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Assume that we will arbitarily choose sample of 64 from population having mean equal to 20 and standard deviation equal to 4.
Explain shape of sampling distribution of sample mean x. Do we require to make any suppositions about shape of the population?
Determine the mean and standard deviation of sampling distribution of the sample mean x
Compute the probability which we will get the sample mean greater than 21; which is , compute P(x > 21).
Compute the probability that we will get the sample mean less than 19.385; that is, compute P(x < 19.385).
The Financial Advisor exam has a mean of 500 and a standard deviation of 20. If the bank chooses to hire either Steve or Mark based solely on their exam performance, who is the bank more likely to hire? Show evidence for your answer.
Give three logically possible directions of casualty, indicating for each direction whether it is a reasonable explanation for the correlation in light of the variables involved (and why).
Stating assumptions on which your arguments and conclusions are based, sum up the statistical evidence regarding effectiveness of this diet.
We can think of this as the value of mew that maximizes f(y), the probability that our observed value of y occurs.
A random sample is selected from a normal population. The population mean is 60 and the standard deviation is 15. after treatment the sample mean is 65. the sample size is 25.
What is the weighted mean profit per delivery - a bottling company offers three kinds of delivery service - instant, same day and within 5 days.
A random sample of 50 female CFO's and a random sample of 40 male CFO's are selected. Find the expected value of the sample mean difference.
A recent study by a large retailer designed to determine whether there was a relationship between the importance a store manager placed on advertising and the size of the store revealed the following sample information:
Construct a 90% confidence interval for the proportion of all kernels that would not pop.
How would you find the normal approximation to the binomial probability P(x = 5) in part A? Please show how you would calculate µ and σ in the formula for the normal approximation to the binomial, and show the final formula you would use without g..
Conduct the following test using 95% level of confidence.
Determine the chance between 39% and 41% of registered voters in sample are Democrats.
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