Calculus and Above

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To evaluate the effect of a treatment for depression, a
To evaluate the effect of a treatment for depression, a researcher collected a sample of n=4 individuals with depression, gave the sample the depression treatment, and got an average depression after … read more
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A researching team conduct a survey, where out of 76
A researching team conduct a survey, where out of 76 Americans surveyed, only 2 had seen or sensed the presence of an angel. Test the claim that 13% of Americans have seen or sensed the presence of an… read more
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Statistics- A. A survey of 1701 people found that 15.9% of
Statistics-A. A survey of 1701 people found that 15.9% of individuals purchase science fiction books at a particular bookstore. Find and interpret a 90% confidence interval for the true proportion of … read more
Ann
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MSC Mathematics
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A survey claims that 9 out of 10 doctors (i.e., 90%)
A survey claims that 9 out of 10 doctors (i.e., 90%) recommend brand Z for their patients who have children. To test this claim against the alternative that the actual proportion of doctors who recomm… read more
Ann
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MSC Mathematics
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Some travel agents claim that honeymoon hot spots vary
Some travel agents claim that honeymoon hot spots vary according to age of the couple. Suppose that 280 East Coast residents who recently get married were interviewed as to where they spent their hone… read more
Kofi
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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 student at a four-year college claims that average
A student at a four-year college claims that average enrollment at fouryear colleges is higher than at twoyear colleges in the United States. Two surveys are conducted. Of the 35 twoyear colleges surv… read more
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The average work week for engineers in a start-up company is
The average work week for engineers in a start-up company is believed to be about 60 hours. A newly hired engineer hopes that its shorter. She asks 10 engineering friends in start-ups for the lengths … read more
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A claim is made that 75% of college students use their
A claim is made that 75% of college students use their laptops to take notes during lecture. Blaine believes this claimed value is too low. He is able to survey a random sample of 245 college students… read more
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Master's Degree
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A researcher randomly assigns five individuals to receive a
A researcher randomly assigns five individuals to receive a new experimental procedure, measuring number of decision-making errors before and after the procedure. Baseline scores were 7, 6, 9, 7, and … read more
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It is claimed that 68% of college students change their
It is claimed that 68% of college students change their majors at least once. A researcher believes this claimed value is too low. He surveys a random sample of 247 college students and finds that 72%… read more
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A watchdog association claims that the percentage of
A watchdog association claims that the percentage of Americans who agree that the government is inefficient and wasteful is different from 70%. A researcher wants to test this claim. The researcher co… read more
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Confidence in banks: A poll conducted by the General Social
Confidence in banks: A poll conducted by the General Social Survey asked a random sample of 1325 adults in the United States how much confidence they had in banks and other financial institutions. A t… read more
Kofi
PhD in Statistics
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I do not under this math problem. Complete the following
Complete the following four hypotheses, using α = 0.05 for each. The week 5 spreadsheet can be used in these analyses.1. Mean sales per week exceed 42.5 per salesperson 2. Proportion receiving online training is less than 55% 3 Mean calls made among those with no training is at least 145 4. Mean time per call is 14.7 minutes Using the same data set from part A, perform the hypothesis test for each speculation in order to see if there is evidence to support the manager's belief. Use the Eight Steps of a Test of Hypothesis from Section 9.1 of your text book as a guide. You can use either the p-value or the critical values to draw conclusions. Be sure to explain your conclusion and interpret that to the claim in simple terms Compute 99% confidence intervals for the variables used in each hypothesis test, and interpret these intervals. Write a report about the results, distilling down the results in a way that would be understandable to someone who does not know statistics. Clear explanations and interpretations are critical. … read more
Sandhya_sharma
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1. The gestation of gray squirrels in captivity is listed
1. The gestation period of gray squirrels in captivity is listed as 44 days. It is recognized that the potential life span of animals is rarely attained in nature, but the gestation period could be ei… read more
Stevewh
Teacher
Bachelor's Degree
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Identify the null hypothesis Ho and the alternative hypothesis
Identify the null hypothesis Ho and the alternative hypothesis H1. A skeptical paranormal researcher claims that the proportion of Americans that have seen a UFO, p, is less than 1 in every one thousa… read more
Chirag
Master's Degree
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The scores on a physical performance test for male junior high
The scores on a physical performance test for male junior high school students are standardized, with mean 100 and standard deviation 10. In a large school district, a random sample of 144 boys attend… read more
Chirag
Master's Degree
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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
Stevewh
Teacher
Bachelor's Degree
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