A sample of size 10 is taken from the population of morel mushrooms and used to calculate an average height =4.6 centimeters. Suppose the sample standard deviation is calculated to be s 0.6. What is the margin of error for a 90% confidence interval? Round yoranswerto 3 decimal places
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- Average work for some employees is 98 hours per year. Use a random sample of 18 employees. The standard deviation is 5.6 hours. Check the claimthat it’s less than 100. Check the validity of this claim using 99% accuracy. Assume the variableis normally distributed. Round your final answers to the nearest 2 decimal places. Can you show your work on a dist. graph? Thank you!The wind on any random day in Bryan is normally distributed with a standard deviation of 5 mph. A sample of 16 random days had an average of 22mph. Find a 95% confidence interval to capture the true average wind speed.Use three decimals.Find the 95% confidence interval for the variance and standard deviation for the time it takes a state police inspector to check a truck for safety if a sample of 21 trucks has a standard deviation of 5.2 minutes. Assume the variable is normally distributed.
- if the population standard deviation is 1.6, then Find the standard deviation of x forb an SRS of 68 observationsQ1 1. The following spinner was spun 38 times. What is the probability of spinning A 16 times? Insert ImageAssume that a sample is used to estimate a population mean μ. Find the margin of error M.E. that corresponds to a sample of size 22 with a mean of 62.5 and a standard deviation of 9.6 at a confidence level of 80%.Report ME accurate to one decimal place because the sample statistics are presented with this accuracy. M.E. =
- The ages of a group of 138 randomly selected adult females have a standard deviation of 17.5 years. Assume that the ages of female statistics students have less variation than ages of females in the general population, so leto= 17.5 years for the sample size calculation. How many female statistics student ages must be obtained in order to estimate the mean age of all female statistics students? Assume that we want 95% confidence that the sample mean is within one-half year of the population mean. Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general population? The required sample size is (Round up to the nearest whole number as needed.)The average salary of 64 employee was 5400. Using historical data, we will assume that the population standard deviation is 280. Find the 95% confidence interval for the population mean salary. Select one: O a. 5400 ± 61.25 O b. 5400 + 68.60 O c. 5400 + 63.70 O d. 5400 + 66.15Suppose that textbook weights are normally distributed. You measure 48 textbooks' weights, and find they have a mean weight of 43 ounces. Assume the population standard deviation is 13.1 ounces. Based on this, construct a 90% confidence interval for the true population mean textbook weight. Round answers to 2 decimal places. Select an answer ✓ <