The population of a city has decreased by 32% since it was last measured. If the current population is 11,900, what was the previous population?

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Q: A survey is commissioned to study the weight of NFL players at certain positions.  Of the 188 active…

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Q: D. Directions: Find the rejection region for each hypothesis test based on the information given. 1.…

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A: Given that: Sample size, n = 160 Sample mean, x¯=78 Sample standard deviation, s = 2

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Q: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval…

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Q: 1) Researchers are curious whether the age a couple gets married affects the number of children they…

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A: Use EXCEL to obtain the value correlation coefficient r:   EXCEL procedure:   Go to EXCEL Go to…

Q: 1. * 1. E(x) = 4ß and Var(x) = 43² True O False 2. * 2. x~N (4B, 41²) 25 True False

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Q: u = 3, o2 = 9, P(-6 < X<12) a. Determine P(u – ko < X<u+ ko) 1 - 1/k?

A: According to the Chebyshev's theorem, 1-(1/k²) of the observation fall within k standard deviation…

Q: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval…

A: Solution-: Given: n=130, x=73, c=0.98 Our aim to find 98% C.I. for the population proportion.

Q: =(x, y) = { √x² +²2²2²,0 < x < 1,0 < y < 2, elsewhere. 0, (x)= 2x (x + 1/3), h(y)= 1/3 + y/6. g.…

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Q: There is a claim that playing e-sport increase food intake. The following table (Table 2) shows data…

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Q: A sales manager for a large department store believes that customer spending per visit with a sale…

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Q: Determine the expected value of X. Determine the expected value of Y. Determine the expected value…

A: EX=∫X*g(X)dX=∫01X2XX+13dX=∫2X2X+13dX=∫2X3+2X23dX=2X4401+23X3301=12+29=0.722…

Q: e table below gives the estimated world population (in billions ars 1980 1990 1997 2000 2005 2011…

A: Given See the above table in form of X=years Y=population

Q: roughly bell-shaped with a mean of $31 and standard deviation of $3. Estimate how much a typical…

A: From the given information we find the 95% confidence interval.

Q: Determine the t critical value for a two-sided confidence interval in each of the following…

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are…

Q: The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget…

A: Solution-: Given: μ=45,σ=4 We want to find, (a) 68% of the widget weights lie between ….oz and …..oz…

Q: A survey is commissioned to study the weight of NFL players at certain positions. Of the 188 active…

A: It is given that the mean is 219.3 and the population standard deviation is 6.8.

Q: Question 6 The new study also carried out a test to determine whether the population proportion of…

A: Hi there! Thanks for posting the question. Since there are multiple questions, please repost the…

Q: A certain Instructor believes that the grades of students is related to the number of progress…

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Q: Consider a sample of 50 football games, where 28 of them were won by the home team. Use a 0.01…

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Q: Use the sample information x¯x¯ = 43, σ = 6, n = 13 to calculate the following confidence intervals…

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Q: For a standard normal distribution, find: P(-2.76 <z<2.32)

A: The z values are -2.76 and 2.32.

Q: The mean value of land and buildings per acre from a sample of farms is $1700, with a standard…

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Q: 1. Calculate the mean, variance (s²), standard deviation (s), z-scores, and t-scores of the…

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Q: 1. A population has the numbers 2, 4, 6, 8, 10, 12. Then two samples are taken at random and without…

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Q: Find the mean of the distribution given below: (2 pts) Table 1. Distribution According to Number of…

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Q: A class of 18 pupils consist of 11 girls, 4 of whom are left-handed, and 7 boys, only one of whom…

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Q: What criterion must a portfolio meet in order to be in the minimum variance set? Contrast the…

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Q: The results of a common standardized test used in psychology research is designed so that the…

A: Given Mean=155 Standard deviations=30 X=194

Q: Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E.…

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Q: The consumption function captures one of the key relationships in economics. It expresses…

A: Solution Given information is The consumption function captures one of the key relationships in…

Q: (a) A random sample of 10 houses in a particular area, each of which is heated with natural gas, is…

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

Q: Given that P(A) = 0.7, P (A/B) = 0.7, P(A∩B) notation same as P (A and B) = 0.42, find  the…

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

Q: Assume that a sample is used to estimate a population proportion p. Find the 90% confidence interval…

A: It is given that sample size (n) is 288 and p-hat value is 0.389.