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Question: Refer to Exercise. A Gallup poll the previous August (1999) asked n = 1028 U.S. adults the same question, and 524 responded that they were somewhat or completely dissatisfied.
a. Repeat the test in Exercise and make a conclusion for August 1999.
b. Referring to the data presented in Exercise and in this one, and assuming the samples were taken independently, is there sufficient evidence to conclude that the proportion of U.S. adults who were dissatisfied changed from August 1999 to August 2000? Justify your answer.
Exercise: A Gallup poll taken in August 2000 (Chambers, 2000) asked U.S. adults in a random sample of n = 1019 about their satisfaction with K-12 education. One question was: "Overall, how satisfied are you with the quality of education students receive in grades kindergarten through grade twelve in the U.S. today-would you say: completely satisfied, somewhat satisfied, somewhat dissatisfied or completely dissatisfied?" There were 622 respondents who said that they were somewhat or completely dissatisfied. Is this sufficient evidence to conclude that a majority of U.S. adults were dissatisfied in August 2000? Carry out the test using a = .05, and make sure to state a conclusion.
suppose that in a simple random sample of 100 people 69 of them believe the seahawks will win the superbowl this year.
Would you always get 507 votes for Bush and 483 for Kerry?- In 95% of such polls, your sample proportion of voters for Bush should be between what two values?
a. What is the probability that the selected student is a male? b. What is the probability that the selected student is in the College of Agriculture? c. What is the probability that the selected student is a male in the College of Agr..
What is the probability that the device will detect at least one of the two shoppers entering together?
Describe the sampling distribution of in this situation, including its mean and standard deviation.- Define the parameter of interest in the context of this situation. Use appropriate notation.
What can you conclude regarding the information? Who tends to order the most or least number of condiments?
A hypothesis test has been set up and is to be conducted at the level of significance. If the sample size is doubled, what will be the effect on α? On β?
Given the following revenue and cost function for a business firm, calculate the break-even quantity, total revenue, total cost and total profit at break-even level of production.
According to Chebyshev's Theorem, how many students scored between 24 and 78? Assume that the distribution is normal. Based on the Empirical Rule, how many students scored between 24 and 78?
Describe the concept that you had the most difficulty understanding. How does it apply to being a manager in your chosen field - Describe the concept of skewness. How can the data be skewed?
If we fit the least-squares line to the 12 data points (one for each month) we obtain the following results from a software package. Notice that temperature is taken as the explanatory variable and crawling age as the response.
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
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