the data table contains waiting times of customers at a bank, where customers enter a single waiting line that feeds hree teller windows. Test the claim that the standard deviation of waiting times is less than 1.3 minutes, which is the standard deviation of waiting times at the same bank when separate waiting lines are used at each teller window. Use a significance level of 0.025. Assume that the sample is a simple random sample selected from a normally distributed population. Complete parts (a) through (d) below. E Click on the icon to view the data. a. Identify the null and alternative hypotheses. Choose the correct answer below. IO A. H,: o=1.3 minutes OB H,: o=1.3 minutes HA o 1.3 minutes HA G<1.3 minutes O C. H o<1.3 minutes OD H,: o2 1.3 minutes HA G=D1.3 minutes HA O<1.3 minutes

Q: The weight of corn chips dispensed into a 16-ounce bag by the dispensing machine has been identified…

A: Given: Mean, μ=16.5 ounces Standard deviation, σ=0.2 ounce Sample size, n=100 X~N (16.5, 0.2) For…

Q: Systolic blood pressure levels above 120 mm Hg are considered to be high. For the 100 systolic blood…

A: Givensample size(n)=100Mean(x)=122.70000standard deviation(s)=15.35933significance level(α)=0.10

Q: A tire manufacturer claims that its tires have a mean life of at least 50000 kms. A random sample of…

A: There are two approaches used to make conclusions. They are critical value approach and p value…

Q: With individual lines at the checkouts, a store manager finds that the standard deviation for the…

A: Null Hypothesis: H0: The standard deviation of the waiting times using a single line is equal to 5.2…

Q: A consulting agency was asked by a large insurance company to investigate if business majors were…

A:

Q: An automotive repair shop has determined that the average service time on an automobile is 130…

A: Given that, An automotive repair shop has determined that the average service time on an automobile…

Q: A sociologist will conduct a two-sample t-test for a difference in means to investigate whether…

A: n1=32                                 n2=28x1 =55000                         x2 =58000S1=3500…

Q: A simple random sample of n=23 professors at a local community college have a mean course evaluation…

A: Solution:Null and alternative hypotheses:Null hypothesis: µ = 4Alternative hypothesis: µ ≠ 4Test…

Q: A college entrance exam company detemined that a score of 20 on the mathematics portion of the exam…

A: Given: Sample size (n) = 250 Sample standard deviation (s) = 3.3 Sample mean x¯=20.3 Hypothesized…

Q: A college entrance exam company determined that a score of 20 on the mathematics portion of the exam…

A: Given Information :  A college entrance exam company determined that a score of 20 on the…

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: The amount of time that sales managers devote to their jobs per week is normally distributed with a…

A:

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

A: Null and alternative hypotheses: Let σ is the standard deviation of sheath thickness. Null…

Q: The piston diameter of a certain hand pump is 0.7 inch. The manager determines that the diameters…

A: From the provided information, The sample size (n) = 29 Sample standard deviation (s) = 0.0045

Q: A coin-operated drink machine was designed to discharge a mean of 9 ounces of coffee per cup. In a…

A: Given: n = 20 Sample mean = x bar = 8.95 sample standard deviation = s = 0.13 Level of significance…

Q: A college entrance exam company determined that a score of 25 on the mathematics portion of the exam…

A: Given,  n=200 , μ=25 , x¯=25.5 , s=3.5 a part The hypothesis will be H0: μ=25H1: μ &gt;25  This is a…

Q: A human resources manager at a company based in a major city wants to determine whether there is a…

A: A statistical hypothesis is a hypothesis which can be evaluated on the basis of observing a…

Q: The average weekly earnings of bus drivers in a city are $950 with a standard deviation of $45.…

A: The formula for calculating the standard error of the sample is,

Q: 0.007 inch. After recalibrating the production​ machine, the manager randomly selects 26 pistons…

A: The manager determines that the diameters are normally​ distributed, with a mean of 0.4 inches and a…

Q: im confused on this porblem

A: (a)The null hypothesis and alternative hypothesis:From the given information, the claim of the test…

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: A statistician chooses 27 randomly selected dates, and when examining the occupancy records of a…

A: Givensample size(n)=27Variance(s2)=34.34conidence level=95%

Q: A coin-operated drink machine was designed to discharge a mean of 9 ounces of coffee per cup. In a…

A: Consider that μ defines the population mean discharge amounts of coffee per cup.

Q: A leasing firm claims that the mean number of miles driven annually, u, in its leased cars is less…

A: Givensample mean(x)=11346standard deviation(σ)=3280sample size(n)=14α=0.10 given claim is:-a leasing…

Q: The data table contains waiting times of customers at a​ bank, where customers enter a single…

A:

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

A: Given, Population standard deviation σ=0.005 Sample size n=29 Sample standard deviation s=0.0043…

Q: A study was conducted by researchers to study the difference between the volumes of rainfall in two…

A: If a population is normally distributed then the sampling distribution of sample mean also follows…

Q: A/A batch of 2500 resistors is normally distributed, with a mean resistance of 1.5 ohms and a…

A: Note:-Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: Based on historical records, the director of Manna Corporation claims that the average productivity…

A: The random variable productivity follows normal distribution. The population standard deviation is…

Q: A human resources manager at a company based in a major city wants to determine whether there is a…

A:

Q: A coin-operated drink machine was designed to discharge a mean of 9 ounces of coffee per cup. In a…

A: Givensample size(n)=18sample mean(x)=8.84standard deviation(s)=0.25α=0.05

Q: Each day, a fast-food chain tests that the average weight of its “two-pounders” is at least 32…

A: Given: Sample mean, x=30.8 Population SD, σ=3 Here, population standard deviation is known, so…

Q: 1. In crash tests at 5 miles per hour, the mean bumper repair cost for 14 randomly selected small…

A:

Q: A college entrance exam company determined that a score of 25 on the mathematics portion of the exam…

A: Given,sample size(n)=150sample mean(x¯)=25.3standard deviation(s)=3.3α=0.05H0:μ=25H1:μ&gt;25

Q: A researcher conducted a research at a local high school wherein she found out that, among the 150…

A:

Q: When 50 people used a certain diet for one​ year, their weight losses had a standard deviation of…

A: Null Hypothesis: H0: The amounts of weight loss have a standard deviation equal to 6.0. Alternative…

Q: A 2013 study was conducted to determine the energy requirements in non-obese men and women for the…

A:

Q: f a random sample of 100 vehicles is selected, calculate the standard error of the sample means

A: Concept and formula: The standard error is known as the estimated value of the standard deviation of…

Q: Suppose that the average distance PGA tour players can drive a golf ball off the tee is 295.3 yards…

A: From the provided information, Sample size (n) = 10 Sample mean (x̅) = 295.44 Population standard…

Q: Assume that women have diastolic blood pressure measures that are normally distributed with a mean…

A:

Q: A 2013 study was conducted to determine the energy requirements in non-obese men and women for the…

A: As the population standard deviation is known, we will use z test. The null and alternative…

Q: The mean tar content of a simple random sample of 25 unfiltered king-size cigarettes is 21.4 mg,…

A: The following information has been provided: Sample Mean 1 (Xˉ1)(\bar X_1) = Unfiltered King…

Q: A soft-drink bottle vendor claims that its process yields bottles with a mean internal strength of…

A: Given Mean=157 Standard deviation=3

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

A: Given dataHypothesized mean µ= 30Sample Standard deviation s = 4.4Sample mean = 29.1Sample size n =…

Q: A health specialist wants to determine the average number of hours a person exercises in a day…

A: Given information Hypothesized mean µ = 80 minutes Sample size (n) = 29 Mean x̅ = 65 minutes…

Q: A human resources manager at a company based in a major city wants to determine whether there is a…

A: Solution: It is required to find the test statistic and the p-value for the given data. it is given…

Q: A coin-operated drink machine was designed to discharge a mean of 6 ounces of coffee per cup. In a…

A: One sample t-test: One sample t-test is used to test the significance difference between population…

Q: hypotheses. Choose the correct answer below. A. H0: σ<1.9 minutes HA: σ=1.9 minutes B. H0: σ=1.9…

A: given data :…

Q: The student union is conducting a study of the sleep habits of year one and two students. A random…

A: