A random sample of n = 16 communities in eastern New Mexico gave the following information for people under 25 years of age. x, is the rate of hay fever per 1000 population for people under 25. x1 = 109.5 and s1 eastern New Mexico gave the following information for people over 50 years old, x2 = 99.36 and s2 = 15.41. A random sample of n2 = 14 communities in %3D = 11.57. Assume that the hay fever rate in each age group has an approximately normal distribution. Do the data indicate that the age group over 50 has a lower hay fever rate? Use alpha = 0.05

Q: 5. A sample of n 36 from a population of u = 50 and o = 18 has a mean M = 47 the z-score for the…

A:

Q: Suppose that a random sample of size 20 is taken from a normal distribution with unknown mean and…

A: The prior Standard deviation is obtained below:

Q: 4. ACT composite scores are normally distributed with a p= 21. A sample of 25 students is randomly…

A:

Q: What is STANDARDIZED EFFECT estimates Cohen’s d?

A: Cohen’s d is an effect size which is used to indicate the difference between two sample means…

Q: We have two random variables X and Y. The standard deviation of X is 0.34365 and the standard…

A: r=correlation=0.97 (2 decimal places)

Q: (b) A scientific group claims that the true population mean u is more than 7 meters. (i) What is the…

A: Givenclaim is that the true population mean μ is more than  7 metersMean(x)=7.3sample size(n)=16σ=1

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A: The random sampling distribution of a statistic is approximately normal and the values given in the…

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A:

Q: Samples of size n = 9 are selected from a normal population with µ = 80 with σ = 18. What is the…

A: Given information n = 9 µ = 80 σ = 18

Q: A researcher wishes to see if there is a difference in the manual dexterity of athletes and that of…

A: Given data ,Sample 1                              Sample 2Mean (x1)=87…

Q: The correlation between years of Training and income in a sample of 20 people from a certain company…

A:

Q: The variance of one sample (22 regions) = 14.29. (a=0.01) (10')

A: Given, The hypothesis to be tested is given as follows: This is a two-tailed test.

Q: 25. A population has u = 30 and o = 10. If 5 points are added to each and every score in the…

A:

Q: The director of research and development is testing a new medicine. She wants to know if there is…

A: From the provided information, The hypotheses can be constructed as:Null hypothesis: H0: µ = 309…

Q: Bob’s z-score for the last exam was 1.52 in Prof. Axolotl’s class BIO 417, "Life Cycle of the…

A: The Bob’s z-score for the last exam was 1.52.

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A: # Given random sample of size n=150 and population mean mu=24.98  and standard deviations=4.18  To…

Q: Suppose X, Y and Z are 3 random variables. The mean of X is 2. The mean of Y is 3. The mean of Z is…

A:

Q: 6. A population of scores has u = 44. In this population, a score of X = 40 corresponds to z =-0.50.…

A: GivenMean(μ)=44x=40z=-0.50

Q: A study of hemoglobin (Hb) levels among adult males at high altitude (conducted in La Paz, Bolivia).…

A:

Q: lion (ppb) is considered safe for agricul- This well is tested on a regular basis fc of - = 7.3ppb…

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Q: A population of scores has u = 46. In this population, a score of X = 39 corresponds to z = -1.40.…

A: Given that, population mean mu=46, X=39 Z=-1.40,  We have to find population standard deviation…

Q: What proportion of the data has values between 330 and 345?

A: It is given that  Mean, μ = 345 Standard deviation, σ = 30 Z-Score, z = ( X - μ )/σ

Q: distribution with a mean of μ =41 and a standard deviation of σ = 4 is transformed into a…

A: According to guidelines we solve first three subparts when given multiple subparts.Please post the…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.