Assume that the monthly worldwide average number of airplaine crashes of commercial airlines is 2.2$2.2$. What is the probability that there will be) at most 2$2$ such accidents in the next 2$2$ months?

2022-04-01
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Assume that the monthly worldwide average number of airplaine crashes of commercial airlines is 2.2$2.2$. What is the probability that there will be) at most 2$2$ such accidents in the next 2$2$ months?

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Answered 2022-05-13
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Use the table for z or t-distribution to determine the value of z or t to construct a confidence interval for a population mean for each of the following combinations of confidence and sample size:

Confidence interval 90% n=37

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Let G be a finite group with $card\left(G\right)={p}^{2}q$ with $p<q$ two ' numbers. We denote $s}_{q$ the number of q-Sylow subgroups of G and similarly for p. I have just shown that ${s}_{q}\in \{1,{p}^{2}\}$. Now I want to show that

$\underset{S\in Sy{l}_{q}\left(G\right)}{\cup}S\setminus \left\{1\right\}={\dot{\cup}}_{S\in Sy{l}_{q}\left(G\right)}S\setminus \left\{1\right\}$

i.e. that for $S,\text{}T\in Sy{l}_{q}\left(G\right)$ with $S\ne T$ we that $\mathrm{S}\setminus \left\{1\right\}\cap \mathrm{T}\setminus \left\{1\right\}=\varnothing $

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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 121.1-cm and a standard deviation of 2.2-cm. For shipment, 26 steel rods are bundled together.

Find *P*91, which is the average length separating the smallest 91% bundles from the largest 9% bundles.*P*91 = -cm

Enter your answer as a number accurate to 2 decimal place. Answers obtained using exact *z*-scores or *z*-scores rounded to 3 decimal places are accepted.

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A bookstore is promoting two books, one costing $500, and the

another with a cost of $1000. Each time a customer enters, it is offered on two separate occasions buying a book. The customer buys a book in the first offer with probability 0.3, and one in the second with probability 0.6.

Let X be the random variable that measures the total amount of a customer's purchase, build the mass function probability of X.

asked 2022-03-30