If in a village actually involved by anthrax, 70 per cent of the goats are attacked and pei cent have been inoculated with vaccine ; what is the lowest percentage of the inoculated that must have been attacked?

Q: A population has a mean μ=87 and a standard deviation σ=30. Find the mean and standard deviation of ...

A: In question, Given that A population has a mean μ=87 and a standard deviation σ=30.  Then we'll find...

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Q: The amount of pollutants that are found in waterways near large cities is normally distributed with ...

A: As per guidelines expert have to answer first question three subparts only dear student please uploa...

Q: The mean weight of 500 male students in a certain college is 151 lbs. and the standard deviation is ...

A: Let X denote the weights of male students in a certain college. Given that X follows N(mean = 151, S...

Q: If the arithmetic mean of two items of a series is 12.5. and G.M. is 10, what is the difference of t...

A: if the arithmetic mean of two items(a and b) of a series is 12.5 and G.M. is 10,i.e. a+b2=12.5 ⇒  a+...

Q: Let X,, X2, ..., X, be i.i.d. standard normal random variables, i.e., with mean 0 and variance 1, an...

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Q: llustration 21.(a) Calculate Spearman's coefficient of rank correlation for the following data:- 75 ...

A: Given data is X 53 98 95 81 75 61 59 55 Y 47 25 32 37 30 40 39 45

Q: If the arithmetic mean of two items of a series is 12.5 and G.M. is 10, what is the difference of th...

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Q: A random survey of enrollment at 2020 community colleges across the United States yielded the follow...

A: Solution-: We find, (A) (i) x¯=?      (ii) sx=?       (iii) n=?        (iv) n-1=? (B)  Construct a 9...

Q: Suppose, Tonmoy, Sneha and Rashed are three friends who applied for a job in a company where the com...

A: Given probability distribution is   P(T) =2/3 P(S) =1/3 P(R) =4/7

Q: Length of life (hours) 1,000–1,199 The following table gives the length of life of 400 radio tubes: ...

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Q: Write all the possible values of random variable A: Product of two numbers taken from two boxes cont...

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Q: A population has a mean μ=80 and a standard deviation σ=8. Find the mean and standard deviation of a...

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Q: Given : log10 654 = 2.8156 log10 658 = 2.8182 log10 659 = 2.8189 log10 661 = 2.8202 Find say, Lagran...

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Q: The observed values of a function are respectively 168, 120, 72 and 63 at /the four positions 3, 7, ...

A: To find the best estimate of a functional value corresponding to a particular value of the independe...

Q: Let X, X2, . .. , X, be i.i.d. standard normal random variables, i.e., with mean 0 and variance 1, a...

A: A continuous random variable Z is said to follow Standard Normal distribution if its probability den...

Q: For large U.S. companies, what percentage of their total income comes from foreign sales? A random s...

A: “Since you have posted a question with multiple sub-parts, we will solve first three subparts for yo...

Q: Find out by interpolation from the following data the number of workers earning $ 24 or more but les...

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Q: A discrete random variable X can assume the following values, 42, 44, 46, 48, 50. Its probability di...

A: X 42 44 46 48 50 P(X) 0.3 a 0.2 0.1 0.15  

Q: Use the normal distribution of SAT critical reading scores for which the mean is 505 and the standar...

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Q: The numbers examined, the mean weight and the standard deviation in each group of examination and tw...

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Q: A market with 168 operating firms has the following distribution of average number fworkers in vario...

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Q: Boxes of cereal are filled by a machine. Tests of the machine’s accuracy show that the amount of cer...

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Q: Continuous Uniform Distribution. A random variable X has the Continuous Uniform Distribution in the ...

A: Given: X is following the uniform distribution that is lying between 10 and 21.

Q: . The scores of individual students on a mathematics test have a normal distribution with mean 18.6 ...

A: here use basic of sampling distribution  

Q: Please answer each of the questions in each of the items and refer to its instructions. I-Use the hi...

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Q: For each variable, identify its type (qualitative, quantitative). If it is a quantitative variable, ...

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Q: An urn contains nine blue balls and five yellow balls. If four balls are selected randomly without b...

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Q: The population consists of the ages of 5 children, as follows: 2,5,8,11, and 14. Construct a samplin...

A: Let us assume all possible random samples of the same size are considered that have been drawn from ...

Q: Compute general fertility rate and gross reproduction rate from the data given below : Age group of ...

A: Given : Proportion of female births = 46.2%

Q: The U.S. Geological Survey compiled historical data about Old Faithful Geyser (Yellowstone National ...

A: From the provided information,

Q: A paper pulp company has discovered their cost and revenue functions for each day: C(x) = 2x? - 250x...

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Q: (a) The first of two sub-groups has 100 items with mean 15 and standard deviation 3. the whole group...

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Q: A combustion system has two burners, each with its own fuel inlet with its own shut-off valve. The p...

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Q: Question 11 of 15 The positive standard deviations are located on the left side of the normal curve....

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Q: If the arithmetic mean of the following data is 28, find the missing frequency. Then find median als...

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Q: Number 1: The serum cholesterol levels of a population of 12 to 14 year olds follow a normal distrib...

A: Let X denotes the cholesterol levels of population  X ~ N(162, 28)  

Q: Find the value of Mode from the following data : Size of item Frequency 100-110 110-120 6 120-130 20...

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Q: Suppose that the amount of time that students spend studying in the library in one sitting is normal...

A: As per guidelines expert have to answer first question three subparts only dear student please uploa...

Q: True or False 5:4re the following events independent? Answer Cnd qiue a recison. Ihe first ega in a ...

A: Two events are said to be independent if the occurrence of any one of them is not affected by the oc...

Q: 4. The average public high school has 468 students with a standard deviation of 87. If a random samp...

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Q: a. Find a sufficient statistic for 0. b. Is your statistic in (a) also complete? Show/justify.

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Q: If X and Y are independent random variables with variances Var(X) = 5 and Var(Y)= (a) find the varia...

A: Given  V(x)=5, V(y)=3,  Z=-2x+4y-3  X and Y are independent   

Q: 3. Use the method of moment to estimate the parameter 0 for the density f(x;0) Ij0.01 (x) based on a...

A: In method of moments we equate sample moments to population moments to get the required estimate of ...

Q: If X and Y are independent RVs, then E(YIX) - F(Y) nd F(Y10

A: X and Y are independent then joint distribution of X and Y is  f(x,y)=f(x)f(y)   

Q: The acccompanying data set lists the retirement ages for 24 doctors. Use the data to construct a cum...

A: For the given data Complete the cumulative frequency distribution table below. Use the minimum data ...

Q: A bag contains 30 balls numbered from 1 to 30. One ball is drawn at random. Find the probability tha...

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Q: Example 5. Calculate 5-yearly and 7-yearly moving average of the data given below to obtain trend va...

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Q: Given the bivariate data: 5 3 2 Y 6 2 1 (a) Fit a regression line of Y on X and thence predict Y if ...

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Q: A man and a woman got married and decided to have 5 children.   What is the probability that the c...

A: A man and a woman got married and decided to have 5 children.∵P(girl)=P(boy)=0.5P(the couple will ha...