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Health care satisfaction. A November 2007 Gallup Poll of 1004 adults found that 572 are satisfied with the total cost they pay for their health care. The announced margin of error is plus or minus 3 percentage points. The announced confidence level is 95%.
a. What is the value of the sample proportion p who so they are satisfied with the total cost they pay for their health care? Explain in words what the population parameter p is in this setting.
b. Make a confidence statement about the parameter p.
Compute the five number System for this data set and list Xmin,Q1,Q2,Q3 & Xmax. See Videos and show how the pointer was computed for each quartile. (15%)
If the manager decides to spend $3000 on advertising, based on the simple linear regression results given above, what would the estimated sales be?
Find the critical values and identify the rejection regions. Calculate d and sd. Use the t-test to find the standardized test statistic t. decide whether to reject or fail to reject the null hypothesis.
Assume adults have IQ scores that are normally distributed with a mean of 105 and a standard dviation 20. Find the probability that a rondomly selected adult has an IQ betwwen 93 and 117.
R1 signifies the first Poisson event time after m (or 1 if there are no Poisson events in [m,1]), then it would be learned that marked position lies between L1 and R1.
Give a 99% confidence interval for the proportion of adults who attended church or synagogue during the week preceding the poll.
What is the point estimate of the proportion of the population of employees who strongly dislike their current work experience?
People in a large population average 60 inches tall. You take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall.
Recent crime reports indicate that 5.2 motor vehicle thefts occur each minute in the United States. Assume that the distribution of thefts per minute can be approximated by the Poisson probability distribution.
The central district students failed. Develop a probability tree showing all marginal, conditional and joint probabilities. Develop a joint probability table.
How does hypothesis testing contribute to the scientific knowledge base? What is one example of a null hypothesis statement?
The mean wait time was 60 minutes and the standard deviation was 10 minutes. How many patients waited between 50 and 70 minutes?
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