Engineers at a distribution company believe that the average number of damaged packages shipped by air...
A cigarette manufacturer claims that the average nicotine content of their new brand XXX is at most 1.35 mg. It would be unwise to reject the manufacturer's claim without strong contradictory evidence. An appropriate problem formulation is to test A random sample of 100 brand XXX cigarettes are tested and the sample standard deviation and sample mean are found to be 0.07 mg and 1.361 mg, respectively. Assuming the central limit theorem applies and s ≈ σ, find the p-value...
Question 13 (1 mark) Attempt 6 The calibration of a scale is to be checked by weighing a 30kg test specimen. A random sample of 16 measurements yielded a sample standard deviation of 0.19 kg and sample mean 29.91 kg Assuming the central limit theorem applies and s o, find the p-value associated with the following hypothesis test. Ho H 30 versus Ha: u 30 Your answer can be rounded to four decimal digit accuracy when entered. p-value- Question 13...
Q1. Q2. Uhom a tion of 0.305. To monitor this Question 13 (1 mark) Attempt 1 The desired percentage of Silicon Dioxide (SiO2) in a certain type of aluminous cement is 5.4. Historically the percentage of SiO2 in the cement is normally distributed w process, periodically an engineer takes a random sample of 16 measurements. A recent sample yielded a sample mean of 5.228 Find the p-value associated with the following hypothesis test. Ho:u=5.4 versus H,: *5.4 Your answer can...
The desired percentage of Silicon Dioxide (SiO2) in a certain type of aluminous cement is 5.3. Historically the percentage of Sio2 in the cement is normally distributed with a standard deviation of 0.32. To monitor this process, periodically an engineer takes a random sample of 9 measurements. A recent sample yielded a sample mean of 5.481 Find the p-value associated with the following hypothesis test. Ho:H 5.3 versus Ha: 5.3 Your answer can be rounded to four decimal digit accuracy...
Newly purchased automobile tyres of a certain type are supposed to be filled to a pressure of 220 Nt/m. A recent random sample of 38 such Nt/m2 tyres from different cars operated by a large rental company yielded a sample standard deviation of 3.05 Nt/m and a sample mean of 221.04 Assuming the Central Limit Theorem applies and s σ, find the p-value associated with the following hypothesis test. Ho: μ-220 versus Ha: μ+ 220 Your answer can be rounded...
Question number 7 The ABC battery company claims that their batteries last 100 hours, on average. You decide to conduct a test to see if the company's claim is true. You believe that the mean life may be different from the 100 hours the company claims. You decide to collect data on the average battery life (in hours) of a random sample of n 20 batteries. Some of the information related to the hypothesis test is presented below. Test of...
Suppose a huge internet-based lighting company receives a shipment of several thousand boxes of light bulbs every Tuesday. Inspectors return the merchandise to the manufacturer if the proportion of damaged light bulbs is more than 0.06 (6%). Rather than inspect all of the packages, 100 boxes are randomly sampled. As long as at least 10 damaged and 10 undamaged light bulbs are found, a one-sample z-test is run with a significance level of 0.01 to see if the proportion of...