Salaries for teachers in a particular state have a mean of $ 42000 and a standard deviation of $ 5800.  a.  If we randomly select 18 teachers from that district, can you determine the sampling distribution of the sample mean? If yes, what is the name of the distribution?  The mean?  The standard error?

Q: In estimating the population mean with the population standard deviation unknown, if the sample size…

A: Given that, Population standard deviation is unknown and sample size (n) = 27

Q: The Economic Policy Institute periodically issues reports on wages of entry-level workers. The…

A: In the given case we need to determine the distribution of the average entry-level wage for male…

Q: The population standard deviation and sample standard deviation are of the same value if the…

A: Solution A population and sample standard deviation both have same unit as Population unit.

Q: Find the sample variance and sample standard deviation for the sample data 21,17,13,25,9,19,6 and 10

A:

Q: With the aid of a table, find the sample Standard Deviation of the following dataset: X = {2.2, 4.7,…

A:

Q: (a) What is the probability that a single student randomly chosen from all those taking the test…

A: Let , X→N(μ=538.6 , σ=27.2) , n=30 Our aim is to find the following :  a) b) ​​​​​​​ c)  Z-score…

Q: Use any method to calculate the sample mean, median, and standard deviation of the following sample…

A: The objective is to find the sample mean, median and standard deviation of the given sample of…

Q: The mean weight of newborn infants at a community hospital is 6.6 pounds. A sample of seven infants…

A: Sample points are 9.0,7.3,6.0,8.8,6.8,8.4,6.6. Sample size = n = 7.

Q: The top 15 2018 Congressional race contenders (out of 24) in NJ who raised the most money reported…

A: Given data: 7.0, 1.2, 6.4, 5.4, 2.1, 4.4, 2.9, 2.3, 1.75, 1.6, 1.5, 1.5, 1.4, 1.1, 0.8.

Q: Calculate the mean, standard deviation, and variance for the following five scores: 9, 4, 7, 1, 4.

A: Considering the scores as population. The population mean is, μ=∑XN=9+4+7+1+45=255=5 Thus, the…

Q: c.    What is the mean of the sample means? d.    What is the standard deviation of the sample means…

A: Let  Mu = population mean  X bar = sample mean n = sample size  Sigma = population standard…

Q: On a normal distribution, four participants obtained the following deviation scores: -5,0,+3,+1.…

A: Given deviation scores of four participants from a normal distribution. The mean for the deviation…

Q: a) What is the mean of the sampling distribution? b) What is the standard deviation of the sampling…

A: Let p be the population proportion. Then p = 0.72 Let X denote the number of Americans in sample of…

Q: Find the standard deviation for the given sample data. given: 3,4,6,3,4

A:

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: Salaries for teachers in a particular state have a mean of $ 43000 and a standard deviation of $…

A: I have solved first three parts. Given  μ=$ 43000σ=$ 4700 Central limit theorem:-  The  theorem…

Q: If a random variable is standardized (by subtracting the mean and divided by the standard…

A: If X~N(μ,σ2) mean=μ, variance=σ2 Let, Y=X-μσ Then, mean =E[X]-μσ=μ-μσ=0 Variance =1σ2Var(X)=1σ2·σ2=1…

Q: A dozen banks reported the following sales of gold (in ounces) for the week of February 1, 2021…

A: The data of sales of gold is, 685, 857, 973, 495, 453, 892, 1173, 743, 1244, 797, 852, 931 The mean…

Q: 3. Given the sample variance of a distribution, explain how to find the standard deviation.

A: Variance is the measure of dispersion that calculates the average of the squared difference from the…

Q: B. v What is the mode for table 2? v What is the sample standard deviation for table2 ? v Calculate…

A: data given 290,340,150,300,200,100,400,500,600,89,94 note: According to Bartleby guidelines expert…

Q: 2. How is the sample size related to the deviation?

A: We have to define how sample size is related standard deviation

Q: A standardized memory test has a mean of μ=100 and a standard deviation of σ = 10. Answer the…

A: (c )   Obtain the scores that separate the middle 28%. The scores that separate the middle 28% is…

Q: Compute for the sample mean, sample variance and sample standard deviation. The score of the 5…

A: Given: The scores are provided as:                                                    35, 15, 31,…

Q: Given a sample data set with a Standard Deviation of 1.34, what is the Variance of the data set.?…

A: We have to find variance.

Q: What are the mean and standard deviation of the sampling distribution of the difference in sample…

A:

Q: Suppose a population has three values 13, 17 and 24. What is the standard deviation of the sampling…

A: Given, Population values are 13, 17 and 24. Samples are drawn without replacement.

Q: Assume the sample standard deviation is s=10, what do you conclude?

A: here given, sample mean = 87 n = 25 sample standard deviation  = 10

Q: The Economic Policy Institute periodically issues reports on wages of entry-level workers. The…

A: Given For Male college Mean=$21.68 Standard deviation=$2.30 For female college Mean=$18.80 Standard…

Q: What is the standard deviation of the following sample data? 38,27,39,29,41,42

A:

Q: In a statistics class, 10 scores were randomly selected and the following results were obtained: 74,…

A:

Q: if the sample mean is 10, the population standard deviation is 20, and the sample size is 25, then…

A:

Q: Recently, a random sample of 25-34 year olds was asked, "How much do you currently have in savings,…

A: Solution  Saving  Frequency (f)  Midpoint(x)  x2 fx fx2 0 - 199 337 99.5 9900.25 33531.5…

Q: Does the sample size have an effect on the standard deviation of all possible sample means? Explain…

A: Points on sampling distribution of the sample mean: If the true population distribution of a random…

Q: (a) What is the probability that a single student randomly chosen from all those taking the test…

A: Z table has used to find the probability.

Q: The scores of individual student on the American College Testing (ACT) Program Compsite College…

A: Given that - The scores of individual student on the American College Testing (ACT) Program Compsite…

Q: In a statistics class, 10 scores were randomly selected, and the following results were obtained:…

A: Mean: It is the sum of the total observations divided by the total number of observations. Range: It…

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

A:

Q: Find the sample variance and sample standard deviation for the sample data 21, 17, 13, 25, 9, 19, 6…

A: Here, x x-x (x-x)2 21 6 36 17 2 4 13 -2 4 25 10 100 9 -6 36 19 4 16 6 -9 81 10 -5…

Q: If the number of degrees of freedom for a chi-square distribution is 32, what is the population mean…

A: We have given that,  Number of degrees of freedom from chi- square distribution (df) = 32  Then, We…

Q: 4. What is the mean of the sampling proportion? 5. What is the standard deviation of the sampling…

A: We have given that the population proportion p is 45% =0.45 and sample size n is 160. In Binomial…

Q: The scores of individual students on the American College Testing (ACT), a college readiness…

A: Given data The scores of  individual students has a  mean of 18.6 and a standard deviation of 6.0.…

Q: The average speed of 1500 vehicles traveled on a stretch of highway that day is 67 miles per hour…

A:

Q: If the population standard deviation is 20 and the sample size is 25, then what is the value of the…

A:

Q: A guidance counselor wishes to determine the mean number of changes in academic major by college…

A: Given that, Standard deviation = 0.45 90% confidence level

Q: Determine the point estimate, p and the sample standard deviation, S5.

A: here n = 439 x= 162 here x= no of students working full time while going to school

Q: Find the sample standard deviation for the following scores: x = 2,45,2,6,3,2,9,10,11,34,64

A: The random variable is x. The sample size is 11. It is given that, the sample size of 11…

Q: B.) Select the bestanswers regarding the figures below. 1.) In the sample distributions in Figure 1,…

A:

Q: In sample standard deviation,(n - 1) is called degree of freedom, why?

A: The average of the sample variances for all possible samples must be equal to the population…

Q: The average speed of 64 random cars traveling on a certain highway was 80 km/h and the sample…

A: We have given that,  Average speed (x̄) = 80 , standard deviation    (s) = 20, Confidence level(C.I)…

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.