Assume that adults have IQ scores that are normally distributed with a mean of 102.9 and a standard deviation 20.3. Find the first quartile Q₁, which is the IQ score separating the bottom. 25% from the top 75%. (Hint: Draw a graph.) *** The first quartile is (Type an integer or decimal rounded to one decimal place as needed.)

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A: given data    standard normal distribution ,  Z~N(0,1) P(z<0.48) -  = ?

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A: Given that  Sample size n=30 Population mean=300

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Q: 7. P(-1.25 ≤ Z≤ 2.80) 8. P(Z ≤ 0.98) 9. P(1.50 ≤Z ≤ 2.75) 10. P(1.17<Z≤ 3.12)

A: Given7)P(-1.25≤Z≤2.80)

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Q: Question #3  END NEED Samples of body temperatures were collected for a group of women and a group…

A: Given: Women: Sample size n1=15 Sample mean x¯1=98.38 Sample standard deviation s1=0.45 Men: Sample…

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A: The following information has been provided: 56 75 89 47 80 65 55 78 90 59…

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A: given data,THE CONFIDENCE INTERVAL IS 17.8% ±7.8% WE HAVE TO FIND OUT THE CONFIDENCE INTERVAL in…

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A: Solution-: Given: n=23,p=0.42 We want to use the normal approximation to the binomial. Then use the…

Q: Meteorologists in Texas want to increase the amount of rain delivered by thunderheads by seeding the…

A: Solution: n= 30 Sample size μ=300 Population mean

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A: We have given that p = 70% = 0.70 n = 100

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A: GIVEN DATA uniform distribution between 0 minutes and 7 minutes x~U(0,7) P(x&gt;2.25) = ?

Q: 10. Jupiter works in a factory. He is known to make an average of 1.2 mistakes during his 8-hour…

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Q: S A coin-operated drink machine was designed to discharge a mean of 9 fluid ounces of coffee per…

A: From the provided information, Sample size (n) = 20 Sample mean (x̄) = 9.12 Sample standard…

Q: xpress the confidence interval (65.2%,83.2%) in the form of ˆp ± ME. _____% ± _____ %

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Q: One research study of illegal drug use among 12- to 17-year-olds reported a decrease in use (from…

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Q: t of 300 people sampled, 237 had kids. Based on this, construct a 90% confidence interval for the…

A: given data, n=300x=had kids=237p^=xn=237300=0.79CI=0.90α=1-0.90=0.10

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A: Given that : Confidence level =95% n=50 lower limit=13.046 Upper limit=17.598

Q: Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69.2 bpm. For a random…

A: Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69.2 bpm. For a random…

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A: Formula Used: Test-statistic χ2 = ∑O-E2E

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A: The first 20 natural numbers are1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,…

Q: A diet guide claims that you will get 120 calories in a serving of vanilla yogurt. Consumer Reports…

A: From the provided information, Sample size (n) = 14 Level of significance (α) = 0.05

Q: not type it ASAP. thanks

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Q: Samples of body temperatures were collected for a group of women and a group of men. The summary…

A: Given that, n1 = 15, sample mean for women = 98.38°F