2 years ago

Unit 7 lesson 2 7th grade math

Mathematics

2 answers:

Gala2k [10]2 years ago

7 0

This unit and lesson is about Opening up resources!

Hope this helps!

shutvik [7]2 years ago

7 0

It will go by in a flash

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Dean Halverson recently read that full-time college students study 20 hours each week. She decides to do a study at her universi

romanna [79]

Answer: The p-value is 0.154.

Step-by-step explanation:

Since we have given that

We claim that

Null hypothesis :

$H_0:\mu=20$

Alternate hypothesis :

$H_1:\mu$

Population mean = 20 hours

Sample mean = 18.5 hours

Sample standard deviation = 4.3 hours

Sample size n = 35

So, test statistic would be

$z=\dfrac{\bar{X}-\mu}{\dfrac{\sigma}{\sqrt{n}}}\\\\z=\dfrac{18.5-20}{\dfrac{4.3}{\sqrt{35}}}\\\\z=\dfrac{-1.5}{0.726}\\\\z=-2.066$

So, the p value would be 0.154.

Hence, the p-value is 0.154.

4 0

4 years ago

HELP PLS I HABE BEEN STARING AT THUS QUESTION FOR SO LONG

kari74 [83]

Answer:

56%

Step-by-step explanation:

Reducing the picture by 80% and then by 70% gives a reduction of 56%

70% of 80 = 0.7 × 80 = 56%

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4 years ago

What yourss????????????????

alex41 [277]

The rectangel is it. Trust me

6 0

3 years ago

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Urgent!!!⚠️⚠️⚠️⚠️⚠️⚠️⚠️It takes 46 pounds of seed to completely plant a 5 acre field how many pounds of seeds are needed per acr

valina [46]

Answer:

The amount of pounds of seeds that are needed per arce are 9.2

4 0

3 years ago

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How do I solve this<br> Thanks

jeyben [28]

Answer:

-8

Step-by-step explanation:

-8 * (-2) - 4 * (6) =

16 - 24

f(1) = -2

g(4) = 6

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3 years ago