Suppose a preliminary sample of 200 parts produced by this machine showed that 7% of them are defective. How large a sample should the company select so that the 95% confidence interval for p is within .02 of the population proportion?

Q: A retail store is considering adding a new product line to its inventory. The store wants to know…

A: Sample size, N = 125favourable cases, x=70Confidence level, cl = 0.90level of significance,  = 0.10

Q: How to know if a histogram is a normal distribution

A: In general, the graph of the normal distribution is bell-shaped and symmetric. Here, bell shape of…

Q: Write down the important properties of the Normal Curve.

A: A normal curve is identified using the values of the mean and standard deviation to show the…

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

A: Definition Sample Mean x It is the mean of all the values of a sample.   Population μ It is the mean…

Q: Explain the key features of a normal distribution

A: Normal Distribution :  The normal distribution is also called as Gaussian distribution. It is made…

Q: What are the Properties of the Normal Curve?

A: A normal curve is identified using the values of the mean and standard deviation to show the…

Q: Describe about the Properties of the Normal Curve?

A: A normal curve is identified using the values of the mean and standard deviation to show the…

Q: Describe about statistical error.

A: In statistics and inference theory, there are various methods through which estimates of true…

Q: What is the distribution of a statistic based on a population parameter?

A: Population Parameter It is a characteristic of the entire population. The value of a population…

Q: You cannot assume that a random sample taken from a population  follows a normal distribution if the…

A: Answer:- Normal distribution:-

Q: What is a frequency distribution? Explain how these differ if we are using qualitative data versus…

A: Frequency distribution- Frequency distributions are visual displays that organise and present…

Q: The distribution of sample means tends to be a normal distribution. true or false?

A: This question explores the characteristics of the distribution of sample means. Specifically, it…

Q: What are the characteristics of a normal distribution? What two characteristics make a distribution…

A: Given that  What are the characteristics of a normal distribution?   What two characteristics make a…

Q: How to find the variance, explain the formula

A: Mean:Mean is a measure of center in case of quantitative data. Mean of a data set is the sum of the…

Q: How to estimate distribution

A: Steps to estimate a distribution1) Split the sample space into bins2) Count the no of samples that…

Q: A student will spend 15 hours average each week in class. If the standard deviation is 2 hours, what…

A: Given that mean=15 and standard deviation = 2 Let, X= number of hours spent by a student in the…

Q: You can assess normality of data using

A:

Q: Write Two Quantitative Paragraphs about Statistics!

A: Statistics is a field which involves collection, arrangement and analysis of the data to draw…