Recent questions in Bivariate numerical data

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An MP3 manufacturer claimsthat 65% of teenagers 13 to 16 years old have their own MP3 players.

A researcher wishes to test the claim and selects a random sample of 80 teenagers. She finds that

57 have their own MP3 players. At � = 0.05, should the claim be rejected?

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The average credit card debt for a recent year was $9205. Five years earlier the average credit card

debt was $6618. Assume sample sizes of 35 were used and the population standard deviations of

both samples were $1928. Find the 95% confidence interval of the difference in means.

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J. P. Morgan Asset Management publishes information about financial investments. Between 2002 and 2011 the expected return for the S&P was with a standard deviation of and the expected return over that same period for a Core Bonds fund was with a standard deviation of (J. P. Morgan Asset Management, *Guide to the Markets*). The publication also reported that the correlation between the S&P and Core Bonds is . You are considering portfolio investments that are composed of an S&P index fund and a Core Bonds fund. **a. **Using the information provided, determine the covariance between the S&P and Core Bonds. Round your answer to two decimal places. If required enter negative values as negative numbers.

College StatisticsOpen question

Njifor Raymond2022-03-18

the probability that a mash stick will break on been stroked is 0.4.what is the probability that out of 50 sticks striken

a) non will break

b)more than one stick will break

College StatisticsAnswered question

Charles Kingsley 2021-12-17

Give an example of each or state that the request is impossible. For any that are impossible, give a compelling argument for why that is the case.

a) A sequence with an infinite number of ones that does not converge to one.

b) A sequence with an infinite number of ones that converges to a limit not equal to one.

c) A divergent sequence such that for every$n\in N$ it is possible to find nn
consecutive ones somewhere in the sequence.

a) A sequence with an infinite number of ones that does not converge to one.

b) A sequence with an infinite number of ones that converges to a limit not equal to one.

c) A divergent sequence such that for every

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aortiH 2021-06-29

For all these problems, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. In order to use a normal distribution to compute confidence intervals for p, what conditions on pp and nq need to be satisfied?

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Elleanor Mckenzie 2021-06-23

The pathogen Phytophthora capsici causes bell pepper plants to wilt and die. A research project was designed to study the effect of soil water content and the spread of the disease in fields of bell peppers. It is thought that too much water helps spread the disease. The fields were divided into rows and quadrants. The soil water content (percent of water by volume of soil) was determined for each plot. An important first step in such a research project is to give a statistical description of the data.
Soil Water Content for Bell Pepper Study
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(a) Make a box-and-whisker plot of the data. Find the interquartile range.

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illusiia 2021-06-23

You were asked about advantages of using box plots and dot plots to describe and compare distributions of scores. Do you think the advantages you found would exist not only for these data, but for numerical data in general? Explain.

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glasskerfu 2021-06-19

Use a graphing calculator to construct a 95% confidence interval for a sample of size 30 from a uniform distribution over the interval (0, 1). Take a class poll to determine the percentage of confidence intervals that contain the true mean. Discuss the result in class.

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jernplate8 2021-06-19

Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. In a survey of 2241 U.S. adults in a recent year, 650 made a New Year's resolution to eat healthier.

College StatisticsAnswered question

facas9 2021-06-08

When a correlation value is reported in research journals, there often is not an accompanying scatterplot. Explain why reported correlation values should be supported with either a scatterplot or a description of the scatterplot.

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emancipezN 2021-06-03

Suppose you were to collect data for each pair of variables. You want to make a scatterplot. Which variable would you use as the explanatory variable and which as the response variable? Why? What would you expect to see in the scatterplot? Discuss the likely direction, form, and strength. Gasoline: number of miles you drove since filling up, gallons remaining in your tank

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banganX 2021-05-31

Driven by technological advances and financial pressures, the number of surgeries performed in physicians' offices nationwide has been increasing over the years. The function

a. Plot the graph of f in the viewing window

b. Prove that f is increasing on the interval [0, 15].

College StatisticsAnswered question

Phoebe 2021-05-08

You are given the sample mean and the population standard deviation. Use this information to construct 90% and 95% confidence intervals for the population mean. Interpret the results and compare the widths of the confidence intervals. From a random sample of 24 months from January 2006 through December 2016, the mean number of tornadoes per month in the United States was about 100. Assume the population standard deviation is 114.

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boitshupoO 2021-05-05

Consider a random sample of size n = 31, with sample mean

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alesterp 2021-05-05

The following advanced exercise use a generalized ratio test to determine convergence of some series that arise in particular applications, including the ratio and root test, are not powerful enough to determine their convergence. The test states that if $$

Let

Show that

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Tazmin Horton 2021-05-05

B. G. Cosmos, a scientist, believes that the probability is

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Ernstfalld 2021-03-07

Consider binary strings with n digits (for example, if n=4, some of the possible strings are 0011,1010,1101, etc.)

Let Zn be the number of binary strings of length n that do not contain the substring 000

Find a recurrence relation for Zn

You are not required to find a closed form for this recurrence.

Let Zn be the number of binary strings of length n that do not contain the substring 000

Find a recurrence relation for Zn

You are not required to find a closed form for this recurrence.

College StatisticsAnswered question

usagirl007A 2021-03-06

Find the regression line using the given points.

- 1
- 2

The complexity of bivariate data examples is the use of two complex sets that are always dependent on what is being used. A good bivariate data example is the sales of ice-cold drinks depending on the weather and the heat or the cold of the day. The same can be said about finding statistical answers to the questions based on what equation is being used like finding positive or negative sides. Choosing two columns by using graphs and calculations will help you address all bivariate data questions that you will encounter below to find the best solutions to your problem.