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3 years ago

13

A set of final examination grades in a calculus course was found to be normally distributed with a mean of 69 and a standard dev

iation of 9. What percentage of students scored between 65 and 89?

1 answer:

Lady bird [3.3K]3 years ago

7 0

Answer: 66%

Step-by-step explanation:

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Help me please!!!!!!!

xxTIMURxx [149]

Hmm, Its pretty blurry and nice cat but I will try for ya :D ***cant gurantee its gonna be correct***

6 3/4 =27/4
2/3= 0.666666666 (0.66)
1 3/4= 7/4
2 1/4 = 9/4

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2 years ago

Please help me *20 points*

Salsk061 [2.6K]

Answer:

36

Step-by-step explanation:

Frequency of less than 4:

6 + 4 + 8 = 18

Probability:

18/50 × 100 = 36%

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Step-by-step explanation:

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nata0808 [166]

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Step-by-step explanation:

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