What sample size should you gather to achieve a 0.75 hour margin of error?

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

A: From the provided information, Population standard deviation (σ) = 50.9 Confidence level = 98%…

Q: Your company uses a very expensive machine to manufacture nuclear fuel rods.  The production process…

A: From the given information, the average of 3 milliards of radiation/week is emitted during the…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: From the Standard Normal Table, the z value for 90% level is 1.645.

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Solution: From the given information, confidence level is 0.98, σ=35.1 and E=2.

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A: Givenpopulation standard deviation(σ)=74.3margin of error(E)=1.5α=1-0.98=0.02α2=0.01Z0.01=2.3263…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: The population standard deviation is 70.4, margin of error is 5, and confidence level is 98%.…

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A:

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Given, You want to obtain a sample to estimate how much parents spend on their kids birthday…

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

A: Givenpopulation standard deviation(σ)=39.4Margin of error(E)=1.5α=1-0.98=0.02α2=0.01zα2=z0.01=2.3263…

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

A: Obtain the large sample size needed. The large sample size needed is obtained below as follows: Use…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Determine the number of parents needs to sample at the 98% confidence interval.   The number of…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A:

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

A: Population standard deviation is 50.6. The z-critical value for 95% confidence interval is 1.96…

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

A: Solution: From the given information, confidence level is 0.99, σ=71.3 and E=0.1.

Q: study of working actors looked at age and gender. One sample of 75 male actors had a mean age of 25…

A: Given that  Sample Mean 1 (\bar X_1)(Xˉ1​) = 2525 Sample Standard Deviation 1 (s_1)(s1​) = 22…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A:

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Given: Population standard deviation (σ) = 72.1 dollars Margin of error (E) = 4 dollars Confidence…

Q: ou want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Solution: Given information: σ=40.6 Population standard deviationsMargin of Error=E= 3 α=0.01 Level…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Solution: From the given information, confidence level is 0.90, σ=56.3 and E=2.

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: The sample size is obtained below: From the given information, the margin of error (ME) is 10…

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A:

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

A:

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

A: Given,population standard deviation(σ)=45.7margin of error(E)=10α=1-0.98=0.02α2=0.01Z0.01=2.3263

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

A: We want to find the value of sample size.

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: compute sample size  n  = (z a/2 *  s.d / me ) ^2

Q: In a recent study, the Centers for Disease Control and Prevention reported that diastolic blood…

A: The problem is asking us to find the 10th percentile and the third quartile of the blood pressures…

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

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Q: A random sample of adult female reaction times has a sample mean of x¯=394.3 milliseconds and sample…

A: We first find 140.5 is how many SD (standard deviation) away from the mean 394.3 So, 140.5 is 3SD…

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

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: The Mental Development Index (MDI) of the Bayley Scales of Infant Development is a standardized…

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

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Q: ou want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Since we know population standard deviation, use z-distribution to find z-critical value. Find…

Q: You would like to be 90% confident that your estimate is within 3 of the true population mean. How…

A: Provided information is, Population standard deviation is approximately σ=30.1, It is 90% confident…

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

A:

Q: You are a researcher studying the lifespan of a certain species of bacteria.  A preliminary sample…

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Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Solution: From the given information, confidence level is 0.99, σ=22.7 dollars and E=2.

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A:

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Solution: From the given information, confidence level is 0.90, σ=35.5 and E=4

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Given, σ=33.8 Margin of error= 4 dollar

Q: You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of…

A: Given: Earlier sample size = 35 Population standard deviation σ=5.8 Margin of error (E) = 0.5…

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

A: Based on previous evidence,you believe the population standarddeviation is approximately σ=72.1 and…