9. If the population proportion is 0.6. A researcher wants the margin of error to be 0.20. and level of confidence is 90%.what is the required sample size?
Q: When estimating the minimum sample size required for a research, if we do not have the preliminary…
A: It is given that, preliminary estimate of proportion is not known.
Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A: Given data, P1 = 21.9% = 0.219 P2 = 14.4% = 0.144 E = 2% = 0.02 Z= value at 95% confidence is Zc =…
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Q: Based on that, the required sample size to estimate the population mean is equal to?
A: It is given that Margin of error E = 4 Level of confidence = 95% Population SD = 29 The critical…
Q: 1. A dermatologist wishes to estimate the proportion of young adults who apply sunscreen regularly…
A: From the provided information, Margin of error = 0.03 Confidence level = 90%
Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A:
Q: a) With no prior research, what sample size should you gather in order to obtain a 0.015 margin of…
A: When we don't have any prior information about the population proportion, we generally take it as…
Q: How large must the sample size be in order to estimate a true proportion to within one precentsge…
A: Solution: From the given information, confidence level is 0.90 and E=0.01.
Q: find the minimum sample size needed to estimate μ for the given values. Confidence level=95% E = 2…
A:
Q: How large must the sample size be in order to to estimate a true proportion to within one percentage…
A: Given that, Critical value: Using the z-table, the critical value at 90% confidence level…
Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A: c = 95% E = 2% = 0.02 p^1=0.215p^2=0.195
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Q: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 95%…
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Q: A researcher wishes to estimate, with 93% confidence, the percentage of people who own a home…
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Q: 9. Under what circumstances will the distribution of sample means be normal?
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Q: What sample size should be selected to estimate the proportion of out of state guests with a margin…
A: Margin of error, ME = 0.05 sample proportion, p̂ = 0.45 confidence level, c = 95 % = 0.95…
Q: #5 What sample size is needed to give a margin of error of ±4% in estimating a population…
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Q: Suppose that you are attempting to estimate the weight of 600 parts. In order to use the infinite…
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Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A: Given data: Confidence level = 90% To find: Required sample size
Q: For comparing two sample proportions, the parameters of the pooled estimate must be? A. not equal…
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Q: 4. If the sample size is 30 and the mean score for group one is 5.6, mean score for group two is…
A: Obtain the value of SS between of this study. The value of SS between the study is obtained below…
Q: 8. An educational research group wishes to estimate the proportion of all California community…
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Q: The sample size required is (Round up to the nearest integer.)
A: Here use formula of margin of error
Q: Suppose we wish to find the required sample size find a 90% confidence interval for the population…
A:
Q: intended population
A: A population is the entire group that you want to draw conclusions about Intended population:…
Q: As a manufacturer of golf equipment, the Spalding Corporation wants to estimate the proportion of…
A: From the provided information, Margin of error (E) = 0.025 Confidence level = 99% Assuming the…
Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A: a) Compute the required sample size using the formula: E=zα2 p⏞11-p⏞1n+p⏞21-p⏞2n Where 'E' is the…
Q: Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E.…
A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…
Q: Suppose that the standard error for the sampling distribution of the mean of time spent on an App…
A: From the provided information, Standard deviation of sampling distribution = 10 minutes when sample…
Q: A physical therapist wants to determine the difference in the proportion of men and women who…
A: Given Information: Confidence level = 90% = 0.90 Margin of Error E=5%=0.05 Sample proportion of…
Q: Use the given data to find the minimum sample size required to estimate the population proportion…
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Q: A physical therapist wants to determine the difference in the proportion of men and women who…
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Q: A television sports commentator wants to estimate the proportion of citizens who "follow…
A: Given Data: Margin of Error=0.22 p=0.54 z-value=1.96
Q: 2) Use the given data to find the minimum sample size required to estimate the population…
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Q: What is the target sample size for a population of 3,500 people with a standard value of 1.65 and a…
A: Solution-; Given: N=3500, Standard value (V)=1.65,sampleing error (Se)=0.10 We find the target…
Q: Provide a scenario for which you would use an independent sample t test. Also, explain in your own…
A: Introduction :- Here we have to explain Condition where independent sample t test can be applied…
Q: Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E.…
A: From the provided information, Sample size (n) = 353 Number of success (x) = 148 The sample…
Q: In preparing a report on the economy, we need to estimate the percentage of businesses that plan to…
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Q: At what confidence level will an estimate with margin of error + 1.4758 be for a sample size n2 30?
A: The following is the formula for Confidence interval when sample size n is large (i.e., n ≥ 30)…
Q: When estimating the size of a sample required to obtain a given confidence level with proportion…
A: Given Data: a) p is between 0.2 and 0.4 Estimate p=0.4+0.22=0.3
Q: 3. A government agency wishes to estimate the proportion of drivers aged 16–24 who have been…
A: Here is given that, margin of error is 1% = 0.01 Proportion is 0.12 We will use z-proportion to…
Q: In each of parts (a)-(c), we have given a likely range for the observed value of a sample proportion…
A: Hi! Thank you for the question, As per the honor code, we are allowed to answer three sub-parts at a…
Q: With what confidence can we assert that the sample mean does not differ from the true mean by more…
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Q: If no previous study has been done, give the sample size we should use to find p with a margin of…
A: From the provided information, Margin of error (E) = 0.02 The confidence level = 90% The sample…
Q: find the sample size if you have : margin of error =0.311 confidence level =95% p=0.5
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Q: The manager of a small supermarket chain wants to estimate the proportion of time stockclerks spend…
A: Assume that the population proportion is 0.5. It is known that the critical value for 98% confidence…
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Q: If you want to construct a 90% confident interval for a population mean such that it is within a…
A: The confidence interval for the mean is given by : CI = x¯ ± zα2 ×σn x¯ : sample mean σ :…
Q: How large must the sample size be in order to to estimate a true proportion to within one percentage…
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Q: A physical therapist wants to determine the difference in the proportion of men and women who…
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- Suppose an internet marketing company wants to determine the current percentage of customers who click on ads on their smartphones. How many customers should the company survey in order to be 90% confident that the estimated proportion is within five percentage points of the true population proportion of customers who click on ads on their smartphones?A hospital wants to estimate the percentage of admitted patients who receive Medicare benefits. If we want to estimate that percentage based on examination of randomly selected patient payment records, how many patient records must be examined in order to be 90% confident that we are within four percentage points of the population percentage?Does the proportion of Democrats who support Medicare for all appear to be substantially different than the 70% rate foir the general population? If so, why do you think that is?
- Suppose an internet marketing company wants to determine the current percentage of customers who click on ads on their smartphones. How many customers should the company survey in order to be 90% confident that the estimated proportion is within 2 percentage points of the true population proportion of customers who click on ads on their smartphones?What would be the total fire insurance premium for Best Hardware if their $655,000 building belongs in structural classification B? The contents are worth $830,250 and they received an area rating of 4. The rates per $100 are found in Table 19-4. (Round your answer to the nearest cent.)a nutritionist wishes to determine, within 3% the true proportion of adults who do not eat lunch. if he wishes to be 95% confident that his estimate contains the population poroption, how large a sample will be necessary? a previous study found that 15% of the 125 people surveryed said they did not eat lunch.
- By how many times does the sample size have to be increased to decrease the margin of error by a facgtor of 1/9?A quality control process finds 20.7 defects for every 6,900 units of production. What percent of the production is defective?A company wants to determine the frequency of the occurrence of invoice errors. Suppose that in a sample of 100 sales invoices, 10 contain errors. construct a 90% CI for the proportion error.
- A home is appraised at $329,000 and the buyer has negotiated a purchase price of $311,000. She hopes to mortgage$303,000. What is the loan-to-value ratio to the nearest percent? Is the lender likely to approve this mortgage without the buyer being required to purchase private mortgage insurance (PMI)? Loan-to-value ratio= %. Part 2 Is the lender likely to approve this mortgage without the buyer being required to purchase private mortgage insurance (PMI)? Choose the correct answer below. A. No, since the loan-to-value ratio is less than 80%, the buyer will likely be required to purchase PMI. B. Yes, since the loan-to-value ratio is less than 80%, the buyer will likely be required to purchase PMI. C. No, since the loan-to-value ratio is more than 80%, the buyer will likely be required to purchase PMI. D. Yes, since the loan-to-value ratio is more than 80%, the buyer will likely be required to purchase PMI.the first step in conducting a cooking loss test is to examine the required information given in the standard recipe along with the purchasing information regarding weight and cost. What are two additional pieces of information that are also needed?2. Adrian and Casey want to know how much recyclable trash their apartment building generates on a monthly average in order to figure out if they recycle enough or produce too much recycling.