30. Robberies Find the sample size needed to estimate the percentage of robberies in Texas that result in arrests. Use a 0.04 margin of error, use a confidence level of 80%, and assume that p and â are unknown.

Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

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Q: Assume that all​ grade-point averages are to be standardized on a scale between 0 and 5. How many​…

A: The sample mean is within 0.011 of the population mean, standard deviation is 1.25, and 98%…

Q: 47. A meteorologist who samples 13 thunderstorms found that the average speed at which the travelled…

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Q: The following sample data are from a normal population: 10, 8, 12, 15, 13, 11, 6, 5. What is the…

A: Given data is10,8,12,15,13,11,6,5sample size(n)=8sample mean(x¯)=10standard…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

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Q: Identify the level of confidence of the following level of significance.   8.9% 10% 1.1%

A: We need to identify the level of confidence of the following level of significance. Level of…

Q: 4. Consider the following random sample of diameter measurements (in inches) of 8 softballs: 4.64,…

A: Given information- Sample size, n = 8 Significance level, α = 0.1 The given sample is- 4.64…

Q: What value should be reported as the mean?

A: Given, Values 4.63 4.58 4.82 4.31 4.67 4.6

Q: Determine the margin of error for the confidence interval for the mean 68 < u < 85 The margin of…

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Q: A sample of 100000 people is desired to be drawn at 95% confidence level and 2.5% significance…

A: Given, population size = 100000 confidence level = 95% and significance level = 2.5%

Q: 7. Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune…

A: Given, Margin of error=0.09 Confidence level=98% p^=0.15

Q: (a) How many subjects are needed to estimate the mean number of books read the previous year within…

A: (a) From the partial table of critical values, the critical value corresponding to 90% is 1.645. The…

Q: A machine that produces a certain part for an airplane engine is monitored closely. In the past, the…

A: Givenp^=0.1Margin of error(E)=0.03α=1-0.99=0.01α2=0.005zc=zα2=2.5758          (from z table)

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

Q: 9. If the population proportion is 0.6. A researcher wants the margin of error to be 0.20. and level…

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Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Solution: Given information: p1^=0.219 Sample proportion of male p2^=0.197 Sample proportion of…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

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Q: Determine the margin of error for the confidence interval for the proportion: 0.557 < μ< 0.837 The…

A: It is given that the confidence interval for proportion is as follows: 0.557 &lt; µ &lt; 0.837.

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: 6. A researcher wishes to estimate, 99% confidence, the proportion of college professors with laptop…

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Q: In a study of government financial aid for college​ students, it becomes necessary to estimate the…

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Q: 7) The state education commission wants to estimate the proportion of tenth grade students that have…

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Q: 8. Which of the following is not needed in computing the minimum sample size for the estimation of…

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Q: a. If we want to estimate the population mean time for previews at movie theaters with a margin of…

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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: Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E.…

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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: Determine the margin of error for an 80% confidence interval to estimate the population mean with…

A: Given that  Confidence level (C) = 80%  Population standard deviation (σ) = 48   We know that…

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: use the given sample data and confidence level. In each case, (a) find the best point estimate of…

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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: 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 a study of government financial aid for college​ students, it becomes necessary to estimate the…

A: (a)compute sample size ( n ) = n=(Z/E)^2*p*(1-p) Z a/2 at 0.1 level of significance is = 1.645sample…

Q: The annual earnings​ (in dollars) of 35 randomly selected microbiologists are shown in the data…

A: Given information: The annual earnings (in dollars) of n = 35 randomly selected microbiologists are…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: To estimate the male proportion P1 = 0.223 and female proportion P2 = 0.198 Margin of Error E = 0.02…

Q: Explain the effect on the margin of error and hence the effect on the accuracy of estimating a…

A: Effect on margin of error: If the sample size increases, then the standard error of statistic…

Q: Determine whether the 121.803 value in the first  data set is an outlier for that set at the 95%…

A: Given data The Data set 1 values are 121.771 121.787 121.803 121.781

Q: Assume that a sample is used to estimate a population proportion p. Find the margin of error M.E.…

A: Given n=329 X=39

Q: etermine what percent of pre-kindergarten children ages 3 to 5 whose mother had a bachelor's degree…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: Calculate the sample size needed in order to estimate the true proportion of defective in a large…

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Q: how many subjects are needed to estimate the mean number of books read the previous year with six…

A: It is given that confidence level is 0.90, standard deviation is 11.3 and margin of error E is 6.

Q: How many subjects would be needed to ensure that a 95% confidence interval estimate of BMI had a…

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Q: 46. A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes…

A: Given, Total discs n = 1067 No of non defective = 993 No of defective = 1067 - 993 = 74

Q: 7. use the given confidence interval to find the margin of error and the sample proportion.  a.…

A: The objective is to find the margin of error and the sample proportion for the given confidence…

Q: You have been asked to estimate the proportion of households in Chicago that have two or more…

A: (a) Here, there is no information about the population parameter. Hence, use the conservative…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given Error, E=±0.05CL=0.99

Q: It is desired to draw a sample with a 95% confidence level and a 5% significance level from a…

A: The formula of finding a sample size(n) for a given population size and confidence interval is given…

Q: A bank wishes to estimate the mean credit card balance owed by its customers. The population…

A: We have to find sample size ....

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.