Dy Interactions in a children's museum. Refer to the Childhood Education Journal (Mar. 2014) stu interactions in a children's museum, Exercise 2.19 (Interactions by visitors to the museum included and-tell, learning, teaching, refocusing, participato advocating, and disciplining interactions.) Recall t researshers obseryed a sample of 170 meaningful

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d. Explain the meaning of the phrase "90% conf
7.60 Interactions in a children's museum. Refer to the Early
Childhood Education Journal (Mar. 2014) study Of
interactions in a children's museum, Exercise 2.19 (p. 41).
(Interactions by visitors to the museum included show-
and-tell, learning, teaching, refocusing, participatory play,
advocating, and disciplining interactions.) Recall that the
researchers observed a sample of 170 meaningful interac-
tions, of which 81 were led by children and 89 were led by
adult caregivers.
a. Give a point estimate of the true proportion of all
meaningful interactions in a children's museum that are
by
ildren.
b. Form a 90% confidence interval around the proportion,
part a.
c. Interpret the interval, part b, in the words of the study.
d. Suppose an educator claims that the true proportion of
all meaningful interactions in a children's museum that
are led by children is 35%. Make an inference about this
claim.
7.61 Is Starbucks coffee overpriced? The Minneapolis Star
Tribune (Aug. 12, 2008) reported that 73% of Americans
say that Starbucks coffee is overpriced. The source of
this information was a national telephone survey of 1,000
American adults conducted by Rasmussen Reports.
a. Identify the population of interest in this study.
b. Identify the sample for the study.
c. Identify the parameter of interest in the study.
d. Find and interpret a 95% confidence interval for the
parameter of interest.
.62 Nannies who work for ceļehrities The
Transcribed Image Text:d. Explain the meaning of the phrase "90% conf 7.60 Interactions in a children's museum. Refer to the Early Childhood Education Journal (Mar. 2014) study Of interactions in a children's museum, Exercise 2.19 (p. 41). (Interactions by visitors to the museum included show- and-tell, learning, teaching, refocusing, participatory play, advocating, and disciplining interactions.) Recall that the researchers observed a sample of 170 meaningful interac- tions, of which 81 were led by children and 89 were led by adult caregivers. a. Give a point estimate of the true proportion of all meaningful interactions in a children's museum that are by ildren. b. Form a 90% confidence interval around the proportion, part a. c. Interpret the interval, part b, in the words of the study. d. Suppose an educator claims that the true proportion of all meaningful interactions in a children's museum that are led by children is 35%. Make an inference about this claim. 7.61 Is Starbucks coffee overpriced? The Minneapolis Star Tribune (Aug. 12, 2008) reported that 73% of Americans say that Starbucks coffee is overpriced. The source of this information was a national telephone survey of 1,000 American adults conducted by Rasmussen Reports. a. Identify the population of interest in this study. b. Identify the sample for the study. c. Identify the parameter of interest in the study. d. Find and interpret a 95% confidence interval for the parameter of interest. .62 Nannies who work for ceļehrities The
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