In a survey of 200 adults, the U.S. Public Interest Group found that the credit reports of about 79% of these adults contained errors.  Assume that the 200 adults make a simple random sample of all adults in the Unites States. given that P(hat)=x/n what is the numerical value of x?

Q: A random sample of n = 25 observations is drawn from a population with mean 10 and standard…

A: Given, A random sample of n = 25 observations is drawn from a population with mean 10 and standard…

Q: A simple random sample of size n=14 is obtained from a population with μ=67 and σ=19.   Assuming…

A: the PDF of normal distribution is = 1/σ * √2π * e ^ -(x-u)^2/ 2σ^2standard normal distribution is a…

Q: Let Xi, X2, f(x;e)- ee *I c0.00 (x). Find a l00y or percent confidence interval for the the…

A:

Q: 1. In a random sample of 400 observations from a population whose variance is o²=100, we calculated…

A:

Q: For a particular population, a sample of n = 4 scores has a standard error of 6. For the same…

A: Given data,If n=4 then σx =6 If n=16 σx=?

Q: If all the possible random samples withn 36 scores are selected from a normal population with u- 80…

A: sample mean=E(X¯)=E∑i=1nXi/n=∑i=1nμn=nμn=μsample mean=μ=80

Q: Random samples of size 150 are collected from each of two populations to test the hypotheses  The…

A: The p-value can be calculated as: P-value =2*P[Z>2.23]

Q: In a random sample of n = 500 drivers, 115 individuals say that they never wear a seatbelt when…

A: The random variable X follows binomial distribution. The sample size is 500. The number of successes…

Q: In a test of Ho: µ = 100 against Ha: µ 100, a sample of size 80 produces z = 0.8 for the value of…

A: Given: z =0.8 The null and alternative hypothesis are: H​0​​: μ=100 H​a​​: μ≠100 It is a two tailed…

Q: A random sample of n = 25 individuals is selected from a population with μ = 20, and a treatment is…

A:

Q: In a study whether there is a difference between the average heights (in inches) of adult females…

A: Given  n1=120, sample mean x̄1=62.7, s1=2.5, n2=150, sample mean x̄2=61.8, s2=2.62

Q: A treatment is administered to a sample selected from a population with a mean of u = 34 and a…

A: Given : Mean (m1) =34 SStandard deviation (s) =8 d=0.00 We need to find mean for the treated sample…

Q: random sample of n = 16 scores is obtained from a population with a mean of μ = 80, and a treatment…

A: Given data,  n = 16 μ = 80 M = 82 s 2 = 1600 s=40 what is the estimated d?

Q: A simple random sample of size n= 39 is obtained from a population with u = 69 and o = 16. a) What…

A: (a) Correct options:

Q: A researcher collects two independent random samples of sizes n₁ = 25 and n₂ = 30, and computes the…

A: Given,n1=25and n2=30

Q: A random sample of  n= 4 individuals is selected from a population with μ = 35, and a treatment is…

A: a. A sample of 4 individuals is selected from a population with mean 35. The sample mean and sum of…

Q: Show that the mean x of a sample of size n from the distribution. e-x/0 f (x)= 0<x< 0 elsewhere is…

A: Here given f(x) which is the distribution of exponential distribution.  We know the mean and…

Q: A sample of n = 49 scores with M = 43 is selected from a population with µ = 40 with σ = 21. What is…

A: Mean = 40 Standard deviation = 21 Sample size = 49 Sample mean = 43

Q: A random sample of n = 16 scores is obtained from a normal population with a mean of u = 100 and a…

A: Let us consider the random sample denoted by X which follows a normal population with a mean 100 and…

Q: A random sample of n 25 is taken from a normally distributed population with a mean u= 80 and…

A: Given:

Q: For a population with o= 15, how large a sample would be needed to have a standard error of 3 points…

A:

Q: to take a simple random sample of size n from the production line. If he were to double his sample…

A: Chocolate bars produced by a certain machine are labeled 8.0 ounces. The distribution of the actual…

Q: Consider a normal population with µ = 50 and σ = 6. A sample size of at least which size needs to be…

A: The population standard deviation is 6 and margin of error is 2 or less.

Q: Suppose that two independent random samples of sizes 11 and 16 were taken from normal populations…

A: Normal Distribution: A continuous random variable X is said to follow Normal distribution with…

Q: A random sample of n = 12 individuals is selected from a population with μ = 70, and a treatment is…

A: Given that -Sample size (n) = 12 Population mean (µ) = 70 Sample size (M) = 74.5 Sum of squares (SS)…

Q: A treatment is administered to a sample of n = 9 individuals selected from a population with a mean…

A: Given: n=9, μ=80, σ=12, d=0.50 Cohen’s d effect size is calculated as follows: Cohen's…

Q: Given a normally distributed random variable with mean 18 and standard deviation 2.5, the value of k…

A: The given values are, μ=18,σ=2.5 The value of k such that P(x&lt;k) = 0.3192 is,

Q: Let X1, X2, . .., X, be a random sample from a normal distribution with mean µ and variance o². (a)…

A: ..

Q: In a random sample of n = 600 drivers, 108 individuals say that they never wear a seatbelt when…

A: We have given that,  For part a and b ,  Favorable cases (X) = 106 and sample size (n) = 106 Then,…

Q: a) How much difference is there between the mean for the treated sample and the mean for the…

A: a) The sample size is 25, with sample mean 22.2, sums of squares is 384, and the population mean is…

Q: If a random sample of size n=160 has x¯=105 and s=9.5, find the standard error of the statistic.…

A:

Q: 3. For a population with µ = 80 and o = 20, the distribution of sample means based onn = 16 will…

A:

Q: In a test of hypotheses of the form Ho : u = 0 versus Ha : u <0 using a = 0.01, when the sample size…

A:

Q: A sample of n=25 scores is obtained from a population with u=70 and o=25. If the sample mean is…

A: Z-score: The z-score value is a numerical measurement that describes a value of the relationship to…

Q: For a continuous random variable x, the population mean and the population standard deviation are 69…

A: Given data For a random variable x The mean is 69 and the standard deviation is 15 sample of 16…

Q: A random sample of n = 25 individuals is selected from a population with μ = 20, and a treatment is…

A: a)The mean of the original sample is 20 (µ) and the mean of the treated sample is 22.2(M). The…

Q: A random sample of n 16 individuals is selected from a population with μ 70, and a treatment is…

A:

Q: A random sample of size 36 is taken from a population with mean u= 17 and standard deviation o= 6.…

A:

Q: Suppose X1, .., Xn, for n > 1, are sampled independently from a distribution with mean u and…

A: a. From the given information, EXi=μVXi=σ2 a. Consider, EX1=μEX1+Xn2=12EX1+EXn…

Q: 2. Suppose the PMF of the random variable X is px(x) =p(1-p)*(0,1...(x) where p is a constant…

A:

Q: For any population, a z-score of -2.00 is a more extreme score than a z-score of +1.00. TRUE OR…

A: Z-score: The z-score determines the relation of the individual values with mean of distribution. The…

Q: For a population with o = 12, how large a sample is necessary to have a standard error that is less…

A:

Q: A sumple from a normal population with mu = 50 and sigma = 6 of M=48.20, . the sample…

A: Given Information: Population mean μ=50 Population standard deviation σ=6 Sample mean (M) = 48.20…

Q: To test H0​: μ=50 versus H1​: μ<50​, a random sample of size n=23 is obtained from a population…

A: Given dataHo: μ=50Ha:μ&lt;50n=23x=46.6s=11.8

Q: A kinesiologist claims that the resting heart rate of men aged 18 to 25 who exercise regularly is…

A: Group 1: Regular exercise x1 = 63, n=40 and s=1.0 Group 2 : No Regular exercise x2 = 71, n=30 and…

Q: A sample of n = 25 scores is selected from a normal population with a mean of u 80. However, the…

A:

Q: For a population with o = 12, how large a sample is necessary to have a standard error that is less…

A:

Q: In a random sample of n = 600 drivers, 168 individuals say that they never wear a seatbelt when…

A: Givenn=600x=168

Q: A sample of n = 16 scores is selected from a normal population with σ = 32. If the sample mean of M…

A: Given that, Sample size = 16 Standard deviation = 32 Sample mean = 81 Z score = -1.75

Q: For a particular population, a sample of n = 4 scores has a standard error of 6. For the same…

A: For a population, sample size is 4 and standard error is 6.

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.