3. An inspector wants to test if the Coke-litro-filling machine is defective by getting a random sample of 22 Coke litro from different batches filled by the machine. It is found out that the sample mean of the random sample is about 1.09 liters with a sample standard deviation of 0.15 liters. What is the null and alternative hypothesis of the test?  a. Ho: x̄ = 1 liter versus Ha: x̄ > 1 liter  b. Ho: µ = 1 liter versus Ha: µ < 1 liter  c. Ho: µ = 1 liter versus Ha: µ ≠ 1 liter  d. Ho: µ = 1 liter versus Ha: µ > 1 liter

Q: Tamara is a physician who works in a city. She has a discussion with her colleague who believes that…

A: The correct options are: (A) and (C). Explanation:It is provided that the p-value is between 0.005…

Q: We wish to know if we can conclude that the mean daily caloric intake in the adult rural population…

A: From the provided information, Sample size (n) = 500 Sample mean (x̄) = 1985 Sample standard…

Q: A random sample of 82 eighth grade​ students' scores on a national mathematics assessment test has a…

A: From given data we have : n=82 μ=280,σ=37

Q: ur environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone…

A: “Since you have posted a question with multiple sub parts, we will provide the solution only to the…

Q: A random sample of 76 eighth grade students' scores on a national mathematics assessment test has a…

A: given data claim : μ &gt; 285n = 76x¯ = 292σ = 30α = 0.15

Q: The mean systolic blood pressune of all healthy adults is less than than 121 mm Hg Sample data: For…

A:

Q: A statistics professor takes a random sample of 25 students who have taken a special statistics…

A: From the provided information, Sample size (n) = 25 Sample average (x̄) = 86 Sample standard…

Q: What is the mean of the distribution of sample means? What is the standard deviation of the…

A: Given that, A population is Normal with the parameters: μ=217.4 and σ=33.8 Sample size (n) = 245

Q: Lithium carbonate is a drug used to treat bipolar mental disorders. The average dose in…

A: State the hypotheses.

Q: et x be a random variable representing the area (in square feet) of single-family houses in a town.…

A: given data, n=31claim:μ=2160X¯=2095s=163.7value of test statistice=?

Q: mean of 50 ounces and a standard deviation of 8.81 ounces. 8 homes with children are surveye Let X =…

A: As the population distribution is normal, it can be said that the distribution of the sample with…

Q: Scores on a certain "IQ" test for 18-25 year olds are normally distributed. A researcher believes…

A: Here in this problem the null hypothesis is the mean of IQ scores is less than 110 and the…

Q: The concentration of benzene was measured in units of milligrams per liter for a simple random…

A:

Q: The concentration of benzene was measured in units of milligrams per liter for a simple random…

A: Let,  μ1 :  the population mean benzene concentration for untreated water and  μ2: the population…

Q: The P-value for this hypothesis was found to be:

A: The test statistic is, z=x¯-μσn=78-682025=104=2.5 The test statistic is 2.5.

Q: A test is made of Ho: μ = 100 vs. Ha : μ ≠ 100. Given a sample size of 100 and its mean of 97 and…

A:

Q: A confused Stat Professor claims the mean height of men is equal to 66". His students take a sample…

A: we have given that  The  sample mean is \bar X = 68.5Xˉ=68.5 and the sample standard deviation is s…

Q: 4. A random sample of 25 "Quarter Pounders" yields a mean weight of X = 0.208 pounds, with a sample…

A:

Q: 7. An education analyst believes that the average SAT scores for women exceed the average SAT scores…

A: From the provided information,

Q: A small amount of the trace element selenium, from 50 to 200 micrograms (ug) per day, is considered…

A:

Q: The concentration of benzene was measured in units of milligrams per liter for a simple random…

A:

Q: A statistics teacher taught a large introductory statistics class, with 500 students having enrolled…

A: Given: μ=78σ=10n=25x¯=83

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A: a)To calculate the sample size needed to have a 90% chance of detecting a significant change in DBP…

Q: Suppose the mean IQ score of people in a certain country is 100. Suppose the director of a college…

A: Degrees of freedom = n-1 = 39 - 1 = 38 P(t &lt; 2.07 ) = 0.977   [using  Excel function…

Q: . "It is claimed that a car is driven on the average less than 18100 kilometers per year with a…

A:

Q: A random sample of 75 eighth grade students scores on a national mathematics assessment  test has a…

A: Population mean (µ) = 270Standard deviations (σ) = 30Sample size (n) = 75Sample mean (x̅) =…

Q: Assume that the mean weight for American men in their twenties is 180 pounds with a standard…

A: The provided sample mean is Xˉ=175\bar X = 175 and the known population standard deviation is…

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A:

Q: Suppose we want to test H0: μ ≥30  versus  H1: μ < 30.H0: μ ≥30  versus  H1: μ < 30. If we do not…

A:

Q: Suppose that a randomized comparative experiment studies the effect of diet on blood pressure.…

A:

Q: What is the value of my test statistics?

A: Given that Sample size n = 36 Sample mean = 12.5 Population SD = 2 Level of significance = 0.05

Q: A statistics teacher taught a large introductory statistics class, with 500 students having enrolled…

A: Given, The null and alternative hypothesis. and population mean and standard deviation. also Sample…

Q: At 5% level of significance, does the sample provide enough evidence to prove that the mean weight…

A: Given that, Sample size (n) = 64 Sample mean (X¯) = 166 lb Standard deviation (σ) = 25 lb Level of…

Q: random sample of 75 eighth-grade students score's on a national mathematics assessment  test has a…

A: Given

Q: 20. A researcher reports a between subjects ANOVA, F(3, 40) = 2.96. State the decision to retain or…

A: 20.  At 5% level of significance we reject the null hypothesis for this test     21.  Yes, test…

Q: Suppose we wish to test the hypotheses Ho: u= 10 versus Ha: u<10, where u represents the mean age of…

A:

Q: Scores on a certain "IQ" test for 18-25 year olds are normally distributed. A researcher believes…

A:

Q: a. Conduct the appropriate hypothesis test at the 0.01 significance level. b. What would a Type-1…

A: Given : SD=10 n=10 Population mean=76 Sample mean =85

Q: random sample of 100 students is taken from a larger population of students in a multi-lecture…

A: Solution: Given information: n=100 Sample size x= 57.5 Sample mean μ=56 Population mean σ=5…

Q: Scores on a certain "IQ" test for 18-25 year olds are normally distributed. A researcher believes…

A: So we have population mean μ=190 and the researcher claim is that the average IQ score for students…

Q: The concentration of benzene was measured in units of milligrams per liter for a simple random…

A:

Q: Scores on a certain “IQ" test for 18-25 year olds are normally distributed. A researcher believes…

A: Given We have given p-value = 0.337 and level of significance α=0.05

Q: The blood platelet counts of a group of women have a bell-shaped distribution with a mean of 257.9…

A: Solution: Let X be the blood platelet counts of a group of women. From the given information, X…

Q: 1. A random sample of 50 medical school applicants at a university has a mean raw score of 31 with a…

A: Given that  Sample size n =50 Sample mean =31 Standard deviation =2.5

Q: A veterinary researcher takes an SRS of 60 horses presenting with colic whose average age is 12…

A: Given n=60

Q: An ecologist is studying the impact of local polluted waters on the growth of alligators. The length…

A: Length of adult male alligators follows a normal distribution with µ and standard deviation 2. n…

Q: A one-sample test of H0: μ = 125 against Ha: μ > 125 is carried out based on sample data from a…

A: The population standard deviation is 15.

Q: uppose a researcher wants to test if the average diastolic blood pressure in Irish-Americans is…

A: Given data,n=30Population mean μ=70sample mean is x=73sd is s=3test statistic t=?