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1. For a normal population with a known variance, suppose that an investigator believe that approximately 95% values are between 38 and 70. The appropriate sample size for estimating the true population mean μ within 2 units with 95% confidence level is approximately?
2. An archer claims that 25% of her shots will be in the center of the target(i.e. a bulls-eye). A sports writer plans to test this claim by sampling 300 shots. if the 300 shots result in 60 or fewer bulls-eye(i.e. 20% bulls-eye), the writer will reject the archer's claim. what is the probability that the sports writer will reject the archer's claim, when it is actually true?
As each electron is removed, one at a time, from an atom of aluminum, more ionization energy is required. Between which two successive ionization energies would you expect the greatest difference (largest change in value)?
an electronic switching device occasionally malfunctions and may need to be replaced. the device is considered
1. Break the function down by answering the following: a. How many terms are in the equation? b. Give the coefficients and the constants (label them).
We found our proportion of getting doubles was 15% to 16%. Using probability theory how often (i.e, what proportion of time) would you theoretically expect to roll doubles from 2 fair dice?
Determine the probability that 5 or less questionnaires will be returned? Compute also probability that 7 or more questionnaires will be returned.
the specifications on an electronic component in a target acquisition system are that its life must be between 5000 -
you are the member of a commission that studies the gender inequalities. from a survery you obtain that on a random
What is the probability of each sample in part (a), if each sample of size 2 is equally likely? Find the value of the ?nite population correction factor.
a random sample of 10 items is drawn from a population whose standard deviation is unknown. the sample mean is 270 and
A feedback control system is shown in Figure P8.8.The specification for the closed-loop system requires that the overshoot to a step input be less than 15%. (a) Determine the corresponding specification Mpω) in the frequency domain for the closed-..
a household is advertised as having more than 10-yr life. if the following is pdf determine its reliability for the
People in a large population average 60 inches tall. You will take a random sample and will be given a dollar for each person in your sample who is over 65 inches tall. Does the law of average relate to the answer you give?
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