Determinations of saliva pH levels were made in two independent random samples of seventh-grade schoolchildren. Sample A children were caries-free while sample B children had a high incidence of caries. The results were as follows: A 7.14 7.11 7.61 7.98 7.21 7.16 7.89 7.24 7.86 B 7.36 7.04 7.19 7.41 7.10 7.15 7.36 7.57 7.19   Construct and interpret a 90% confidence interval for the difference between the population means.

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A: The hypothesized mean is 8 oz per serving.

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A: Answer :- (d) between 0,05 and 0.10 Followings are the explanation of the question

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A: Given: Julius conducted a very small study of the amount of sleep his dorm mates get each night and…

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A: By empirical rule: it says that for a normal distribution all observed data lies within three…

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A:

Q: 12.4 Four sports teams took a random sample of players regarding their GPAs for the last year. The…

A: The objective of this question is to determine if there is a significant difference in the GPAs of…

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A: Given: N=18 α=0.05 One-way ANOVA will be used here: Set Hypothesis:  H0: There is no difference in…

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A: a)   It is needed to test, whether the distribution of U.S. households fits the Dove Creek…

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A: The given data is : n1=250n2=238x=3.61y=3.26s1=1.3s2=1.1 Task is to compare the damage made by frost…

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A: The hypothesized mean is 18 mpg.

Q: d. Find the UCL for the x-chart. e. Find the LCL for the x-chart. f. Is this process in control?…

A:

Q: Listed below are the lead concentrations in μ​g/g measured in different traditional medicines. Use a…

A: Sample size(n)=10sample mean(x¯)=4.5+12+13.5+3.5+19.5+17+13+18.5+17.5+19.510sample…

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A: Note: According to Bartleby Expert guideline, we can answer only first three subparts of a question…

Q: Are college students who live in dormitories significantly more involved in campus life than…

A: Given :  X1 = 12.4 X2 = 10.2 S1 = 2.0 S2 = 1.9 N1 = 158 N2 = 173 To test whether college students…

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A:

Q: Exam grades of students in a class 65 students .... 0-74 8 students .... 81-100 27 students ....…

A: Given Exam grades of students in a classTo calculate the average we calculate the mid point of class…

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A: The data shows the absences among the four grades.

Q: Which research question below is appropriate for a related-samples t test?   a. to compare the…

A: Which research question below is appropriate for a related-samples t test?

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A: Given:   Sample Size Mean GPA Standard Deviation Students who are employed 184 3.12 0.49…

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A: Chi-Square Analysis A chi-square statistic is a method for testing how well a model matches actual…

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A:

Q: Julius has conducted a very small study of the amount of sleep his dorm mates get each night. He…

A: Given, Two samples are given, Testing of hypotheses are, H0 : μ1= μ2     There is no significant…

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A: Solution: Given information: n= 64 Sample size of workers x=12.50 Sample meanμ=$15.00 Population…

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A: Given information: The data represents the number of calories burned during 40-minute workouts for…

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A: There are two categorical variables which are age and destination. Age has freshman, sophomore,…

Q: Consider the following data sets: Which of the two data sets has larger standard deviation? I II…

A: Option a) is correct. Data set I has higher standard deviation.

Q: Suppose that a market research firm is hired to estimate the percent of adults living in a large…

A: Sample size = n = 500 Sample number of events = x = 421 Sample proportion = p̂ = x/n = (421/500)…

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A: The normal curve representing the distribution of the geography scores is symmetrical about the…