The body weight of a healthy 3-month old colt should be about µ = 60kg Suppose you want to test the claim that the weight of a wild Nevada colt (3-months old) is more than 60 kg. State in words what a Type I Error is. State the mean weight of a wild Nevada (3-month old) colt is less than 60 Kg when in fact the mean weight of a wild Nevada colt (3-month old) is more than or equal to 60 kg.
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- A study was conducted assessing the effect of observer training on measurement of blood pressure based on NHANES data from 1999–2000 (Ostchega, et al., [1]). A goal was that the difference in recorded blood pressure between the observer and trainer be ≤ 2 mm Hg in absolute value. It was reported that the mean difference in systolic blood pressure (SBP) between observers and trainers (i.e., mean observer SBP minus trainer SBP) = mean (Δ) was 0.189 mm Hg with sd = 2.428 mm Hg. 1. If we assume that the distribution of Δ is normally distributed, then what % of (observer, trainer) pairs have a mean difference of ≥ 2 mm Hg in absolute value (i.e., either ≥ 2 mm Hg or ≤ −2 mm Hg)? 2. If we assume that the distribution of Δ is normally distributed, then what is the 90 percentile (i.e., the upper decile) and 10 percentile (i.e., the lower decile) of the distribution?The hospital record shows that the mean weight of newly born baby is 7 lbs with the standard deviation of 0.75 lbs. A researcher takes a sample of 25 newly born babies and found to have a mean weight of 6.73 lbs. Test the claim at 0.05 level of significance. (use T-test and ztest)A doctor wants to estimate the mean trigliceride level of all 20- to 29-year-old females (in milligram per deciliter, mg/dL). How many subjects are needed to estimate the mean trigliceride level within 4 mg/dL with 95% confidence assuming s=16.2 mg/dL from an earlier study?The doctor needs to sample at least ?? 20- to 29-year-old females.