Calculus and Above

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We want to examine whether or not a color identification
We want to examine whether or not a color identification (red, blue, green, or yellow) is related to location (yes or no) in the population. Using data from a random sample which of the following stat… read more
Sandhya
Master's Degree
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Dr. Haber investigates the effect of eating breakfast on
Dr. Haber investigates the effect of eating breakfast on exam performances in a social psychology class. To do so, Dr. Haber splits people up into groups based on if they ate breakfast or not, and the… read more
Scott
Master's Degree
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When conducting an independent samples t test you have data
When conducting an independent samples t test you have data for two ________, but want to test a hypothesis about two ________ .paired samples; populations populations; paired samples unrelated sample… read more
R.R. Jha
Bachelor's Degree
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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
GLENN GILONGOS
Master of Mathematics
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1. Use the information below to answer the question. The
1. Use the information below to answer the question. The following table provides data on a sample of customers who visited a local restaurant. The restaurant owner believes that the average profit pe… read more
Ryan
Bachelor's Degree
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32. This is used to compare means while controlling for the
32. This is used to compare means while controlling for the effect of a covariate. (Points : 1) ANOVA RANOVA ANCOVA Dependent t-test 33. The assumptions for ANCOVA differ substantially from those for … read more
Stevewh
Teacher
Bachelor's Degree
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1) 5 students from each class were randomly selected from
1) 5 students from each class were randomly selected from all 44 different undergraduate classes in the Eberly College of Science at Penn State. The 220 undergraduate students completed an anonymous s… read more
SusanAthena
Master's Degree
Master's Degree
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13. A researcher is interested in whether herbal remedies are
13. A researcher is interested in whether herbal remedies are effective in relieving allergies, and if so, which ones are most effective. The researcher takes a group of 20 allergy sufferers and rando… read more
Trigeoscal
College Math Professor
Master's Degree
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A clinical psychologist notices that admission to the psychiatric
A clinical psychologist notices that admission to the psychiatric hospital she works at seem to vary by season. Using a chi-square test, she rejects the null hypothesis that hospital admission is inde… read more
Math-John
PhD in Statistics
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Assume that the data you have collected is testing a
Assume that the data you have collected is testing a hypothesis about a mean and n = 107. Find the critical value used to test a null hypothesis. α = 0.05 for a left-tailed test. Assume that the data … read more
Rajan.Sareen
Sr. Statistician
Master's Degree
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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
Ryan
Bachelor's Degree
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" For Sandhya Sharma" Please provide feedback on these sample
" For Sandhya Sharma" Please provide feedback on these sample studies. ) 2 Independent groups: Hypnotism is a common intervention for smoking cessation. Dependent variable: smoking cessation (cigarett… read more
Sandhya
Master's Degree
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1. Use the data in the excel file for this question. A new
1. Use the data in the excel file for this question. A new synthetic insulin pill (Ins347) is being researched for Type II diabetics. A group of Type 2 diabetics volunteered for the study and over the… read more
dhouse1940
Master's Degree
Master's Degree
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) What are the critical z-values for a two-tailed hypothesis
) What are the critical z-values for a two-tailed hypothesis test if the significant level = 0.01? A. ± 1.96 B. ± 2.33 C. ± 2.58 D. ± 1.65 2) In classical hypothesis testing, the test statistic is to … read more
Chirag
Master's Degree
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14) Sound engineers studied factors that might affect the output,
14) Sound engineers studied factors that might affect the output, in decibels, of a rock concert's speaker system. The desired level of significance was a = .05. The results of their ANOVA tests are s… read more
Chirag
Master's Degree
10,329 satisfied customers
Consider how the chi-square test of association is a nonparametric
Consider how the chi-square test of association is a nonparametric procedure that requires different assumptions. Bring to mind a real-world situation or problem that would best be analyzed using this… read more
SusanAthena
Master's Degree
Master's Degree
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1) What are the critical z-values for a two-tailed hypothesis
Attachment: 2012-02-07_035336_final.docx 1) What are the critical z-values for a two-tailed hypothesis test if the significant level = 0.01? A. ± 1.96 B. ± 2.33 C. ± 2.58 D. ± 1.65 2) In classical hyp… read more
R.R. Jha
Bachelor's Degree
6,909 satisfied customers
"StatsPro" 21. Which of the following statements are true? I.
"StatsPro" 21. Which of the following statements are true? I. Random sampling is a good way to reduce response bias. II. To guard against bias from undercoverage, use a convenience sample. III. Increa… read more
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