Calculus and Above

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The average final exam score for the statistics course is
The average final exam score for the statistics course is 75%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is different. … read more
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Two independent samples, Group 1 and 2, are collected with
Two independent samples, Group 1 and 2, are collected with the following data: Group x n 1 x1 = 112 n1 = 200 2 x2 = 88 n2 = 200 (a) Construct a 95% confidence interval for p1 − p2. What does the inter… read more
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A recent study investigated the extent to which hypertension
A recent study investigated the extent to which hypertension is affected by alcohol consumption. Among other things, the study compared the rate of hypertension in nondrinkers to the rate in people th… read more
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Assume that a simple random sample has been selected from a
Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Identify the null and alternative​ hypotheses, test​ statistic, P-value, and state… read more
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Assume that the data has a normal distribution and the
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Alpha = 0.05 for a two-tailed test … read more
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ARE THERE CHARGES IN VOLVED, According to a​ research,
According to a​ research, 52.052.0​% of households nationwide used natural gas for heating during a year.​ Recently, a survey of 2 comma 3002,300 randomly selected households showed that 53.053.0​% used natural gas. Use a 0.05 significance level to test the claim that the 52.052.0​% national rate has changed. Formulate the null and alternative hypotheses. Choose the correct answer below. A. Upper H 0H0​: pnot equals≠0.520.52​, Upper H Subscript aHa​: pequals=0.520.52 B. Upper H 0H0​: pgreater than>0.520.52​, Upper H Subscript aHa​: pless than<0.520.52 C. Upper H 0H0​: pequals=0.520.52​, Upper H Subscript aHa​: pgreater than>0.520.52 D. Upper H 0H0​: pequals=0.520.52​, Upper H Subscript aHa​: pnot equals≠0.520.52 Find the test statistic. zequals= nothing ​(Round to one decimal place as​ needed.) Find the​ P-value for the found test statistic. ​P-valueequals= nothing ​(Round to four decimal places as​ needed.) Now make a conclusion. Choose the correct answer below. A. There is not enough information to make a conclusion. B. There is not sufficient evidence to support the claim that the percentage of households using natural gas has changed. C. There is sufficient evidence to support the claim that the percentage of households using natural gas has changed … read more
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1. What is the appropriate critical value of the following
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1. What is the appropriate critical value of the following
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1) Trails in an experiment with a polygraph include 96
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REMEMBER, these are assessed preparatory problems related to
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1. (Chapter 7: Estimating a Population Proportion) A poll
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For the problems that require a written response, please use
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1. Assume that the data has a normal distribution and the
1. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. ALPHA = 0.05 for a left-tailed test. -… read more
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Applied Biostatistics 1. The following are body mass index
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A sample of 25 different payroll departments found that the
A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year with a standard deviation of 23.8 days. What is the 95% confidence interval for the average… read more
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I need help with homework questions. They are multiple choice
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Please help me with this test! I have no idea! :( 5.The
Please help me with this test! I have no idea! :( 5.The test statistic in a two tailed test is z=-1.63. Find the P-value. 6. Assume that a hypothesis test of the given claim will be conducted. Identif… read more
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2)Which of the following hypothesis tests use a z test statistic? A)
2)Which of the following hypothesis tests use a z test statistic? A) Matched Pairs B) Single Proportion C) Two Proportions D) Goodness-of-Fit E) Single Mean: σ Known F) Independence G) Two Variances H… read more
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