A manufacturer of air conditioners seeks to ensure that their air conditioners are efficient enough that they will use no more than 2800 watt/hr under typical usage. The quality control department has tested a sample of 63 air conditioner units and found an average energy use of 7000 watts/hr. From previous tests, it can safely be assumed that the population standard deviation is 10000 watts/hr. Use the p-value approach and a 0.01 level of significance to test to see if the air conditioners are using too much energy.   What is the P value?

Q: A brewery distributes beer in bottles labeled 32oz. The local Consumer Association randomly selects…

A: Given  Population mean μ=32, sample mean x̄=31, n=sample size=30, population standard…

Q: The chamber of commerce of a Florida Gulf Coast community advertises that area residential property…

A: State the hypotheses.

Q: A tire manufacturer has been producing tires with an average life expectancy of 26,000 miles. Now…

A: As per our guidelines we can solve first three sub part of question and rest can be reposted.…

Q: Before accepting a large shipment of bolts, the director of an elevator construction project checks…

A: Consider that μ is the population mean tensile strength for the bolts.  Null hypothesis: H0: μ =…

Q: To compare the battery life of Duracell versus Energizer batteries, a sample of 140 Duracell…

A: Given: n1 = 140 X1 = 345 S1 = 95 n2 = 125 X2 = 280 S2 = 86 α = 0.01 Formula Used: Test-statistic t =…

Q: A factory manufacturing light emitting diode LED bulbs claims that their light bulbs last for 50,000…

A: A confidence interval is an inference method which gives the range of plausible values of the…

Q: A local utility company claims that the monthly electricity bills of its customers are among the…

A: Given data: Significance level  = 0.1 Claim: An energy analyst believes that the average monthly…

Q: A company which produces batteries claims that the life expectancy of their batteries is at least 90…

A: Given Information: Claim: The life expectancy of batteries is at least 90 hours. Sample size n=40…

Q: A particular manufacturing design requires a shaft with a diameter of 21.000 ​mm, but shafts with…

A: Note: Hi there! Thank you for posting the question. As there are multiple sub parts, according to…

Q: The CEO of a large financial institution claims that, on average, their clients invest more than…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A: Empirical reules:1)68% of observations falls within the first standard deviation (µ ± σ)2)95% within…

Q: A particular manufacturing design requires a shaft with a diameter of 21 000 mm, but shafts with…

A: The mean is 21.002 mm and the standard deviation is 0.006 mm.

Q: A food company is concerned that its 16-ounce can of sliced pears is not being filled correctly. The…

A: State the hypotheses That is, the mean weight is equal to 16 ounces. That is, the mean weight is…

Q: A particular manufacturing design requires a shaft with a diameter of 24.000 mm, but shafts with…

A:

Q: A particular manufacturing design requires a shaft with a diameter of 21.000 mm, but shafts with…

A: Press 2ND and VARSChoose normalcdf

Q: At the 0.05 level of​ significance, is there evidence that the mean life is different from 7,543…

A: Solution: Given: Sample mean is = x= 7243 and the known population standard deviation is σ = 1080…

Q: The local police department attempted to estimate the average vehicle speed along a strip of the…

A: Let X denote the average vehicle speed. Given, X~N36, 16 average speed of n = 4 cars is measured to…

Q: The amount of money raised by Clayton State teams for the Statistics Games is normally distributed,…

A: As per our guidelines we are suppose to answer only one question. Given,mean(μ)=$360standard…

Q: A company produces electrical devices that are operated by thermostatic control. The standard…

A: Given Sample Size , n = 20 Sample standard deviation = 3.36 Significance level = 0.1

Q: A particular manufacturing design requires a shaft with a diameter of 24.000 mm, but shafts with…

A:

Q: The piston diameter of a certain hand pump is 0.4 inch. The manager determines that the diameters…

A:

Q: A sports equipment company develops a type of synthetic fishing line which is claimed to have an…

A: One sample z-test is used to test the difference between sample mean and population mean when the…

Q: The average expenditure per student (based on average daily attendance) for a certain school year…

A: Computation of test statistic value: Sample size is greater than 30 and the population standard…

Q: A telecommunications company claims that households receive an average of 40 telephone calls per…

A: From the given information, μ=40 calls σ=5 callsn=35x=36α=0.10

Q: Is a weight loss program based on exercise just as effective as a program based on diet? The 50…

A: Given information- For sample 1 Exercise program- Average, X1-bar = 28 pounds Standard deviation, s1…

Q: A trucking firm claims that the weights of trucks it sends over a municipal road is 25,000 kg. Test…

A: Given : Claim : The weights of trucks it sends over a municipal road is 25,000 kg.

Q: The piston diameter of a certain hand pump is 0.4 inch. The manager determines that the diameters…

A: Note:- All the given answers are correct. I am also getting the same answer Given data Piston…

Q: The supervisor of a production line believes that the average time to assemble an electronic…

A: Given data, μ=14 x=11.6 σ=3.4n=14z=?

Q: A survey conducted in Mega Manila with a sample of 350 gasoline stations found that the price…

A: According to the empirical rule [Also known as 68-95-99.7 rule]. Therefore, the probability that…

Q: An industrial sewing machine uses ball bearings that are targeted to have a diameter of 0.75 inch.…

A: Note:- 1) As per our policy, we can answer only three subparts of a question. Please make a new…

Q: In a sample of 50 business trips taken by employees in the HR department, a company finds that the…

A: Test statistic is 2.05 Critical value is 2.57

Q: A particular manufacturing design requires a shaft with a diameter of 19.000 mm, but shafts with…

A: Here, X: The diameter of a shaft ~ N(19.004, 0.0042). Then,X~N(19.004,0.0042)⇒Z=X-19.0040.004~N(0,1)

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

A:

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

A:

Q: In a mid-size company, the distribution of the number of phone calls answered each day by each of…

A: Given information: The distribution of the number of phone calls answered each day is bell-shaped…

Q: A dairy farm uses the somatic cell count (SCC) report on the milk it provides to a processor as one…

A: Denote μ as the population mean SCC of all milk produced.

Q: An IT consultancy in Singapore that offers telephony solutions to small businesses claims that its…

A: Given: Sample sizen=25Sample meanx¯=70.2Sample standard deviations=8.4

Q: A textile mill company is investigating a new drapery yarn, which the company claims have a mean…

A:

Q: The average expenditure per student (based on average daily attendance) for a certain school year…

A: State the hypotheses Since, the direction of tail is not given it has been assumed as two tail test.…

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 physical plant at the main campus of a large state university recieves daily requests to replace…

A:

Q: A dairy farm uses the somatic cell count (SCC) report on the milk it provides to a processor as one…

A: Claim : The mean SCC of all milk produced at the dairy exceeds that in the previous report, 210,250…

Q: The piston diameter of a certain hand pump is 0.4 inch. The manager determines that the diameters…

A: Test for Population Standard Deviation Chi-Square Test : Chi-Square Test is used to test the…

Q: what is your conclusion concerning the null hypothesis?

A: Test is that whether the averageamount spent on trips taken by the salesepartment are higher than…

Q: The piston diameter of a certain hand pump is 0.4 inch. The manager determines that the diameters…

A:

Q: Statewide, social workers average 10.2 years of experience. In a random sample, 203 social workers…

A: Given information: μ=10.2, x=8.7, s=0.52, n = 203 Determine the null hypothesis and an alternative…

Q: A company which produces batteries claims that the life expectancy of their batteries is 90 hours.…

A: Given that, Population mean (μ) = 90 sample mean (x¯) = 87 sample size (n) = 40 population standard…

Q: The owner of a coin-operated hot coffee machine has received claims that there is an error in his…

A: Given: x¯=7.93s=0.38n=46 Hypothesis: Null hypothesis: H0: μ=8Alternative hypothesis: H1: μ<8 The…

Q: An auto manufacturer claims that its new 4-cylinder Hybrid auto with manual shift averages 50 mpg…

A: Computation of test statistic value: The population standard deviation is unknown. Thus, in order to…

Q: A quality-assurance inspector periodically examines the output of a machine to determine whether it…

A: n = 35 xbar = 2.025 u = 2 s = 0.07