Standard deviation of the corresponding normal distribution

Assignment Help Other Subject

Reference no: EM13337917

In a certain binomial distribution,π=0.20 and n=30.In using the normal approximation,

a. What are the mean and standard deviation of the corresponding normal distribution?

b. If x=the number of sucessesamong the 30 observations,determine the following: P(x=5),P(4< x < 7), P(1 < x< 5), P(x > 7).

Reference no: EM13337917

Questions Cloud

Is this point estimate or an interval estimate : During the month of July,an auto manufacturer gives its production employees a vacation period so it can tool up for the new model run. In surveying a simple random sample of 200 production workers, the personnel director finds that 38% of them plan ..

Standard error of the sampling distribution of theproportion : It has been estimated that 17.0% of mutual fund shareholders are retired persons. Assuming the population proportion to be π=0.17 and that a simple random sample of 400 share holders has been selected:

Confidence intervals for the population mean : The following data values are a simple random sample from apopulation that is normally distributed,with σ2 =2.5.0: 47,43,33,42,34, and 41. Construct and interpret the 95% and99% confidence intervals for the population mean.

Normally distributed with a standard deviation : It has been reported that the average U.S. office worker receives 14 fax messages per day. For purposes of this exercise,we will assume that the daily number of fax messages is normally distributed with a standard deviation of 5.0 messages.

Standard deviation of the corresponding normal distribution : In a certain binomial distribution,π=0.20 and n=30.In using the normal approximation, What are the mean and standard deviation of the corresponding normal distribution?

Describe the probability distribution : Flip a fair coin 50 times, assign a random variable X, where the value of X is equal to the number of heads observed in the flips. Describe the probability distribution of X, and calculate the probability of observing 30 or more heads or more in 50 f..

Population standard deviation : A sample of 60 is used and the population standard deviation is 8.Use the critical value approach to state your conclusion for eachof the following sample results.

Tensile strength of spot welds produced by robot welder : The tensile strength of spot welds produced by a robot welder is normally distributed, with a mean of 10,000 pounds per square inch and a standard deviation of 800 pounds per square inch. For a simple random sample if n= 4 welds, what is the probabil..

Number of ralphs purchases that have been stolen : A city lae-enforcement official has stated that 20% ofthe items sold by pawn shops within the city have been stolen.Ralph has just purchased 4 items from one of the city's pawn shops.

User Account

All Pages