At a local pool, a new swimming instructor (Teacher 1) is being evaluated by how many of his students pass a standard swimming test. Of his 30 students, 17 passed the test. However, the more experienced instructor (Teacher 2), who taught 85 students, had 62 pass the test. Is this enough evidence to show that the pass rate for Teacher 1's students is lower than that of Teacher 2's students? (Use a = .10)

Q: A medical researcher says that less than 72% of adults in a certain country think that healthy…

A: Given: H0:p≥0.72Z0 = 2.33p = 72% = 0.72p^= 70% = 0.70 Sample size (n) = 300Find the test statistic?

Q: Based on information from a previous study, r1 = 37 people out of a random sample of n1 = 97 adult…

A: The provided information are:

Q: To determine this, you test the following hypotheses:   Select one: H0:p1=p2 vs Ha:p1p2 H0:p1=p2…

A: From the given data  Option (4) is correct to test the hypothesis  ie, Null hypothesis:H0:p1=p2…

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A: Given that,possible chances (x)=40sample size(n)=50success rate ( p )= x/n = 0.8success…

Q: A sample of n = 81 scores is obtained from a population with µ = 80 and σ = 27. If the sample mean…

A: Given that, Sample size, n = 81 Z score = +2.33 μ=80 and σ=27

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A: In the given problem,  Jeffrey thinks that students on the baseball team who drink Sporty brand…

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A: It is given that the p-value is 0.004.

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A:

Q: For a one tailed test evaluating a treatment that is supposed to decrease scores, a researcher…

A: The null and alternative hypotheses are;The null hypothesis states that the scores are unaffected by…

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A: Explanatory variables are those which are used to find the value of a response variable or effect on…

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A: Given Information:  Mean consumption (u) = 58 quarts

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A: The question is about categorical data analysis Given : No. of boys under survey = 200 No. of…

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A: (A). Identify the independent and dependent variable: The researcher is interested to test whether…

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A: Given: Test Statistic = 2.201 P-value = 0.027

Q: Suppose that the 101 randomly selected eighth-grade students (mentioned in question 6) took a…

A: From the provided information, The test statistic t = -2.32 And p < 0.05

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A:

Q: Will improving customer service result in higher stock prices for the companies providing the better…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

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A: The formula of the standard error of the mean is,

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A: The sample size is n = 200 Proportion of shoppers who live more than 15 miles from that center in…

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A: To calculate: The risk ratio

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A: Solution: Given information: n= 115  Sample size  x= 46 success  p^=xn=46115=0.40 sample proportion…

Q: Based on information from a previous study, r1 = 38 people out of a random sample of n1 = 106 adult…

A:

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A: Given: Population mean IQ score using Stanford Binet intelligence test μ = 100 Population standard…

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A:

Q: A market research study conducted by a local winery on white wine preference found the following…

A: Let p1 denote the proportion of women who prefer white wine, p2 denote the proportion of men who…

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A: The different types of t test for two samples are: independent samples t test dependent samples t…

Q: Based on information from a previous study, r1 = 37 people out of a random sample of n1 = 97 adult…

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A: Here events are independent.

Q: determine with 95% confidence that his drug avoids diagnosis of insomnia as a side-effect?

A: Solution: Given that, Sample of size,n=65 Sample mean ,X_bar=6.6 Population s.d, sigma=1.1…

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A:

Q: In a survey by Bea et al., it was found that 218 of 1,062 urban residents had a history of allergic…

A: From the provided information,

Q: A researcher conducted a t-test for independent samples to evaluate the mean difference between two…

A:

Q: medical research team conducted a study to test the effect of a cholesterol reducing medication. At…

A: Note: Based on the instructions solving three subparts. Kindly repost the remaining questions…

Q: Based on information from a previous study, r1 = 34 people out of a random sample of n1 = 105 adult…

A: Given  r1=34, n1=105, r2=50, n2=105  p1^=r1/n1  p2^=r2/n2

Q: 31% of all pygmy softshell toises have stripes on their shells. A herpetologist in Cititon collects…

A:

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A:

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A:

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A:

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A:

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A: State the hypotheses.

Q: Will improving customer service result in higher stock prices for the companies providing the better…

A: Will improving customer service result in higher stock prices for the companies providing the better…

Q: Will improving customer service result in higher stock prices for the companies providing the better…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

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A: Given information- Sample size, n = 88 It is found that 8 of them suffer from asthma. So, x = 8 So…

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A: Given : x1= 60.0 n1= 100 x2= 40.0 n2= 75 significance level, 0.05

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A: The test hypotheses are given below: Null hypothesis:H0:p≤0.50 Alternative hypothesis:H1:p>0.50

Q: will improving customer service result in higher stock prices for the companies providing the better…

A: Note: As per my policy i can answer only three sub parts. kindly repost the remaining sub parts.…

Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.