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1 A sample size of 900 is not large enough to conclude that the sampling distribution of p is a normal distribution, when the estimate of the population proportion is 0.995.
2 .The standard deviation of all possible sample proportions increases as the sample size increases.
3. For any sampled population, the population of all sample means is normally distributed.
4. The mean of the sampling distribution of X‾ is always equal to the mean of the sampled population.
5. The reason sample variance has a divisor of n-1 rather than n is that it makes the standard deviation an unbiased estimator of the population standard deviation.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
Construct a 95% confidence interval for the proportion of adults from the West who say traffic congestion is a serious problem.
X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities:
The overall average for the samples is 17 ounces. The range is only 0.5 ounce. Determine the upper and lower control-chart limits for averages for the boxes of cereal.
Can you please give one example of a Qualitative data and one example of a Quantitative Data that you face daily? Please explain why it is a Quantitative or Qualitative data and describe the scale of measurement.
Given that the exam has a mean of 1000 and a standard deviation of 200, what is the lowest possible score a student needs to qualify for acceptance into the JB University?
Test the following hypotheses using the Traditional Method. You must show all the steps involved and the final statement must be phrased appropriately for the problem.
Bulloch County has never allowed liquor to be sold in restaurants. However in 3 months, county residents are scheduled to vote on a referendum to allow liquor to be sold by the drink.
Assume you choose 20 houses at random. On average, how many houses of twenty would you expect to have DVD? Determine standard deviation of number of houses with DVD?
If the shop does not want to give more than 1% of its customers a free lube and oil change service, how long should the guarantee be?
A coin was flipped 60 times and came up heads 38 times. (a) At the .10 level of significance, is the coin biased toward heads? Show your decision rule and calculations. (b) Calculate a p-value and interpret it.
What is the coefficient of determination, and wat is its meaning?
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