The brand manager for a brand of toothpaste must plan a campaign designed to increase brand recognition. He wants to first determine the percentage of adults who have heard of the brand. How many adults must he survey in order to be 80​% confident that his estimate is within seven percentage points of the true population​ percentage? Assume that nothing is known about the percentage of adults who have heard of the brand.  What is n?

Q: The values listed below are waiting times​ (in minutes) of customers at two different banks. At…

A: Note: Hi there! Thank you for posting the question. As the data submitted by you has repeated…

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A: From the provided information, Margin of error (E) = 0.06 Confidence level = 95% The Z value at 95%…

Q: A statistics professor made the following histogram for the scores on her class’s first exam.   If…

A: From the Histogram, the scores and the corresponding frequencies are, Given that the passing score…

Q: a. The proportion of Pennsylvanians with a high school diploma is equal to 0.83. b. The proportion…

A:

Q: er the following questions. A 6.4 6.6 B 4.3 5.4 6.7 5.8 6.8 6.1 7.1 6.7 Click the icon to view the…

A: Given Data in excel sheet

Q: Assume that a sample is used to estimate a population mean μμ. Find the 98% confidence interval for…

A: It is given that  Sample mean = 54.4 Sample standard deviation = 16.6 Sample size = 74

Q: What is the most frequent number of over-the-limit items for this data set? ans = What is the…

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Q: Suppose a researcher wants to estimate the population proportion of defective light bulbs. He took a…

A:

Q: Select the statement below that gives an example of a statistic.

A: Select the statement below that gives an example of a statistic. 1): According to census data, about…

Q: A searcher is interested in if there is a relationship between whether a student enjoys mathematics…

A: Given: α=0.025 The observed values are given as   Maths: Yes  Maths: No Total Stats: Yes  70 49…

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: The formula for the sample size is as follows: Here,zα/2 is the critical value at 95% confidence…

Q: (a) Identify the null and alternative hypotheses. (b) Determine if the sample size is large enough…

A: The following information is provided: The sample size is N=631N = 631, the number of favorable…

Q: A researcher wishes to estimate the number of households with two cars. How large a sample is needed…

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Q: The values listed below are waiting times (in minutes) of customers at two different banks. At Bank…

A: Given Data for Bank A6.4,6.6,6.7,6.8,7.1,7.3,7.5,7.9,7.9,7.9sample size(n)=10confidence level=95%

Q: Using the table, what is its exact kurtosis in population , excess kurtosis of the population +…

A: Given  n=∑f=30 ∑fx=590 ∑x-x¯2f=746.667 ∑x-x¯3f=259.68 ∑x-x¯4f=55418.97

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A:

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A:

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Given, Confidence level, C = 95% = 0.95So, level of significance, α = 1-0.95 = 0.05Margin of error,…

Q: Jennifer wants to estimate the percentage of parents that use cloth diapers. She asks a randomly…

A: Solution: It is given that Jennifer wants to estimate the percentage of parents that use cloth…

Q: Suppose that 18% of a random sample of 2307 Miami residents said that they will donate blood in…

A: p =0.18 n = 2307

Q: At the Fredericton High School it is estimated that at most 25% of the students ride bikes to…

A: Let, p = proportion of students who ride bikes to school

Q: Use the following information to answer the next five exercises. A doctor wants to know if a blood…

A: The question is based on a hypo. testing of a paired data set Given :

Q: he brand manager for a brand of toothpaste must plan a companion to increase brand recognition. He…

A: Given Information: Confidence level = 95% = 0.95 Significance level α=1-0.95=0.05 Margin of Error…

Q: number of hours per week that the television is turned on is determined for each family in a sample.…

A: Given that  Mean = 30 Median = 26.2

Q: Sleep apnea is a disorder in which you have one or more pauses in breathing or shallow breaths while…

A: Answer Given Favorable cases [x] =210Sample size [n] =420

Q: A sample of 276 people was surveyed. People are classified according to their political ideology…

A: Given Data : Number of right wing people = 47 + 25 + 19 = 91 Number of people who are indifferent…

Q: Use the expression in the accompanying discussion of sample size to find the size of each sample if…

A:

Q: The brand manager for a brand of toothpaste must plan a campaign designed to increase brand…

A: Here given that confidence interval = 95%Margin of error = 5% = 0.05assuming sample is large enough…

Q: America OnLine published a survey question. Among the 2,300 Internet users who responded, 20%…

A: From the given information, America OnLine published a survey question. Among the 2,300 Internet…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.