How to evaluate 8P7?

Lucian Maddox
2022-06-29
Answered

How to evaluate 8P7?

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Let X represent the difference between the number of heads and the number of tails obtained when a coin is tossed n times.

What are the possible values of X?

What are the possible values of X?

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Based on the Normal model N(100, 16) describing IQ scores, what percent of peoples

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Let X be a normal random variable with mean 12 and variance 4. Find the value of c such that P{X>c}=.10.

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If you flip a fair coin 10 times, what is the probability that it lands on heads exactly 4 times?

asked 2021-09-03

The latest poll of randomly selected Pennsylvanians indicates that the probability of someone
coming from a rural background is .65, the probability of coming from an urban background is
.20, and the probability of coming from a background described as neither is .15

From a random selection of 20 Pennsylvanians, and assuming the data fit a binomial distribution

Find the probability that ?(7 < ? < 10) come from a background described as urban.

From a random selection of 20 Pennsylvanians, and assuming the data fit a binomial distribution

Find the probability that ?(7 < ? < 10) come from a background described as urban.

asked 2021-09-16

The probability that a regularly scheduled flight departs in time is 0.83, the probability that it arrives in time is 0.90 and the probability that it departs and arrives in time is 0.78. Find probability that

asked 2021-11-20

Uniaxial tensile tests were carried on a ceramic. The following strength values were obtained:

310, 380, 400, 415, 448, 455, 475, 489, 500, and 502.

a. Calculate the probability of survival or probability of failure for these data. What is the Weibull modulus? Also calculate the characteristic strength.

b. What is the tensile strength at$50\mathrm{\%}$ survival probability? If the volume was increased three fold, what would be the new strength value at $50\mathrm{\%}$ survival probability?

310, 380, 400, 415, 448, 455, 475, 489, 500, and 502.

a. Calculate the probability of survival or probability of failure for these data. What is the Weibull modulus? Also calculate the characteristic strength.

b. What is the tensile strength at