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A researcher at First Dates App wants to see if there is a relationship between the number of first dates a person has gone on in the last month and their rating of happiness. To find out, the researcher asks 300 registered users of the APP who are single to report the number of first dates they were on in the last month. Next, the participants are asked to rate their happiness on a scale from 1-7, with higher scores indicating greater happiness.
-Who is the population we are interested in studying?
-Who is the sample?
-Identify the independent variable.
-Identify the dependent variable.
-Identify the level of measurement for the independent variable.
-Identify the level of measurement for the dependent variable.
-What statistical test would be appropriate to analyze the data?
-What is the null hypothesis for this study?
-What is the alternative hypothesis for this study?
A biologist considered studying the effects of various environmental pollutants on the health of mice by using a 27- 4 fractional factorial design.
A July 2009 Pew Research Center survey asked a variety of science questions of independent random samples of scientists and the public at-large.
Based on this quote, what null hypothesis do you think was being tested? Make sure you use correct terminology regarding populations and samples.
assume that womens heights are normally distrubted with a mean 62.4 inches and a sd given by 2.6 inch.a. if a woman is
There is sufficient evidence to support the claim that the mean speed of all cars on that section of I-10 is greater than the posted speed limit of 70 mph.
Briefly summarize three key historical developments that have shaped the current status of the relationship between private security agencies and public law enforcement agencies. Discuss how these events impacted the primary functions of private s..
Criticize the following definitions in light of the eight rules for lexical definitions: - "Anchorperson" means an electronic media guru who has great looks but lessthan-average intelligence and who brings canned news to people incapable of reading..
Develop a trend line using the data in the table. Use this to forecast sales for each quarter of year 5. What does the slope of this line indicate?
A game involves selecting a card from a regular 52-card deck and tossing a coin. The coin is a fair coin and is equally likely to land on heads or tails.
Find the standardized score for a birth weight of 2500 grams for a child born one month early, using 2622 as the mean.
A Mistaken Accusation of Cheating Klein (1992) described a situation in which two students were accused of cheating on a multiple-choice medical licensing exam.
Random samples of 52 lots in Philadelphia, 38 lots in New York, 43 lots in Washington, and 47 lots in Baltimore lead to a computed test statistic value.
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