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posledela
3 years ago
12

PLZ HELP!!!

Mathematics
2 answers:
aleksandr82 [10.1K]3 years ago
7 0

The range of scores in Ms. Biren’s class is greater than the range of scores in Mr. Hayes’s class.

This would mean there was likely more variety (variability) in Ms. Biren's class than Mr. Hayes's, which is what we know.

Ilya [14]3 years ago
5 0

Answer:

C: The range of scores in Ms. Biren’s class is greater than the range of scores in Mr. Hayes’s class.

Step-by-step explanation:

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The annual rainfall (in inches) in a certain region is normally distributed with = 40 and = 4. What is the probability that star
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Step-by-step explanation:

Solution:-

- Denote a random variable "X" The annual rainfall (in inches) in a certain region . The random variable follows a normal distribution with parameters mean ( μ ) and standard deviation ( σ ) as follows:

                          X ~ Norm ( μ , σ^2 )

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                          P ( X > 50 )

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                          P ( Z > ( x - μ )  / σ )

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                          P (  Z > ( 50 - 40 )  / 4 )

                          P (  Z > 2.5 )

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- The probability that it rains in a certain region above 50 inches annually. is defined by:

                           q = 0.0062 ,

- The probability that it rains in a certain region rains below 50 inches annually. is defined by:

                           1 - q = 0.9938

                           n = 10 years   ..... Sample of n years taken

- The random variable "Y" follows binomial distribution for the number of years t it takes to rain over 50 inches.

                          Y ~ Bin ( 0.9938 , 0.0062 )

- The probability that it takes t = 10 years for it to rain:

                         =  10C10* ( 0.9938 )^10 * ( 0.0062 )^0

                         = ( 0.9938 )^10

                         = 0.93970

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