Assume that a sample is used to estimate a population mean μ. Find the 98% confidence interval for a sample of size 62 with a mean of 69.7 and a standard deviation of 13.4. Enter your answer as an open-interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place).

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 22 for the population…

A: Given information- Population standard deviation, σ = 22 Confidence interval = 0.90 Significance…

Q: Among those taking the Graduate Record Exam, 18 people are randomly selected. This group had a mean…

A: n = 18 s =140 mu = 550

Q: if a sample n = 16, mean = 10.3,standard deviation is 2.6. calculate a 95% confidence interval.

A:

Q: Assume that a sample is used to estimate a population mean μμ. Find the 98% confidence interval for…

A: Given: C.I.=98%n=41x¯=76.4s=18.2

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 22 for the population…

A: The given information, α = 0.10 ; E = 5 ; σ = 22 The critical value for the significance level α =…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 12 for the population…

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

Q: How large of a sample is required for a to construct a 90% confidence interval around a mean with an…

A: Given information- Population standard deviation, σ = 105 Let, Confidence interval = 0.90…

Q: laboratory tested 86 chicken eggs and found that the mean amount of cholesterol was x = 228 mg.…

A: We have to find sample size...

Q: A sample with 45 observations is taken. The mean is found to be 25, while the population standard…

A:

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

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population…

A: Given Standard deviation=10 Margin of error=3 95% confidence level

Q: Find the error bound for an unknown population mean or the margin of error that corresponds to a 85%…

A: Find the error bound for an unknown population mean or the margin of error that corresponds to a 85%…

Q: A random sample of 150 students has a grade point average with a mean of 2.86. Assume the population…

A: Given,      sample size n =150      Mean x-=2.86      standard deviation σ=0.78…

Q: A business school placement director wants to estimate the mean annual salaries 5 years after…

A:

Q: Assume that a sample is used to estimate a population mean μμ. Find the 99% confidence interval for…

A: Given Mean=44.8 Sample size=26 Standard deviations=17.4

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population…

A: Formula for sample size: From the given information, the population standard deviation is σ = 10,…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 14 for the population…

A: Given information- Population standard deviation (σ) = 14 Confidence interval = 0.90 Significance…

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 24 for the population…

A:

Q: An IQ test is designed so that the mean is 100 and the standard deviation is 14 for the population…

A: