was predicted that a country will have an elderly population​ (65 and​ older) of 7,387,000 in the year 2050 and that this will be 21.6​%

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A: Given Inormation: Population proportion (p) = 0.77  Sample proportion (px) = 0.74  Sample size (n) =…

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Q: The daily demand for milk (in gallons) at Gillis Groceryis N(1,000, 100). How many gallons must be…

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Q: An education researcher claims that 62% of college students work year-round. In a random sample of…

A: Given information Hypotheses is  Ho : p = 0.62 Ha : p =/0.62 X = 186 n = 300 Phat = x/n = 186/300 =…

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A: Given,The average time to load a truck is 15 minutesand A random variable X~exponential…

Q: L. Suppose that we have a normally distributed process such that u=40 and o=3. Within 1 o Within 2 o…

A: Assume, X be the random variable representing the process measurements.  It is mentioned that X…

Q: Suppose that an average of 30 customers per hour arrive at Shwapno and the time between arrivals is…

A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…

Q: Ackerman and Goldsmith (2011) report that students who study from a screen (phone, tablet, or…

A: Given claimStudents studying from an electronic screen had exam scores that are significantly…

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Q: 2. An independent research group is interested to show that the percentage of babies deliver through…

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Q: A. The winning time is -0.05503 seconds.., O B. The winning time is 0.05503 seconds. O C. The…

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Q: 117. In a certain class it was found that 70% of the students passed in half-yearly examination, 30%…

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Q: A research center claims that at least 30% of adults in a certain country think that their taxes…

A: Given claim is,At least 30% of adults in the country think that their taxes will be audited .

Q: Find the probability that in a sample of 75 divorces, the mean duration (age) of the marriages is at…

A: From the given information, let X be the age of marriages. Number of divorces considered in the…

Q: Let N(t) be the percentage of a state population infected with a flu virus on week t of an epidemic.…

A: The percentage estimated population would be N(4)=N(3)+N'(3) As(N'(3)=N(4)-N(3)4-3=slope So…

Q: A company that manufactures video cameras produces a basic model and a deluxe model. Over the past…

A: Ans  .    Let B be the event associated with basic model and              D  be the event associated…

Q: A random sample of 354 persons showed that 206 do not have health insurance. Calculate the point…

A: Given data,n=354x=206p=?

Q: 3 The number of days ahead travelers purchase their airline tíckets can be modeled by the average…

A: Exponential Distribution: Let 'x' be a continuous random variable is said to follow Exponential…

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A: Let the time spent by each customer be denoted by 'X'. X~Exp110 The PDF for the exponential…

Q: On January 1, research on hypertension starts with 2,000 30 to 40-year-old males of which 120 are…

A: The research on hypertension starts with 2,000 of 30 to 40 year old males are considered in which…

Q: 2. At the bank teller there are two agents. At agent 1, the time to complete service in minutes…

A: Given that the time to complete service in minutes for two bank teller agents distributed as Agent…

Q: A research center claims that 30% of adults in a certain country would travel into space on a…

A: One - sample proportion test :  To test : H0 : P = P0            against  H1 : P ≠ P0  or P < P0…

Q: A sample of 113 mortgages approved during the current year showed that 32 were Issued to a…

A: The null and alternative hypothesis is, The type of test is right tailed test Critical value: Using…

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Q: medical researcher says that ould be required to be vaccinated. In a random sample of 300 adults in…

A: We have given that  Sample size n= 300 Population proportion p =76%=0.76 Sample proportion p^=…

Q: Given that 7.0% of the population of Canada have blood type O-negative, calculate the probability…

A: Given that 7.0% of the population of Canada have blood type O-negative so the probability of getting…

Q: A companies revenue is determined by R(n)=2^n(n^2+5). Where n is the number of months.  What is the…

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Q: Sampling 4 pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24…

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Q: (a) What percent of the SAT verbal scores are less than 650? (b) If 1000 SAT verbal scores are…

A: Given: μ=515, σ=110 The corresponding z-value needed to be computed: The probability that s scores…

Q: Suppose 51% of the population has a retirement account.   If a random sample of size 530 is…

A: Using ‘normal approximation conditions’ check whether the proportion can be approximated to normal…

Q: A research center claims that 26% of adults in a certain country would travel into space on a…

A: When the value of the sample is 30 or more than 30 then we consider the test as a large sample test.…

Q: Suppose that an average of 30 customers per hour arrive at Shwapno and the time between arrivals is…

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Q: Assume that an environmentally transmitted disease is introduced to a community. The proportions of…

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Q: Suppose a sample consists of the numbers 1, 2, 3 ... 2n, the probability of choosing an integer k is…

A: Given: PXi=logk      i=1,2,3,.....2n

Q: Suppose that the counts recorded by a Geiger counter follow a Poisson process with an average of tv…

A: The counts follow a Poisson process with an average of two counts per minute. Two counts per minute…

Q: (i) Test the claim that p is less than 0.301. Use ? = 0.05.   (a) What is the level of…

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Q: t al. (2013) asked st- then to predict the p 0 minutes later. Tab d its CI, between the Table 7.5…

A: Given, M1 = 48% = 0.48 S1 = 23% = 0.23 n1 = 21 M2 = 25% = 0.25 S2 = 21% = 0.21 n2 = 21   Thumb Rule:…

Q: n company, in order to s had an average retu average return on inv any that has a high rel tegy?

A: to find which company has been playing a riskier strategy we will use the coefficient of variation…

Q: n a study of 48 cases of a certain diseases, it was noted that 17 cases developed complications, a…

A: Total a 17 31 48 b 170 310 480 Total 187 341 528 Test for independence: Chi-Square…

Q: When it is sunny, Joe's ice cream truck generates a profit of $547 per day, when it is not sunny,…

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Q: In a recent survey, 72% of post-secondary graduates indicated that they expected to earn at least…

A: # proportion of graduate who earn atleast $6000/month is p=0.72  Margin of error=0.052  No of…

Q: A certain phone model has a 16% of dying after 5 years, a 23% of dying after 6 years, and a 49% of…

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Q: g on the prior mean is

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Q: Q3.a. Find out the variance of first n natural numbers.

A: Since multiple questions are given first part is answered step by step explanation. Kindly repost to…

Q: 13) The following table contains data about the perfomance of a couple of mutual funds with various…

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Q: Ecording to a census company, 7.1% of all babies born are of low birth weight. An obstetrician…

A: P value = .003

Q: e 17-2. In a random sample of 400 persons from a large population, 120 are females. Can it be said…

A: Introduction - Null distribution Test statistic z=p^-p0p01-p0n where ,  p0=population proportion…

Q: What is the symbol for the residual? Op O a OR² Ορ Or Op ов Ομ ΟΧ Os² S 00² None of the above / does…

A: Correct symbol for residual is e  hence answer is none of above / does not have a symbol.  In…