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Prior experience has shown that the weight has a probability distribution with m= 6 ounces and standard deviation= 2.5 ounces. Which of the following is true about the sampling distribution of the sample mean if a sample of size 15 is selected? a) The mean of the sampling distribution is 6 ounces. b) The standard deviation of the sampling distribution is 2.5 ounces. c) The shape of the sample distribution is approximately normal. d) All of the above are correct.
Can the binomial distribution be used to model the number of rare events that occur over a given time period?
What is your conclusion regarding null hypothesis?
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
If we wanted to shorten the interval of the estimation of the true mean of Saturday sales to a width of $600 in total, what should the size of our sample be to achieve it?
Find out the marginal probability density function for the provided value. Assume that two random variables, X and Y, have bivariate pdf given by:
Determine probability of waiting less than 12 minutes between successive speeders. By using cumulative distribution function of X.
As part of their application for a loan to buy Lakeside Farm, a property they hope to develop as a bed-and-breakfast operation, the prospective owners have projected:
Area to right of mean of normal probability distribution is?
How could the engineer increase the accuracy of the interval without changing the level of confidence?
If the computer manufacturer decides to sample 2,300 of the microchips received in each shipment, what acceptance number, c, would they want?
Given a sample size of 9,245, a sample mean of 38, a standard deviation of 8.15, and a confidence level of 97%, calculate the lower bound of the confidence interval.
Random sample of 64 lightbulbs indicates a sample mean life of 350 hours. At a 5% level of significance, is the mean life more than 375. Which of the following is your two hypotheses?
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