 40 months…

A: Given: China Population mean μ1 =40 Population standard deviation σ1=3.5 x1 = 42 X1 ~ N (40, 3.52)…

Q: A job placement director claims that the average starting salary for nurse is $26000. A sample of 18…

A: Given,sample size(n)=18sample mean(x¯)=25620standard deviation(s)=680α=0.05

Q: The student academic group on a college campus claims that freshman students study at least 2.5…

A: The provided information are:

Q: For a study conducted by the research department of a pharmaceutical company, 205 randomly selected…

A: Given Sample size n1=205, sample mean x̄1=17.6, s1=sample standard deviations=5.3,  n2=sample size…

Q: According to a recent study, if a person smoked, the average number of cigarettes smoked per day was…

A:

Q: A tool company claims that the mean number of defective screws they produce per box is 72. The mean…

A:

Q: A recent study of 1,215 randomly selected middle school students revealed that the average number of…

A: From the provided information, Mean (µ) = 180 minutes Standard deviation (σ) = 45 minutes X~N (180,…

Q: In a particular community, it is claimed that the mean household water usage for a particular month…

A:

Q: An insurance company wants to know if the average speed at which men drive cars is greater than that…

A:

Q: The average grade of 64 students selected to test the claim that the students in the Business…

A: Given: n=64, x=72 and p-value=0.03. The test is to test:H0:μ=70vsH1:μ>70   So, it is right tailed…

Q: The mean height of 50 male students who showed above-average participation in college athletics was…

A: Let μ1 denotes the population mean of male students who participate in college athletics, and μ2…

Q: A recent study of debt among college graduates reported that the average debt accumulated by…

A: x1 = 27800 x2 = 11200 n1 = 80 n2 =245 s1 = 2087 s2 = 2101

Q: For a study conducted by the research department of a pharmaceutical company, 245 randomly selected…

A: Given  n1=245, x̄1=17.8, s1=4.3  n2=225, x̄2=18.2, s2=3.6

Q: The police department of a U.S. city reported that the mean number (μ) of auto thefts per…

A:

Q: A job placement director claims that the average starting salary for nurse is $25000. A sample of 15…

A:

Q: In the past, patrons of a cinema complex have spent an average of $5.25 for popcorn and other…

A: Given Information: In the past, patrons of a cinema complex have spent an average of $5.25 for…

Q: The manufacturer of a particular brand of tires claims that its deluxe tire averages at least 50,000…

A:

Q: A CHED commissioner claims that the average cost of one year's tuition for all private colleges in…

A: Given that sample size n = 15 Sample mean = 31080 Sample SD = 400 Level of significance = 0.01

Q: The mean height of 50 male students who showed above average participation in College athletics was…

A:

Q: According to a dietary study, high sodium intake may be related to ulcers, stomach cancer and…

A:

Q: I would like the solutions for parts a-e

A: Hey, since there are multiple subparts posted, we will answer first three question. If you want any…

Q: Kurtis is a statistician who claims that the population mean annual salary of an employee in…

A: Test hypothesis:Denote the population mean annual salary of an employee in the city of Yarmouth as…

Q: A recent study of 100 social workers in a southern state found that their mean salary was $23,000…

A: a). Sample1- sample size=n1=100 sample mean=$23000=x1 population mean=μ1 s1=$2100 Sample2- sample…

Q: A microwave company claims that their microwaves can pop popcorn in under 2.25 minutes. After 134…

A: Ho: their microwaves can pop popcorn in under 2.25 minutes.  H1: their microwaves can not pop…

Q: The manufacturer of the X-15 steel-belted redial truck tire claims that the mean mileage the tire…

A: Hi! Thank you for the question As per the honour code, We’ll answer the first question since the…

Q: It is claimed that personal vehicle is driven 24500 km per year. Would you agree with this claim if…

A: Given data: Population mean = 24500 Sample size = 100 Sample mean = 28000 Sample standard deviation…

Q: A job placement director claims that the average starting salary for nurse is $26000. A sample of 18…

A: Yes, There is enough evidence to reject the directors claim at 5% l.o.s.

Q: An editor for a large book distributor claims the mean time required to write a textbook is at least…

A:

Q: In a particular community, it is claimed that the mean household water usage for a particular month…

A: Hypothesis testing is conducted for the parameters of the population like population mean,…

Q: In a certain city, the average 20- to 29-year old man is 69.8 inches tall, with a standard deviation…

A: For man:mean(μ)=69.8standard deviation(σ)=3.0and X=75For woman:mean(μ)=64.3standard…

Q: An insurance company wants to know if the average speed at which men drive cars is greater than that…

A: Givenn1=27Mean(x1)=72s1=2.2n2=18x2=68s2=2.5α=1%

Q: A survey in San Diego was given and found that the mean commute time in 2014 was 26.5 minutes. A…

A: