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In designing a new space vehicle, NASA needs to decide whether to provide 0, 1 or 2 backup systems for a critical component of the vehicle. The first backup system, if included, comes into use only if the original system fails. The second backup system, if included, comes into use only if the original system and the first backup system both fail. NASA engineers claim that each system, independent of the others, has a 5% chance of failing if called into use. Each backup system costs $35,000 to produce and install within the vehicle. Once the vehicle is in flight, the mission will be scrubbed (ended early) only if the original system and all backups fail. The cost of a scrubbed mission, in addition to production costs, is assessed to be $10,000,000. How many backup systems are needed to minimize NASA's expected total cost?
What are the coefficients of the equations? Plot the experimental data along with the curves predicted by the linear regression analyses, and find the value of y at your data point using the three curve fitting schemes.
For the system of Problem P10.30, use a phase-lag compensator and attempt to achieve a phase margin of approximately 50°. Determine the actual overshoot and peak time for the compensated system.
Repeating this experiment many times with different samples, what values for the sample means would be possible? What values would repeat more often?
Large non-normal population with a mean of 10 and variance of 16, what would be the mean, variance, standard deviation and shape of the distribution of sample means? Give reasons for your answers.
The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall semester on the basis of past experience, What is the expected number of admissions for the fall semester
As part of a safety check, the Keystone Cops randomly stopped 65 ambulances and checked their tire pressure. The sample mean was 32 lbs/sq. in. with a sample standard deviation of 2 lbs/sq. in. Find the 98% confidence interval for the population m..
Here is my data: these are the wages for women with a 2 yr degree, $11,702, $24,509, $34,746, $35,185 (median of $29,627) These are the wages for women with a 4 yr.
The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. Each year, the survey contains several questions meant to probe respondents' views of employment.
in a survey of 1116 people 866 people said that they voted in a recent presidential election voting records show that
You plan to see a movie this weekend. Based on these movies, how long do you expect a typical movie to run?- Would you be surprised to find that your movie ran for 2 1/2 hours (150 minutes)?
What score would Sandra need to beat 91 percent of her mathematics class? The mean score was 73, and the standard deviation was 12.
The records show that 8% of the items produced by a machine do not meet the specifications. Use the normal approximation to the binomial distribution to answer the following questions.
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