Asha owns a car-wash and is trying to decide whether or not to purchase a vending machine so customers can buy coffee while they wait. She'll get the machine if she's convinced that more than 30% of her customers would buy coffee. She plans on taking a random sample of n customers and asking them whether or not they would buy coffee from the machine, and she'll then do a significance test using α=0.05 to see if the sample proportion who say "yes" is significantly greater than 30%. Suppose that in reality, it is actually 33% of her customers that would buy coffee. Which of the changes below would result in the highest power for her test?

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A: Given information: Percentage of the respondents who stated that they talk to their pets on the…

Q: Suppose it is claimed that the proportion of OSU students who belong to a fraternity or sorority is…

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Q: When two births are randomly​ selected, the sample space for genders is​ bb, bg,​ gb, and gg. Assume…

A: The given sample space is {(bb), (bg), (gb), (gg)}

Q: In a survey, 31% of the respondents stated that they talk to their pets on the telephone. A…

A: Given that n =150 ,p = 0.31

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A: Given,n=345x=25p^=xnp^=25345=0.0725α=0.05

Q: When two births are randomly​ selected, the sample space for genders is​ bb, bg,​ gb, and gg. Assume…

A:

Q: A national publishing house claims that 45% of all weekly magazine readers in South Africa read…

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Q: i want Z

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A:

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A:

Q: respond favorably to a new advertisement than the people in the western part of her country. She…

A:

Q: In a survey of working parents (both parents working), one of the questions asked was "Have you…

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A:

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: Here we need to calculate the value of the Z statistic.

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Q: 12) A pharmaceutical company wants to test whether Aspirin 1 is as effective as Aspirin 2. A random…

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Q: A healthcare provider saw that 48% of their members received their flu shot in a recent year. The…

A: Solution   p be the population proportion

Q: The table below summarizes data from a survey of a sample of women. Using a 0.05 significance level,…

A: Given data:

Q: In a recent study of a random sample of 113 people, 92 reported dreaming in color. In the 1940’s,…

A: Solution

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A: given  P0 =0.37 n=170

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A: From the provided information,

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Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

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Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

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Q: For the past several years, 55% of students at a particular college who lived on campus one year…

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Q: n a survey of families in which both parents work, one of the questions asked was, “Have you refused…

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Q: In a previous poll, 30% of adults with children under the age of 18 reported that their family ate…

A:

Q: When two births are randomly selected, the sample space for genders is bb, bg. gb, and gg. Assume…

A: The given sample space is {(bb), (bg), (gb), (gg)}

Q: In a survey, 43% of the respondents stated that they talk to their pets on the telephone, A…

A: The hypothesized proportion is 0.43.

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A: *Type I error is denoted with α level     i.e., α level  = level of significance    *Power of the…

Q: Is the proportion of wildfires caused by humans in the south higher than the proportion of wildfires…

A:

Q: A polling company conducted a hypothesis test to see if people are happy with the government, and…

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Q: In a survey, 45% of the respondents stated that they talk to their pets on the telephone. A…

A: From the provided information, The test statistic value z = -0.52. Level of significance (α) = 0.01

Q: In a survey, 37% of the respondents stated that they talk to their pets on the telephone. A…

A:

Q: When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume…

A: When two births are randomly selected, the sample space for genders is bb, bg, gb, and gg. Assume…

Q: The director of student services at Oxnard College is interested in whether women are more likely to…

A: There are two independent samples which are women and men. We have to test whether women are more…

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.