Scores on a certain intelligence test for children between 13 and 15 years are approximately N (96, 21). a) What proportion of children have scores above 78? b) Enter the score which marks the lowest 25% of the distribution. c) Enter the score which marks the highest 10% of the distribution.

Q: 2. The numbers of movies attended last month by a random sample of 12 high school students were…

A: data,   2,0,3,1,2,4,2,5,4,0,1,4 data in accending order:0,0,1,1,2,2 ,2,3,4,4,4,5

Q: 6TH GRADE 7TH GRAI 15 11

A:

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A: The population is the collection of responses of parents of 13 to 17 years olds.

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A:

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A: Total population size N = 600+200+400+500+300 = 2000 Number of strata h = 5

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A:

Q: 2. The numbers of movies attended last month by a random sample of 12 high school students were…

A: The modes of the data set are 2 and 4. Explanation: The mode of a set of data is the value in the…

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A: Given information: At a local university, the population mean grade points is exactly μ=75 points.…

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A: Given data,In old surveyn=1100x=374In recent surveyn=1100x=330

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A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

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A: a)The ‘percentage or %’ represents ‘divide by 100’.

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A: We have to use general set theory to find the probabilities.

Q: 5. A researcher estimates that average length of road in a city is less than 634 feet. A random…

A: X (x-xbar)^2 725 4212 621 1528.8 592 4637.6 525 18252 638 488.41 463 38848 745 7208…

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A: Using  the combination formula,   nCr= n!r!(n-r)!n=8, r=3     Substituting,  8C3=…

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A:

Q: random sample of 10 baseball players is taken to determine the characteristics of player's salaries.…

A: Given n=10 Total number 640

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A: The sample of size 3 is to be inferred from the population, which contains the given values 2, 3, 4,…

Q: 26 randomly selected students were asked the number of movies they watched the previous week. The…

A: Relative frequency = f∑f

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A: Cluster sampling We know that in cluster sampling the population is divided into 'n' groups which…

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A:

Q: It was reported that 53% of people who had coronary bypass surgery in a recent year were over the…

A: It is given that n = 15 and p = 0.53.

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A: Option a) is correct. Target population - All UoN graduate students.

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Q: a random sample of 74 people, 38 are classified as "successful" Determine the sample proportion, p,…

A: Given data,Number of people n=74Classified are successfull is 38

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Q: An article was published concerning the incidence of cardiac death attributable to earthquake in Los…

A: Hey there! Thank you for posting the question.  Since there are two questions posted, we will answer…

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A: 1)T-test (Dependent) as we are comparing the same population after one week

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A: 2 proportion z test is applicable

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A: Given information: The provided data is:   Male Female Row Total 0 5402 13310 18712 1-2 2147…