We are interested in seeing if there are any meaningful differences in the willingness of certain...

We are interested in seeing if there are any meaningful differences in the willingness of certain tapestry segments to buy organic products. Top Tier reports purchasing an average of 3.8 organic items per week per family with a standard deviation of 2, while Pleasantville reports purchasing 2.3 organic items per week per family with a standard deviation of 0.5. The sample size for Top Tier is 50 and the sample size for Pleasantville is 100. Test the hypothesis at a 95% confidence level. Explain.

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orchestra answered 1 year ago

A group of researchers is interested in middle school students and their willingness to appear to...

A group of researchers is interested in middle school students and their willingness to appear to stand out. A random sample of 260 middle school students is gathered, and the researchers ask them to wear bright orange shoes to school for a day. In the sample of 260 students, 192 were willing to wear the bright orange shoes. Estimate the overall proportion of middle school students that would be willing to wear bright orange shoes to school for the day....

An instructor is interested in seeing if there is an association between attendance and final grade...

An instructor is interested in seeing if there is an association between attendance and final grade earned in a freshman level class. He records the number of absences for each student and then whether they pass or fail the class. The results are summarized below. Number of Absences 0-3 4-6 7+ Total Total 135 66 29 230 Fail 28 19 23 70 Total 163 85 52 300 Construct a 99% confidence interval for the true proportion of students who pass...

Q1. Researchers were interested in determining whether there were any differences in the tendency to procrastinate...

Q1. Researchers were interested in determining whether there were any differences in the tendency to procrastinate based on birth order, i.e. first, second, or third child born. Using the data in the table below, answer the following questions. State the null and alternate hypotheses. What is the total sample size? Identify the independent and dependent variables What is the test statistic value? What is the p value? What is your conclusion (assume α = .05)? Phrase your conclusion based on...

The Berkl fishing tackle company is interested in seeing the effects of sunlight on the strength...

The Berkl fishing tackle company is interested in seeing the effects of sunlight on the strength of its premier fishing line. According to specifications the average breaking strength of a particular line is 10 pounds. a) What would be the null and alternative hypothesis for testing whether sunlight decreased the average breaking strength of the fishing line to below 10 pounds? b) Calculate the P-Value if a sample of 21 segments of fishing line that had been exposed to large...

A researcher is interested in seeing if the average income of rural families is different than...

A researcher is interested in seeing if the average income of rural families is different than that of urban families. To see if his claim is correct he randomly selects 60 families from a rural area and finds that they have an average income of $68428 with a population standard deviation of $775. He then selects 59 families from a urban area and finds that they have an average income of $69066 with a population standard deviation of $924. Perform...

A researcher is interested in seeing if playing violent video games leads to a change in...

A researcher is interested in seeing if playing violent video games leads to a change in aggressive attitudes. The researcher recruits an experimental group, who plays a violent video game for 1 hour, and a control group. Both groups complete a measurement instrument that measures their aggressive attitudes on a scale of 0-100. A. What type of study design is this (descriptive, correlational, or experimental)? B. What would be the appropriate statistical analysis to use in that situation (Chi-Square, Pearson...

We are interested in studying the performance of college students on statistics exams. In any given...

We are interested in studying the performance of college students on statistics exams. In any given semester, there are hundreds of students taking statistics in the department of psychology, mathematics, business, or other related departments that offer a course on statistics. We randomly select 20 students from the roster of all students enrolled in statistics for the spring semester and administer questionnaires throughout the semester, as well as collect their assignment and exam grades. In our first analysis, we are...

TABLE 12-11 The director of admissions at a state college is interested in seeing if admissions...

TABLE 12-11 The director of admissions at a state college is interested in seeing if admissions status (admitted, waiting list, denied admission) at his college is independent of the type of community in which an applicant resides. He takes a sample of recent admissions decisions and forms the following table: Admitted Wait ADMITTED WAIT LIST DENIED TOTAL URBAN 45 21 17 83 RURAL 33 13 24 70 SUBURBAN 34 12 39 85 TOTAL 112 46 80 238 He will use...

The following question is based on scenario 2: Researchers are interested in seeing how sitting for...

The following question is based on scenario 2: Researchers are interested in seeing how sitting for long periods of time can influence cardiovascular health. They ask people how many hours per day they sit, and then they measure their blood pressure to see if they are associated. They expect that as hours spent sitting increases, blood pressure will also increase. A. What is the best statistical test to use to analyze the hypothesis in scenario 2? Structural Equation Model z-test...

Explain speed of light, and why, when we look at celestial objects, we are not seeing...

Explain speed of light, and why, when we look at celestial objects, we are not seeing them the way they are right now but the way they were in the past.

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