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We assume that we have selected two independent random samples from populations having proportions p1 and p2 and that p-hat1 = 800/1000 and p-hat2 = 950/1000
Calculate a 95% confidence interval for p1 - p2.
Test Ho: p1 - p2 = 0 versus Ho: p1 - p2 ≠ 0 by using a rejection point and by setting α equal to .05.
What is the rejection point?
What is your conclusion?
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
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They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
At 0.05 level of significance, is there enough evidence to conclude that difference exists between proportion of students who have ear infections at one school and the other?
What is the proportion of people surveyed that rated the subway system from 3 to 4. What is the proportion of people surveyed rated the Subway System from 1 to 3.
Which of the following(s) can be considered (a) variable(s)?
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Explain the value of test statistic using t distribution for the given value. Illustrate value of the t test statistic if you are testing a hypothesis.
High levels of glucose in the blood are indications of diabetes, which is becoming more prevalent in the United States. Diabetes can lead to many complications such as blindness and heart disease. A random sample of 180 individuals had their blood su..
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