Assume that the TI generated a confidence interval for the population mean, 136 < μμ <150 What is the margin of error?   143 8 7 correct anser is not give

The ages of a group of 154 randomly selected adult females have a standard deviation of 18.2 years, Assume that the ages of female statistics students have less variation than ages of females in the general population, so let o = 18.2 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 98% 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.) Does it seem reasonable to assume that the ages of female statistics students have less variation than ages of females in the general population? O A. No, because statistics students are typically older than people in the general population. O B. No, because there is no…

a sample of n=300 male college freshmen has a mean weight of 160 with a standard devation of 11. how many of the 300 observed weights fall within (A)2 standard deviations of the mean? (B) 3 standard deviations of the mean? (C) 5/2 deviations of the mean? Show the interval in each case.

Suppose that the creatine kinase levels among healthy males are normally distributed with a standard deviation of 23 units Research shows that exactly L units -. What is the mean creatine kinase level in healthy males? Carry your intermediate 5% of the healthy males have a creatine kinase level above 153 computations to at least four decimal places. Round your answer to at least one decimal place. units

Air handling: The mean lifetime of a handheld leaf blower is reported to be 250 hours. A lawncare technician believes the actual lifetime to be less than 250 hours. A test is made of H:=250 versus H, : µ<250. The null hypothesis is rejected. State an appropriate conclusion. There (Choose one) venough evidence to conclude that the mean lifetime is (Choose one) ▼ 250 hours.

a baker makes cookies n= 50, mean = 10, s = 2. what is the lower bound for a 90% confidience interval for the mean number of cookies per bin?

Please show and explain the steps!

Assume that the weights of trout in a river are normally distributed. You randomly catch and weigh 20 such trout. The mean weight from your sample is 7.3 lb with a standard deviation of 0.9 lb. Test the claim that the mean weight of trout in this river is greater than 7 lb at a significance level of 0.01. Be sure to clearly identify your work, using appropriate notation at each step of the process, and summarize your final result in a complete sentence.

Suppose the 90% confidence interval for the mean SAT scores of applicants at a business college is given by [1,691, 1,838]. This confidence interval uses the sample mean and the sample standard deviation based on 25 observations. Use t value 1.711 in your calculations. [You may find it useful to reference the t table.] What are the sample mean and the sample standard deviation used when computing the interval? (Round final answers to 2 decimal places.) sample mean = 1,764.50 sample standard deviation=???   ANSWER IS NOT 358.95