Prove that for a random sample of size n, X, X2 X, taken from a finite population s - (, - i) Σ n i=1 (*) is not unbiased estimator of the parameter o? but n - 1 i=1 is unbiased. - x

Q: For the set of scores 5,10,10,15,25 calulate the mean, median,mode,range variance, and standard devi...

A: We have given that data  5,10,10,15,25 Mean = sum of all observations/total number of observations  ...

Q: Question 34 Someone is mortal (H- people; M- mortal) O vx (Hx - -Mx) O vx (Hx - Mx) 3x (Hx &-Mx) O a...

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Q: Deon wants to advertise how many chocolate chips are in each Big Chip cookie at his bakery. He rando...

A: We have given that,  Sample mean (x̄) = 10.8, standard deviation (s) = 1.1 and sample size (n) = 79 ...

Q: Suppose a basket of goods and services has been selected to calculate the CPI and Year 1 has been se...

A: CPI for year 3 = (Cost of basket in year 3 / Cost of basket in year 1) * 100  (Here base year is yea...

Q: The alpha level that a researcher sets at the beginning of the experiment is the level to which he w...

A: The alpha level is also known as type I error. 

Q: scatterplot of two variables x and y, the correlation is positive. A particular point has an x value...

A: From the given information we find the correct Option.

Q: Consider a game of rolling a single die, with the outcome as the random variable X. A player gains $...

A: apply the simple concept of expectation and define the random variable   X as proposed.

Q: Does data reduction and balancing the target variable eliminate skewness?

A: In AI, while building an order model with information having undeniably a bigger number of cases of ...

Q: The average amount of money spent for lunch per person in the college cafeteria is $6.52 and the sta...

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Q: For items 1 - 5, use the data below that gives the humerus bone length (in cm) and height (in inches...

A: Given information: Dive time = 73.367 - 0.426(max depth)

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe t...

A: From the provided information, Standard deviation (σ) = 77.8 Confidence level = 90% Margin of error ...

Q: About 3% of children in the United States are allergic to peanuts. Choose three children at random a...

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Q: [ Select ] The probability of any event ranges from 0 to 100 inclusive. [Select ] An impossible even...

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Q: 1. Explain why we organize data into a frequency distribution. 2. Differentiate frequency array fro...

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Q: Two chips are drawn at random and without replacement from a bag containing three blue chips and one...

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Q: How many hours are there in 18 days? Use the following information to convert this time to hours. 1 ...

A: Given: No. of days =18

Q: researcher is interested in finding a 98% confidence interval for the mean number of times per day t...

A: We have given that  Sample size n =106 Sample mean =30.3 Standard deviation =15.4 98% confidence int...

Q: 1. Suppose that two runners from team A and three runners from team B participate in a race. Further...

A: General formula of probability ,  Probability = Number of favorable outcomes Total outcomes    Formu...

Q: Express the confidence interval (35.2%,48.4%)(35.2%,48.4%) in the form of ˆp±Ep^±E. % ± ...

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Q: 10. The following table shows the probability distribution of a discrete random variable X. Find the...

A: As per our guidelines we are suppose to answer only one question.  

Q: You are interested in finding a 98% confidence interval for the average commute that non-residential...

A: Given27,27,9,26,9,26,19,18,17,25,24sample size(n)=11

Q: A certain four-cylinder combination lock has 45 numbers on it. To open it, you turn to a number on t...

A: Given that a certain four-cylinder combination lock has 45 numbers on it. To open it, you turn to a ...

Q: A popular uprising that started on January 25, 2011, in Egypt led to the 2011 Egyptian Revolution. P...

A: 1. From the given information, The population proportion is 70%=0.70 Among a random sample of 60 hig...

Q: 9. Find P(6) + P(8) A. В. 16 D. 16 10. Find the probability that X assumes a value greater than 12. ...

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Q: Consider the Venn Diagram below. A В 10 7 4 n(A) 9 n(An B) = | 10 n(BUĀ) = 4

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Q: In a robotic contest, all 30 finalists were given cash prizes. The winner was given RM3000 the secon...

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Q: Example 19-36. If Ux = a + bx+cx², prove that 3 | U,dx = 2U2 + 2 (Uo-2U2 + U4) 1 and hence find an a...

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Q: How do you classify the distribution 15, 30, 18, 18, 27, 15, 15, 30, 18 based on its mode? Multimoda...

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Q: If n=400 and X=100​, construct a 99​% confidence interval estimate for the population proportion

A: According to the given information, we have n = 400 X = 100 Confidence level = 99%

Q: Find the critical value tc for the confidence level c=0.80 and sample size n=29. tc=

A: The sample size n is 29 and the confidence level is 0.80.

Q: SUMMARY OUTPUT Regression Statistics Multiple R R-Square 0.971 A Adjusted R-Square B 30.462 Standard...

A: The t statistic  26.79 is and the standard error is 62.13.

Q: The amount of coffee that people drink per day is normally distributed with a mean of 15 ounces and ...

A: As per our guidelines we are suppose to answer three sub parts. Given,sample size(n)=16mean(μ)=15sta...

Q: Consider the following data. Period 1 rate of return -6.0. Period 2 rate of return -8.0. Period 3 ra...

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Q: Question 9: There are three roofing companies that service a small community. Al's Roof Repair gets ...

A: Given , Al's Roof Repair gets 45% of the roofing jobs. i.e. P(Al's) = 0.45 Bob's Better Building get...

Q: Assume that a sample is used to estimate a population mean μμ. Find the 90% confidence interval for ...

A: We have given that  Sample size n =39 Sample mean =74.7 Standard deviation =19.7

Q: A newsgroup is interested in constructing a 90% confidence interval for the proportion of all Americ...

A: The random variable X follows normal distribution. The number of successes is 433. The sample size i...

Q: Question 3: A partial tree diagram is provided. The missing probabilities are indicated by lower cas...

A: Given tree diagram ,

Q: how to I solve a using single linear Regression in excel or any excel method? I am struggling to und...

A: Formula: Let X be the size and Y be the rent. Excel Procedure: Enter X and Y data in Excel Go to D...

Q: There are two major tests of readiness for college, the ACT and the SAT. ACT scores are reported on ...

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Q: A recent survey found that 30% of IRSC students plan to go on a vacation after graduation. Suppose 5...

A: Solution: Let X be  the number of students that plan to go on a vacation after graduation.  The prob...

Q: Find the median for the given sample data. Listed below are the amounts of time (in months) that the...

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Q: A frequency distribution is shown below. Complete parts (a) and (b). The number of televisions per h...

A: Solution:  Let X= The number of televisions per household in a small town  The frequency distributio...

Q: Suppose you have a distribution with a mean equal to 100, median equal to 75, and mode equal to 50. ...

A: Given that  Mean =100 Median =75 And Mode=50

Q: One thousand raffle tickets are sold at P100 each for a prize of a colored television values at P15,...

A: Given that  Number of raffle tickets sold (n) = 1000 Each ticket price = P100 Price of the prize = P...

Q: A survey asks: Which online services have you used in the last month: • Twitter • Facebook • Have us...

A: Formula : P(A u B) =  (P(A) + P(B) - P(A n B) 

Q: The following nine observations were drawn from a normal population: 27, 19, 20, 24, 23, 29, 21, 17,...

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Q: Question 5: One of the symptoms of the flu is an elevated pulse rate. Pulse rates (in beats per minu...

A: One of the symptoms of the flu is an elevated pulse rate. Pulse rates (in beats per minute) for n = ...

Q: The variable Z is normally distributed with mean 0 and standard deviation 1. Find the value a such t...

A: Given that Z~ N ( 0,1 )  P(Z < a) = 0.24 a = ?

Q: Answer A, B , and C please! Show work!

A: Given : n = 12 p = 0.30  

Q: 5. Refer to the following table First Event Second Event Al A2 A3 Total 11 B1 4 14 29 B2 24 10 41 To...

A: Given that data table      First event     Second event  A1 A2 A3 Total  B1 4  11 14 29 B2 ...