Do the values appear to support the legend that college students gain 15 pounds (or 6.8 kilograms) during their freshman year? Why or why not?
Do the values appear to support the legend that college students gain 15 pounds (or 6.8 kilograms) during their freshman year? Why or why not?
(1 point) In a survey of 109 subjects, each was asked to indicate how many text messages they send and receive each day. The sample consisted of those who chose to respond to the request posted on the StatCrunch website. Determine whether this sampling method appears to be sound or is flawed. Explain your answer.
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(1 point) In a study of the Gender Aide method of gender selection for soon-to-be expecting parents using fertility clinics, 1000 users of this method gave birth to 540 boys and 460 girls. There is about a 1% chance that such extreme results would occur if the method had no effect. Do the results appear to have statistical significance? Do they have any practical significance? Explain your answers.
(2 points) Determine whether the described value is a statistic or parameter.
(1 point) There are 50 states in the United States.
(1 point) In a random sample of households, it was found that 47% of the sampled households had high-definition televisions.
(2 points) Which of the four levels of measurement (nominal, ordinal, interval, or ratio) are most appropriate for the statements below?
(1 point) The movie Avatar was given 4 out of 5 stars.
(1 point) The following car models are used for crash testing: Chevrolet Cruze, Honda Civic, Mitsubishi Lancer, VW Jetta, Dodge Charger, Ford Fusion, Buick Lucerne.
(2 points) Identify which type of sampling method is used in the following scenarios (i.e. random, systematic, convenience, stratified, or cluster):
(1 point) When collecting data from different sample locations in a lake, a researcher uses the “line transect method” by stretching a rope across the lake and collecting samples at every interval of 5 meters.
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