Exercise III Suppose that 100 tires made by a certain manufacturer lasted on the average 21.819 km with a standard deviation of 1,295 km. The company wants to test the null hypothesis u - 22,000 km against the alternative hypothesis u< 22,000 km at the 0.05 level of significance. 1) Formulate HO and H1 and specify a 2) Using the text statistic.

Q: A bottler of coconut water found that adults in the US consume, on average, 75 servings of coconut…

A:

Q: According to the U.S. Department of Education, full-time graduates receive an average salary of…

A: μ=12800 n=46, x¯=13445, s=1800 α=0.05 claim is that their graduates earn more than 12800

Q: Suppose the average size of a new house built in a certain county in 2006 was 2,276 square feet. A…

A: From the provided information, level of significance (α) = 0.10 Sample size (n) = 30 Sample mean…

Q: 2. A manufacturer of sports equipment has developed a new synthetic fishing line that he claims has…

A: See the handwritten solution

Q: The student decides to conduct a hypothesis test to see if the standard deviation of the ICS issued…

A: xbar = 24 s = 3 mu = 25

Q: 3. A random sample of 130 human body temperatures had a mean of 98.25 degrees and a standard…

A: For the given data Perform t test for one mean

Q: In the past, a company used to produce 40 tons of a certain food per day on average. Now, using a…

A: Given: n= 25.0 ,x̄= 45.0 ,s= 5.0 µ= 40.0

Q: The price of a certain combo meal at different franchises of a national fast food company varies…

A:

Q: Exercise 4. According to data from the Environmental Protection Agency, the average daily water…

A: We test the null hypothesis H0:μ=243 Tested against the alternative hypothesis H1:μ&gt;243.

Q: A two-sample t-test will be conducted to investigate whether the mean number of tickets sold for…

A:

Q: In a random sample, the weights of 24 Black Angussteers of a certain age have a standard deviation…

A:

Q: A manufacturer of sports equipment has developed a new synthetic fishing line that he claims has a…

A: We have given that  Sample size n=50  Sample mean =7.8 Standard deviation = 0.5

Q: The CEO of a cable company claims that the population mean wait time for callers at a company's…

A: The aim is to find the accurate statement from the following options to evaluate the population mean…

Q: A soda manufacturer is interested in determining whether its bottling machine tends to overfill.…

A: The question is about formulation of null and alt. hypo Given : Popl. mean amount of soda contained…

Q: What are the appropriate null and alternative hypotheses?     H0 : μ ≥ 19 and H1: μ 19     H0 : μ…

A: We have given that  The assembly time is normally distributed with std. deviation 3.4 minutes. The…

Q: A manufacturer of rechargeable laptop batteries markets its batteries as having, on average, 500…

A: In hypothesis testing, type I error is the rejection of a true null hypothesis, type II error is the…

Q: Assume that the population is normally distributed and that the sample has been randomly selected. A…

A: Solution: From the given information, the sample variance is S=4.7 cm, population variance is σ=3.5…

Q: The Scottsdale fire department aims to respond to fire calls in 8 minutes or less, on average.…

A: a) As this is right tailed test, the correct hypothesis will beH0: µ ≤ 8 min vs H1: µ &gt; 8…

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A: given that,mean(x)=5.67standard deviation , s.d1=2.39number(n1)=40mean(y)=4.14standard deviation,…

Q: A new vitamin supplementation program is intended to decrease average resting heart rate in…

A: Denote μ as the population mean heart rate.   It is needed to check, whether the mean hear rate is…

Q: A company manufactures electric light bulbs whose lifetime is normally distributed with a mean of…

A:

Q: An automobile assembly line operation has a scheduled mean completion time, u, of 15.1 minutes. The…

A: Given,sample size(n)=70sample mean(x¯)=14.9standard deviation(σ)=1.2α=0.05

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

A:

Q: Assume that a simple random sample has been selected from a normally distributed population and test…

A:

Q: An inventor has developed a new, energy-efficient lawn mower engine. He claims that the engine will…

A:

Q: A physician claims that joggers’ maximal volume oxygen uptake is greater than the average of all…

A: Givensample size(n)=15Mean(x)=40.6standard deviation(s)=6α=0.05

Q: A researcher reports that the average salary of assistant professors is more than $42,000. A sample…

A: Null hypothesis: The average salary of an assistant professor is less than or equal to $42,000…

Q: The dose of Vitamin D contained in a pill is advertised to be 3000 IU. An FDA inspector measures a…

A:

Q: A new vitamin supplementation program is intended to decrease average resting heart rate in…

A: Null hypothesis: µ=68. Alternative hypothesis: µ&lt;68. Here, the sample mean, x-bar is 74.…

Q: A sample of 40 junior high students had a mean GPA of 2.8 over all their courses taken in their…

A: From the provided information, Population mean (µ) = 3.0 Sample size (n) = 40 Sample mean (x̅) = 2.8…

Q: It is believed that the average height of General Engineering (GE) students is 1.72 meters, which is…

A: Given: x¯1=1.75σ1=0.34n1=49x¯2=1.66σ2=0.3n2=36 Level of significance=α=5%=0.05

Q: A manufacturing company developed a new type of hollow block that has a mean compressive strength of…

A: Given : Claim : u = 8

Q: According to some studies, a vacuum cleaner uses an average of 46 kilowatt hours per year. If a…

A: From the given information we conduct T test for one mean.

Q: 2. A company that manufactures light bulbs claims that a particular type of light bulb will last 850…

A: μ=850σ=50X¯=810

Q: An online food delivery service in metro manila claims that the delivery time is not greater than 30…

A: Given :   Population SD (σ) = 3 Sample size (n) = 31 Sample mean (X¯) = 40 Level of significance (α)…

Q: A manufacturer of sports equipment has developed a new synthetic fishing line that he claims has a…

A:

Q: A manufacturer of chocolate topping uses machines to dispense liquid ingredients into bottles that…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: A manufacturer of rechargeable laptop batteries markets its batteries as having, on average, 500…

A: The resulting p-value is 0.1111; thus, the null hypothesis is not rejected. The consumer group…

Q: A sample of 12 concrete specimens from supplier A were tested for their compressive strength. The…

A: Given Information: Sample A: n1=12 x¯1=85 s1=4 Sample B: n2=10 x¯2=81 s2=5

Q: A manufacturer of rechargeable laptop batteries markets its batteries as having, on average, 500…

A: The resulting p-value is 0.1111; thus, the null hypothesis is not rejected. The consumer group…

Q: In a set of experiments, a physicist makes multiple independent measurements of an electric field.…

A: We want to find 95% confidence interval

Q: In a certain year, the average annual family income in the National Capital Region was P310,860 with…

A: Given information Population mean µ = P310,860 Standard deviation σ = P176,870 Sample size = 320…

Q: A random sample of 68 bags of white cheddar popcorn​ weighed, on​ average,5.12 ounces with a…

A:

Q: Golf-course designers have become concerned that old courses are becoming obsolete since new…

A:

Q: H, is less than 11 weeks. In a random sample of 92 knee surgery patients who practiced this new…

A: Solution: Given innformation: n = 92 Sample size  x= 10.4  Sample mean μ=11 Popuation mean σ=2.1…

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A: We have to create 95% confidence interval for difference in means.

Q: A bottler of coconut water found that adults in the US consume, on average, 75 servings of coconut…

A:

Q: A random sample of 40 adults with no children under the age of 18 years results in a mean daily…

A: We will solve this using formula for 95% confidence level