How hard is it to reach a businessperson by phone? If p is the proportion of of calls. How many business phone calls should you include in a random sample to be 90% the point estimate will be within 0.02 from p? Business people can becreached by a single phone call approximately 18% of the time.

Q: You want to conduct a survey to determine the proportion of people who favor a proposed tax policy.…

A: From the provided information, We want to conduct a survey to determine the proportion of people who…

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A: Given dataError = 2.5% = 0.025Confidence level = 0.98

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Q: WHAT WOULD BE THE EFFECT OF TAKING A LARGE SAMPLE ON THE WIDTH OF THE INTERVAL?   a) the width of…

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Q: What is the percentile rank of a student who is enrolled in 15 credits? (Hint: This is the same…

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Q: 26) If the 85 percentile of a t-distrbution is 1.250, what is its degree of freedom? A. 3 В. 4 C.5…

A: 26) The percentile is 85th and t-distribution value is 1.250. From the t distribution table, locate…

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A: Let proportion be p=0.50 E=0.02 z-value at 95% confidence is Zc=1.96 n=?

Q: Based on historical data in Oxnard college, we believe that 39% of freshman do not visit their…

A: Given Information:p=39%=0.39c=95%=0.95Margin of error, E=3%=0.03

Q: A recent survey found that 58% of U.S. adults use their smartphones to research and shop for…

A: The expression is  The margin of error is given as 5.3%.

Q: Hi, Can you help me with this question? A survey of 600 non fatal accidents show that 261 involved…

A: We have given that,  Favorable cases (X) = 261 and sample size (n) = 600 Then,  We will find the…

Q: I want to estimate the proportion of college professors who believe in aliens. How many college…

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.95.

Q: The owner of a local bar specializing in alternative music wanted to determine the average age of…

A: t 95% confidence level, the z value is 1.96 which can be obtained by using the standard normal…

Q: John has integers 1:10. He randomly draws 5 without replacement and reasons that he could estimate…

A: Introduction: When the man chooses a sample of five numbers between 1 and 10, both inclusive,…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: From the given information,   Margin of error E= 0.01 Population proportion p= 0.33 Confidence level…

Q: The Bata Shoe Museum states that 16% of women wear shoes that are too small for their feet. A…

A: 16% women wear shoes that are too small for their foot. So, proportion of women wear shoes that are…

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A: It is given that margin of error (E) is 0.045 and the confidence level is 0.90.

Q: 2. "In a recent study, 65% of city residents support increased spending on recreation. The study is…

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A: Given: n= 567 ,x= 219.0 Need to find sample proportion.

Q: Fourty percent of all Americans drink bottled water more than once a week (Natural resources Defense…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

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Q: His .A Mean of population .B Mean of sample .C mode I need answer within 3 minutes with my best…

A: The solution is given below.

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A:

Q: Risa is studying dating behavior of college students. She asks students at her school how many…

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A:

Q: If you increase the sample size to 50 from 30, will the standard error of the mean be smaller or…

A: When increasing the sample size to 50 from 30, the standard error of the mean would be smaller…

Q: What important feature is missing in the following scenario?

A: Given: The confidence interval for proportion is, (17.8% , 22.4%) The sample size = n = 1028

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A: Solution

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A: We want to find P-value  n=25 , p=0.4 , p0=0.5

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A: We have given that  Population proportion p= 13%=0.13 Margin of error = 4.5% = 0.045 98 %…

Q: If we want to estimate the difference in two population proportions within 0.02 with 95% confidence…

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Q: You are interested in the effectiveness of a new sample of 7 people's blood pressure before and…

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Q: 60% of students entering four-year colleges receive a degree within six years. Is this percent…

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Q: You want to test whether the true proportion teenagers who can swim is below 1/4. In a random sample…

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Q: Fourty percent of all Americans drink bottled water more than once a week (Natural resources Defense…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: The given population proportion is 28%, confidence level is 98% and margin of error is 1.5%.

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A:

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you…

A: The confidence level is 90% Therefore, α = 0.10 and α/2=0.05. The margin of error is 0.02 The…

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.