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3 years ago

14

A bag contains 26 tiles, each marked with a different letter of the alphabet. What is the probability of being able to spell the

word math with four randomly selected tiles that are taken from the bag all at the same time?

1 answer:

stealth61 [152]3 years ago

7 0

26P4 is fine to start but needs to be adjusted

26P4
-------=26C4
4!

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Answer:

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Step-by-step explanation:

We have a sample of size n = 35, $\bar{x} = 92$ and $s = 5$ . As we want to construct a 95% confidence interval to estimate the value of the true population mean $\mu$ , we should use the pivotal quantity given by $T = \frac{\bar{X}-\mu}{S/\sqrt{n}}$ which comes from the t distribution with n - 1 = 35 - 1 = 34 degrees of freedom. Besides we should use the t-value $t_{\alpha/2} = t_{0.05/2} = t_{0.025} = 2.0322$ , i.e., regarding the t-distribution with 34 degrees of freedom, we have an area of 0.025 above 2.0322 and below the probability density function. The rationale behind this is that $P(-2.0322\leq T\leq 2.0322) = 0.95$ because of the simmetry of the t distribution.

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Answer:

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Step-by-step explanation:

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