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Problem: An automobile parts supplier manufactures a cylindrical engine part. The part is supposed to have an outside diameter of four centimetres. Parts with diameters that are too large or too small will not fit properly within the engine and must be discarded, resulting in a loss of time and materials. The quality control department routinely inspects the manufacturing process to determine if the parts are meeting the specification. The most recent random sample of 36 parts produced a sample mean of 4.005 cm. Assume that the population standard deviation of the diameter is known to be 0.014 cm. Is there sufficient evidence to suggest that the parts are not meeting the target diameter? Use the p-value method to conduct an appropriate hypothesis test at the 5% level of significance. Comment on the validity of your conclusion.
Fitting of simple linear regression equation - Given the student population for a school district over the past few years, find the prediction equation for this data.
which of the variables meet the conditions for a binomial distribution? select all that apply.a. the number of people
A company owns 400 laptops. Each laptop has an 8% probability of not working. You randomly select 20 laptops for your salespeople. What is the likelihood that they will all be broken?
the distribution of iq scores is normal with micro 100 and sigma 15. what proportion of the population has iq scores
in the game of parcheesi each player rolls a pair of dice on each turn. in order to begin the game you must throw a 5
Determine the critical regions for test in terms of the sample mean, what is the probability of a type II error for this test if the true mean is in fact 195 mg and what impact would reducing the sample size have on the type I and type II errors?
Draw ogives from the following data and measure the median value and compute the value of arithmetic mean
a sewage plant produces 50000 gallons a day. 20 of the time it produces in excess of 60000 gallons what is the
let x and y be discrete variates with joint probability function fxyk1x1y for x123
what is the probablitiy of getting a exactly one head b exactly one tail and c not b in 4 coin
Suppose the likelihood that any flight on Northwest Airlines arrives within 15 minutes of scheduled time is .90. We choose four flights from yesterday for study.
Find the range and the standard deviation of the times.
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