Using a cutoff of 0.05, is it unusual for an asthma patient to be 85 years old or older?

Q: Is the difference of means significant ? The value of t for 9 degress of freedom at 5% level is 2.26

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Q: Composite scores on ACT test for the 2015 high school graduating class had mean 21.0 and standard de...

A: From the provided information, Mean (µ) = 21.0 Standard deviation (σ) = 5.5 X~N (21.0, 5.5)

Q: Q2. The Normally distributed random variable X has an unknown mean and an unknown variance, o? i.e. ...

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Q: Carbon dioxide (Coalis produced by buming 6/ fuels Such as oil and natucal gas, and has 15 been Cone...

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Q: The weights of new born black bear cubs are uniformly distributed with minimum of 245 and maximum of...

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Q: A newspaper conducted a statewide survey concerning the 2008 race for state senai newspaper took an ...

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Q: Determine the probability P (6). Round the answer to at least four decimal places.

A: Solution Given that , X has binomial distribution with parameter n=14 and p=.2 Then q=1-p=1-.02=0.80...

Q: Suppose we know that the mean score among the population of college students taking the GMAT test is...

A: given;X: the score among the population of college students taking the GMAT testpopulation mean(μ)=1...

Q: Consider the following correlations -0.9 , -0.5 , -0.2 , 0 , 0.2 , 0.5 and 0.9. For each give the f...

A: Given, the correlations -0.9 , -0.5 , -0.2 , 0 , 0.2 , 0.5  and 0.9. We need to calculate the fracti...

Q: Example 2.19 Let X be a random variable with possible values (r1, x2, ..Xn) such that P(X = x) =v i....

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Q: 4. A traffic accident witness said that the license plate number contains the letters RLH, followed ...

A: Given,The license plate number contains the lettersRLH , follwed by 3 digits and the 1st digit being...

Q: If X is a uniform random variable in (-2 , 4) and Y = X² – 4, the probability density function g() o...

A: Probability density function : A probability density function, also known as the density of a contin...

Q: To estimate µ, the mean salary of full professors at American colleges and universities, you obtain ...

A: We have given that,  Sample mean (x̄) = 73220 , standard deviation (s) = 4400 and sample size (n) = ...

Q: Every year, a major university assigns Class A to ~16 per cent of its mathematics graduates, Class B...

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Q: a) What if the person violates all 7 rules? b) What if the person never drinks alcohol and always ha...

A: Here use combination 

Q: To estimate H, the mean salary of full professors at American colleges and universities, you obtain ...

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Q: x? 0.025,7

A: We have to give that χ20.025,7 Here, degrees of freedom =7 α=0.025    

Q: Property (4) of power spectral density. Prove that the spectral density of any WSS process is non-ne...

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Q: A six-sided die is rolled twelve times. What is the probability that the die will show an even numbe...

A: Let p be the probability of getting an even number. Then p = 3/6 = 0.5 Let X denote the number of ti...

Q: Stress at work: In a poll about work, 84% of respondents said that their jobs were sometimes or alwa...

A:

Q: 27. For the item 26, if a chair chosen randomly and found to be defective, what is the probability t...

A: Let A1, A2, ... , An be n events. The events are mutually exclusive and exhaustive events with P(Ai)...

Q: < 400ml 2 400ml total Low sugar available No low sugar 45 35 80 15 105 120 Total 60 140 200

A: We use the given contingency table to find the required probability. 

Q: Now suppose one wants to assess how accurate is the approximation of une average expected score u by...

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Q: The process C is defined by C= A | B, where A and B are defined by A = a.0 B =ā.0 a. What are the th...

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Q: 3- Calculated the expected variances (o ) for each.

A: From the given information 3.   i j to ti tp σ2=(tp-to6)2 1 2 1 1 7 σ2=(7-16)2=1 1 3 1 4 7 σ2...

Q: Let X,....., X, be a random sample from the N(0, o²) distribution, and suppose that the prior distri...

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Q: Suppose we want a 90% confidence interval for the average amount spent on books by freshmen in their...

A: Given that  For 90%  confidence interval  The margin of error =2  Standard deviation=$30 We have to ...

Q: High blood pressure: A national survey reported that 34% of adults in a certain country have hyperte...

A: From the provided information, A national survey reported that 34% of adults in a certain country ha...

Q: Ten samples each of size 5 are drawn at reqular intervals from a manufacturing process. The sample m...

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Q: Given the following, determine the regression equation of : () X1 on X2 and X3 (ii) X2 on X1 and X3 ...

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Q: ample 38. The life of the bulbs produced by Companies A and B are given below : Length of life (in h...

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Q: Let X1,.. X„ be n independent random variables with PDF fx, (x) = - [A,e- if x > 0, i = 1,2, ..., n....

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Q: n = 8 a =0.05 x? in

A: Given  Level of significance=ɑ=0.05, n=8

Q: 2) The student body of 120 students wants to elect three representatives. 4) The batting order for s...

A: Cr=n!n-r!×r!nPrn=n!n-r!

Q: Mathematical Journal When do you use these formulae? z=

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Q: Determine the z-score given the following: (Express your answers in 2 decimal places) P(z<a)=0.8 P15

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Q: STATISTICS 1 100 1 1 Played Win % Current Маx Streak Streak GUESS DISTRIBUTION 1 0 2 0 3 0 4 1 5 0 6...

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Q: Find a non-linear trend equation from the following three normal equations obtained from the origin ...

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Q: Use Spearman rho to test the hypothesis at 5% level of significance in which there is no significant...

A:   Use Spearman rho to test the hypothesis at 5% level of significance in which there is no significa...

Q: Consider the random variable X that represents the number of people who are hospualized or died in a...

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Q: To encourage participation of students in various exchange pr DIR) is packaging a proposal for the A...

A: Probability sampling: It refers to the selection of a sample from a population, when this selection ...

Q: .Suppose that a basket contains 22 eggs in which seven are cracked. If three eggs are randomly selec...

A: Solution-: Given: N=22,M=7,n=3, X=3 We find, P(three cracked eggs are removed)=?

Q: asked to guess the average weight of the six watermelons by taking a random sample without replaceme...

A: Here use sampling distribution without replacement 

Q: What is the probability that the next person you meet was not born in July?

A: Here we have to calculate the probability that the next person you meet was not born in July. Assume...

Q: with cashews costing $8 per pound to obtain 140 pounds of a mixture costing $6 per pound. If the mer...

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Q: Stress at work: In a poll about work, 84% of respondents said that their jobs were sometimes or alwa...

A: We have given that p = 0.84 n = 12

Q: A random sample of 35 scores from the Gen Math examination of ABM learners is taken and gives a samp...

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Q: A population has mean u=23 and standard deviation o=7. Round the answers to two decimal places as ne...

A: In the given problem, mean (µ) = 23 and standard deviation (σ) = 7.

Q: Repeated measures study with a total n=24, and a sample mean difference score of MD=4 is obtained. I...

A: It is given that Sample size n = 24 Mean difference MD = 4 Variance of differences s2 = 216

Q: In a normal distribution with a mean of 72 and a standard deviation of 12, what percentage of cases ...

A: GivenMean(μ)=72standard deviation(σ)=12