When a random variable X follows binomial distribution, the probability of success on one trian is equal to 0.6, and the number of trials is eual to 120, What is the variance of X ?

Q: The mean we ght of an adult is 76 kilograms with a variance of 100 if 142 adults are randomiy…

A: Given,mean(μ)=76standard deviation(σ)=10 sample size(n)=142

Q: A racing car consumes a mean of 103103 gallons of gas per race with a variance of 3636. If 3838…

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Q: A sample of n=4 scores has SS=60. what is the variance for this sample?

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Q: The usage time of a telephone belonging to a specific brand may be looked upon as a random variable…

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Q: Fourty six percent of the students in a class of 150 are planning to graduate school, Find the…

A: Answer: From the given data, Sample size(n) = 150 Forty six percent of the students are planning to…

Q: A racing car consumes a mean of 107 gallons of gas per race with the variance of 49. If 46 racing…

A: The following information has been provided: The population mean is μ=107. The sample variance is…

Q: The burning life (in hours) of electric lamps installed in a street of a city follows a normal…

A: Given: μ = 120 hours = 60×120 minutes=7200minutes σ2 = 54000 minutes.   Formula Used: Z-score = X-μσ…

Q: Suppose that the probability of giving birth to a male is 0.5. Out of 1000 families with five…

A: as per Bartleby guideline expert have to answer first question only dear student please upload other…

Q: The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is…

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Q: Suppose a batch of metal shafts produced in a manufacturing company have a variance of 99 and a mean…

A: Sample size n=72Population mean=207Population variance=9Population standard deviation=√variance=√9=3

Q: For an analysis of variance comparing four treatment means with a separate sample of n = 8…

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Q: Two separate samples, each with n = 14 individuals, receive different treatments. After treatment,…

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Q: An analysis of variance produces SSb = 30, SSw = 60, F-ratio with df = 2, 15.      For this…

A: From the provided information, SSb = 30 and SSw = 60 Degree of freedom (k - 1) = 2 And (n - k) = 15

Q: In an industrial setting, process steam has been found to be normally distributed with an average…

A: Given: The process steam in the industrial setting is normally distributed. The average value is…

Q: Two samples are selected from a population, and a treatment is administered to the samples. If both…

A: Introduction: It is given that the two samples are collected separately, from the same population;…

Q: For tests of Homogeneity of Variance the preferred outcome is to reject the Null hypothesis. True…

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Q: A sample of n = 9 scores has SS = 200. What is the variance for this sample?

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Q: a batch of rods produced at a plant have a mean length of 151 mm, and a variance of 64. If 116 rods…

A: Z= x¯-μσ/n~ N(0,1)

Q: An organizational psychologist measures levels of job satisfaction in a sample of 30 participants.…

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Q: A medical researcher wishes to see whether the variance of the heart rates (in beats per minute) of…

A: The null and alternative hypotheses are given below. H0: σ12 = σ22 H1: σ12 ≠ σ22 The test statistic…

Q: Suppose a batch of metal shafts produced in a manufacturing company have a variance of 6.25 and a…

A: Suppose the random variable x defines the diameter of metal shafts.

Q: Assume that you have a binomial experiment with p = 0.4 and a sample size of 120. What is the…

A: Given that, From binomial experiment, Probability, p = 0.4 Sample size, n = 120

Q: The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is…

A:

Q: A racing car consumes a mean of 103103 gallons of gas per race with a variance of 3636. If 3838…

A: The Z-score of a random variable X is defined as follows: Z = (X – µ)/σ. Here, µ and σ are the mean…

Q: A bridge can resist a weight up to 104 metric tons. The mean weight of a car is 4 tons with a…

A: Given information: μ=4, σ2=9x=104*1.102311=114.64 tonsn=2450

Q: Suppose that house prices in a city (measured in thousands of dollars) are normally distributed with…

A: It is required to find the z-score for a house price of 333 units.

Q: If the probability of a defective bolt is 1/9 . Find 1) the mean 2) the variance for the…

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Q: he mean cost of a five pound bag of shrimp is 47 dollars with a variance of 36. If a sample of 43…

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Q: what happens to the F-statistic if two variances are different?

A: The two variances are different hence the F-statistic are as follows,

Q: what test is used to determine whether two population means are different when the variance are…

A: The test that is used to determine if the two population means are different when the population…

Q: An electrical firm manufactures light bulbs that have a length of life that is normally distributed…

A: Obtain the Z-score for the random variable X equals 778. The Z-score for the random variable X…

Q: Suppose, you are running an experiment that has two outcomes, namely 'success' and 'failure'. You…

A: given,  The experiment is having two outcomes which are success and failure and the outcome of one…

Q: One sample from an independent-measures study has n=16 with a variance of 65, the other sample has…

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Q: Two separate samples, each with n = 14 individuals, receive different treatments. After treatment,…

A: # Given : two samples n1=n2=14  and sample varience S1^2=1638  and S2^2=1620  then to find pooled…

Q: How to Reconstruct the Variance step by step?

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Q: A national study that examined attitudes about antidepressants revealed that approximately 70% of…

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Q: A sample of 60 items from population 1 has a sample variance of 8 while a sample of 40 items from…

A: Given S1^2=10 S2^2=14

Q: Suppose, you are running an experiment that has two outcomes, namely 'success' and 'failure'. You…

A: It is given that we are running an experiment that has two outcomes, namely 'success' and 'failure'.…

Q: A researcher uses an analysis of variance to test for mean differences among three treatments with a…

A: According to the given information, we have Given that a researcher uses an analysis of variance to…

Q: Suppose, you are running an experiment for 1024 times where the probability of success in a single…

A: Given: The number of times an experiment runs is n=1024. The probability of success in a single…

Q: The director of research and development is testing a new medicine. She wants to know if there is…

A: Solution:  Given information: n= 45 Sample size  x= 323    Sample mean μ= 318   Population mean σ2=…

Q: Two separate samples, each with n = 14 individuals, receive different treatments. After treatment,…

A: