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Please answer both questions using a minimum of 100 words. Use examples or references to support the solution. All reference sources and examples should be based only in USA.
1. A common question many have is why study statistics in the first place.
2. Say we have a sample of 100 with mean 5 and std of 0.5 and you do not know the Population Sigma. How do you go about calculating different probabilities--say an item was selected at random and we wanted to know how far it is from the mean or the probability that it is at least 4.5 or more?
Examine the behaviour of 99% critical values for these degrees of freedom, and comment on the limits in this case.
Analyze and support whether you believe that the changes recommended are statistically valid and sound enough to make practice changes in a hospital for the two papers listed below. Also in your answer please touch on the following items
Suppose that 20% of the population has high blood pressure. If 7 people are randomly selected off the street, what is the probability that more than 4 of them do not have high blood pressure?
Let X bar be the average of n such independent measurements. Use Chebychev's inequality to estimate how large n should be such that P(|X bar - M |
Using a normal distribution with a mean of 1118 and a standard deviation of 52 for the weights of steers, what percent of steers weigh over 1250 pounds, under 1100 pounds, between 1000 and 1150 pounds.
Is there evidence of a significant difference between males and females in the proportion who enjoy shopping for clothing at the 0.01 level of significance?
School seniors in his random sample, 159 believe that "getting rich" is an important goal. Can he conclude, at the 0.05 level of significance, that the proportion has indeed changed?
A nationwide sample of influential Republicans and Democrats was asked as part of a comprehensive survey whether they favored lowering environmental standards so that high-sulfur-coal could be burned in coal fired power plants.
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300.00?
Describe a business situation that you have had or might face that will benefit from the use of confidence intervals?
What regression equation would you want to do for banking? Give the y and x variables. Explain why this would be important to know.
Let S be a random variable (not necessarily positive). Prove using Markov's inequality that for every p>0 and for every constant q,
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