Suppose that the efficacy of a certain drug is 0.53. Consider the sampling distribution (sample size n = 178) for the proportion of patients cured by this drug. What is the mean of this distribution? 0.53 What is the standard error of this distribution?

Q: for the following distribution -1,5,6. what is the sample variance?

A: Given data -1,5,6

Q: Yes, because np2 10 and nqs10. What is the mean of the sampling proportion? What is the standard…

A: Hi these are two different question. As per the guidelines I am obliged to answer first question…

Q: Given a normal distribution whose mean is 590 and whose standard deviation is 74, find the…

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Q: In any symmetrical distribution, what percentile would be associated with the mean value? What…

A: For a symmetric distribution, often the mean, median, and mode all occur at the same point.…

Q: If the sample size is 36 and the population standard deviation is 24, then the standard deviation of…

A:

Q: Assume that 29% of all children in urban schools fail to graduate from high school. An SRS of 400…

A: 1. b) The mean of the sampling distribution of p^ is, μp^=p=0.29 Thus, the mean of the sampling…

Q: Assume the sample size of the population is 20,000  n = 800, p = 0.749 determine the standard…

A: Givenp=0.749n=800Assume the sample size of the population is 20,000

Q: For any distribution, what is the z-score corresponding to the mean? 01 ON This is impossible to…

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Q: Under what conditions can the mean of the sample be treated as a value that is from a population…

A: From the above data  under what conditions can the mean of the sample be treated as a value that is…

Q: consider a normal distribution, what probability is P(z>-25)?

A: P(z>-0.25) = 0.5987

Q: For a negatively skewed distribution with a mode of X = 25 and a median of 20, what is the most…

A: Given information- Mode of X = 25 Median = 20 We have to determine the most likely value for the…

Q: In a symmetric distribution with HH = 48 and standard deviation o = 3 Approximately what percent of…

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Q: Consider a normal distribution, what probability is P(Z>0.75)?

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Q: For a population with a mean of 35 and standard deviation of 7, find the sample mean of size n = 20…

A: The formula to find the sample mean is, x¯=μ+zσn From the Standard Normal Table, the value of z for…

Q: Find the mean and standard deviation of the sampling distribution of x

A: Given that sample size is n = 36 Mean = 71 And SD = 24

Q: In a sample survey taken of 450 residents of a given community, 180 of them indicated that they shop…

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Q: For the above distribution (-1,0,1), what is the sample variance?

A: Use the given data to form the excel table:

Q: the mean and standard deviation of a population are 200 and 20 respectively. suppose the sample size…

A: Given data,μ=200σ=20If n=36the mean of the sampling distribution=?

Q: Suppose the random variable xx has a normal distribution with μ=300μ=300 and σ=30σ=30. Find the…

A: Given: μ=300, σ=30.

Q: If you were to use the normal approximation for the binomial distribution with probability of…

A: From the provided information, The probability of success = p Number of trials = n

Q: Suppose the true proportion of voters in the county who support an independent candidate for county…

A: We have given that,  True proportion or probability (p) = 0.42 Then,  q= 1 - p = 1- 0.42 = 0.58 q=…

Q: Assuming a normal distribution, for a sample with M-40 and s=4, about 95% of the individuals will…

A: 32 and 48

Q: Given a normal distribution with μ=50 and σ=5​, and given you select a sample of n=100​, There is a…

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Q: Suppose male heights follow a normal distribution with μ = 178.4 cm and σ = 7.6 cm. What is the 99th…

A: It is given that the male heights follow normal distribution with mean 178.4 cm and standard…

Q: A positively skewed population has a mean of ? = 100 and a standard deviation of ? = 15. a. What is…

A: Mean of , μ = 100 Standard deviation of , σ = 15   What is the mean of the distribution of sample…

Q: which value of л would it be safe to assume the sampling distribution of Y is approximately normal?

A: here given ,  n=100

Q: In a normal distribution with mean 3 and variance 49, what are the upper and lower limit scores for…

A: From the given information, μ=3σ2=49σ=7 Given, Pa<X<b=50%PX<a=25%P(X>b)=25%

Q: For any distribution, what is the z-score corresponding to the mean?​

A: The z-score of a random variable x is defined as follows: z = (x – µ)/σ. Here, µ and σ are the mean…

Q: Suppose that the efficacy of a certain drug is 0.46. Consider the sampling distribution (sample size…

A: Given that,n = 141, p= 0.46 (a) The mean of the sampling distribution is,

Q: A group of science students plans to take an SRS of 25 days in the year to see what proportion of…

A: Given that the students plans to take a SRS (simple random sample) of 25 days in the year where 41%…

Q: . In a sample survey taken of 450 residents of a given community, 180 of them indicated that they…

A: Defines that p is true proportion of residents, who shop at the local mall at least once per month.

Q: For a normal distribution with a mean of μ = 120 and σ = 20 What range of scores would form the…

A: Solution

Q: Suppose we have 20 observations from a normal population with mean 10 and standard deviation 3. Let…

A: We know that the, if n is the number of observations, S2 is the sample variance and σ2 is the…

Q: For the following distribution -1,0,1, what is the sample variance?

A: Here the sample size is N=3 The mean of the sample is, μ=1N∑i=1NXi=-1+0+13=0

Q: For any distribution, what is the z-score corresponding to the mean?

A:

Q: Let's assume that your sample mean and sample standard deviation are the true population mean and…

A: Let μ be the population mean and σ be the standard deviation. Let X be a random variable. Then,…

Q: If you have a sample of n=25, what is the standard error if the population standard deviation =60

A:

Q: 1. What is the 90th percentile of a t-distribution when the sample size is 1?

A: According to our policy we can answer only first part for remaining please repost the question.

Q: 10. If you have a sample of n=25, what is the standard error if the population standard deviation is…

A: The standard error of a statistics is shows the standard deviation of a estimate of a parameter and…

Q: For a population with a mean of 45 and a standard deviation of 10 what is the standard error of…

A:

Q: Given a non-normal population with a variance of 25 and mean of 13. If the size of a sample is n =…

A: Assume the variable of interest is X.

Q: The average operating life of a popular brand of tablets is know to be 2000 days, with a standard…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: Which of the statements below is true about the standard error of the sampling distribution of the…

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Q: From a population of 200 elements, a sample of 81 elements is selected. It is determined that the…

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Q: The population has a mean of 30 and a standard deviation of 6. The sample size of your sampling…

A:

Q: A salesman makes initial telephone contact with potential customers in an effort to assess whether a…

A:

Q: As the sample size n increases, the standard deviation of the sampling distribution decreases.

A: The standard error (SE) of a statistic is approximately the standard deviation of a statistical…

Q: Suppose you have a distribution with a mean equal to 100, median equal to 75, and mode equal to 50.…

A: Given that  Mean =100 Median =75 And Mode=50

Q: A sample of n=10 scores has SS=74.What is the estimated standard error for the sample mean?

A: Givensample size(n)=10sum of squares(ss)=74

Q: What proportion of a normal distribution corresponds to z scores greater than -0.82?   Question 10…

A: According to the given information, we have Z score = -0.82 (Right tailed)

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.