The gestation period of humans follows a normal distribution with a mean of 266 days anc standard deviation of 16 days. If random samples of 15 pregnancies are studied, what is the mean and standard error of th sampling distribution of the sample mean? mean of the sampling distribution [ Choose ] standard error of the sampling distribution [ Choose ]

Q: What's the standard deviation for the sample data set to 2 decimal places {6.65,10.82,15.83,20.76}

A: It is an important part of statistics. It is widely used.

Q: Based on data from 1996-2006 from the Western Regional Climate Center, the average speed of winds in…

A: We have given that  Mean=10.6  Standard deviation=3.5 Sample size=n=30

Q: 6, 8, 9, 4, 3, 11, 4, 6, 5, 7,19 find the standard deviation for this sample show work

A:

Q: Discuss the random sampling and the sampling distribution of the sample average?

A: Simple random sampling: A simple random sample of size n is collected from a large population where…

Q: n by age group (this means to calculate the relative frequencies after separating the data based on…

A: Under 30 30-39 40-49 50 and over Promoted 16 22 26 15 Not-promoted 38 39 45 38

Q: Define Sampling Distribution of Difference Between Means?

A: Sampling Distribution: The probability distribution of the sample statistic is called as the…

Q: Random samples of size 8 are drawn from the population and the mean of each sample is determined. Is…

A: Given data: Random samples of size 8 are drawn from the population and the mean of each sample is…

Q: Find the 60th percentile of the standard normal distribution and draw the bell curve( round to the…

A: we have to find 60 th percentile..

Q: Describe the distribution of sample means (i.e., shape, measure of central tendency and variability)…

A:

Q: Fluorescent lightbulbs have lifetimes that follow a normal distribution, with an average life of…

A: Solution: From the given information, σ=1,612 hours and n=332.

Q: The patient recovery time from a particular surgical procedure is normally distributed with a mean…

A: We have given that.    X~N( μ , ?^2 )    μ = 5.1      , ? = 1.8   Z-score =( x - μ )/?

Q: Among health care workers at a local hospital, the average number of vacation days taken per year is…

A: The mean is 5 and the standard deviation is 2.5.

Q: random sample of size 64 is drawn from a population with mean 80 and standard deviation 20. Describe…

A: Given: Population mean μ=80 Population standard deviation σ=20 Sample size (n) = 64

Q: The standard deviation of a sampling distribution is smaller than the standard deviation of the…

A: The comparison of sd of sample to the sd of the population is as follows:

Q: Does the distribution of sample variances tend to be a normal distribution

A: The shape of the sample distribution of sample variance will depend on the shape of the population…

Q: What is the formula for this standard deviation?   What does the central limit theorem say about the…

A: Solution:Standard deviation:The variation between each observation from its mean is known as…

Q: 2. A survey found that 73% of respondents currently have a job. Is 73% a statistic or a parameter?…

A: Given that  Sample proportion p^=0.73 Parameter is based on population.

Q: Scores on the verbal ability portion of the Graduate Record Examination (GRE) follow a normal…

A: Let X be the verbal ability portion of the Graduate Record Examination (GRE) follow a normal…

Q: What z-score value separates the highest 10% of the scores in a normal distribution from the lowest…

A: We want to find highest 10% value for z score

Q: How does the sample size affect how close to normal a distribution of either sample means or sample…

A: The statistic measures the characteristics of samples to estimate the population.

Q: Among health care workers at a local hospital, the average number of vacation days taken per year is…

A: Solution-: Given: μ=5,σ=2.5,n=50 We find the standard error for the sampling distribution =?

Q: Which one is not measuring the degree to which the scores in a distribution are spread out or…

A: Variance is a measure of dispersion. It measures how far each observation falls from the mean of the…

Q: Ques45)The first and third quartile of a normal distribution respectively. Then distribution is the…

A:

Q: Sample List= 1440,1514,1554,1383,1521,1525 assuming a normal distribution, find 95% confidence…

A: Obtain the 95% confidence interval for the true mean value. The 95% confidence interval for the true…

Q: The spread or variation in the sampling distribution of means is called the                 of the…

A: Spread or variation in the sampling distribution of means is given.

Q: What z-score value separates the highest 70% of the scores in a normal distribution from the lowest…

A: Normal distribution is given.

Q: Most graduate schools of business require applicants for admission to take the Graduate Management…

A: Given dataMean (µ)= 527Standard Deviation (σ) = 112n = 49

Q: The SAT is an exam that is used by many universities for admission. Suppose that the scores on the…

A: Solution: Let X be the score on SAT mathematics exam. From the given information, X follows normal…

Q: Ages of pennies have a mean of 13.13 years and standard deviation of 8.76 years. Suppose we take a…

A:

Q: For any normal distribution, what is the probablity of selection a score less than the mean?

A: Given, The variable follows normal distribution.