A telephone company wishes to determine the percentage of homes with telephone answering ma What sample size is required to have a maximum error to be within 4% of the population proport with 99% confidence?

Q: How big of a sample needs to be taken in order to estimate the proportion of children in a community…

A:

Q: What is the chi-square value for the region to the right for a 999% confidence interval if the…

A: From the given information, the test is right-tailed, n=30

Q: Suppose you use simple random sampling to select and measure 50 turtles' weights, and find they have…

A:

Q: How large of a sample is required for a poll to have an error of less than 1.2% at a 90% confidence…

A: Given that  Margin of error =E =1.2%=0.012 90% confidence level.

Q: If n=130 and p (p-hat) =0.53, find the margin of error at a 99% confidence level Give your answer to…

A: The sample size is .The sample proportion is .The confidence level is .

Q: Consider 13 motorcycles out of 260 vehicles traveling through Organ Pipe National Park. If n = 260…

A:

Q: There is a study to be done on the mean duration of phd students at small universities. What is the…

A: The standard deviation is 42 months, the margin of error is 12 months and confidence level is 99%.

Q: a)  A histogram of time spent eating and drinking each day is skewed right. Use this result to…

A: From given data we have : sample size n = 1072 mean x=1.35 standard deviation σ=0.53

Q: Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.00 for…

A: Solution

Q: How large of a sample is required for a poll to have an error of less than 1.5% at a 95% confidence…

A: Given:

Q: A simple random sample of size n=400 individuals who are currently employed is asked if they work at…

A: It is given that sample size (n) is 400 and x is 41.

Q: If n=330 and p (p-hat) =0.92, find the margin of error at a 99% confidence level Give your answer to…

A:

Q: Find the margin of error E assuming that a simple random sample is used to estimate a population…

A: The margin of error is a statistic expressing the amount of random sampling error in the results of…

Q: What is the minimum sample size needed to construct a 95% confidence interval of the population…

A: Solution: From the given information, confidence level is 0.95 and E=0.05.

Q: When 38 campers are randomly selected and surveyed, it was found that the average number that prefer…

A: The summary of statistics is, x¯=24,σ=10.7,n=38 Critical values: By using the z-tables, the critical…

Q: The Coordinator of a Statistics unit has drawn a random sample of 12 undergraduates and asked how…

A: Hello! As you have posted more than 3 sub parts, we are answering the first 3 sub-parts.  In case…

Q: Suppose that a garage samples 20 customers. They find the average time for there oil change is 4,206…

A: The objective of this question is to find the lower bound of the 90% confidence interval for the…

Q: Suppose that a garage samples 20 customers. They find the average time for there oil change is 4,029…

A: The objective of this question is to find the upper bound of the 90% confidence interval for the…

Q: Determine the sample size necessary to construct a 75% confidence interval with an error of 0.06 if…

A: sample proportion()=confidence level=75%Margin of error(E)=0.06

Q: If n=160 and ˆp (p-hat) =0.48, find the margin of error at a 99% confidence level

A: Given Data: p^=0.48n=160   We know that, p^-pp^(1-p^)n~ Normal(0,1)

Q: What sample size do they need to use if they want to estimate the proportion of branches with ATM’s…

A: The provided information are: Confidence level = 95% = 0.95 So, significance level (alpha) = 1-0.95…

Q: If n=360 and p (p-hat) =0.29, find the margin of error at a 95% confidence level Give your answer to…

A: Given that : Sample size (n) = 360 P(hat) = 0.29 Confidence interval is 95%  We use here, Margin of…

Q: nstruct a 99% confidence interval for the population mean distance driven per year. A claim is made…

A: As the population standard deviation is not known,  we will use t Distribution. The number of…

Q: You measure 48 watermelons' weights, and find they have a mean weight of 60 ounces. Assume the…

A: From the provided information,Confidence level = 95%

Q: What is the sample size required to construct a 90% confidence interval for the population mean with…

A: Given,E=0.2z-value at 90% confidence is Zc=1.645Let the last two digits of your student ID is…

Q: If n=130 and ôp (p-hat) =0.93, find the margin of error at a 99% confidence level Give your answer…

A: Here, the margin of error for proportion p^ is to be calculated. The formula is given by, z*p^1-p^n,…

Q: A statistics teacher started class one day by drawing the names of 10 students out of a hat and…

A: The 95% confidence interval estimate for the true mean number of pushups that can be done is,

Q: A simple random sample of size n=350 individuals who are currently employed is asked if they work at…

A: Given, The sample proportion is,

Q: A simple random sample of size n equals 450 individuals who are currently employed are asked if they…

A: Given that, The sample proportion is, Critical values: By using the standard normal table of Z,…

Q: If a school district takes a random sample of 71 Math SAT scores and finds that the average is 460,…

A: Given : n = 71 Mean = 460 Standard deviation = 100 Confidence level = 99%

Q: If n=340 and p (p-hat) =0.23, find the margin of error at a 95% confidence level Give your answer to…

A: Given,n=340p^=0.23α=1-0.95=0.05α2=0.025Z0.025=1.96

Q: reate a 95% confidence interval for a population proportion from a sample of size 71 with sample…

A: