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3 years ago

HELP PLEASEEEEEEEEEEE

Mathematics

1 answer:

Delvig [45]3 years ago

4 0

Answer:

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What is the value of x in the equation -6x= 5x+22? Mark this and return Save and Exit Submit

GREYUIT [131]

Answer:

x = -2

Hope this helps :)

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3 years ago

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Tina recorded the number of calories she burned during a bike ride. The graph shows Tina’s calories burned, y, after x hours. If

m_a_m_a [10]

Answer:

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Step-by-step explanation:

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3 years ago

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zimovet [89]

Answer:

Step-by-step explanation:

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3 years ago

A sample of students from an introductory psychology class were polled regarding the number of hours they spent studying for the

Anni [7]

Answer:

$8.68,13.16$

Step-by-step explanation:

Hint- First we have to calculate the mean and standard deviation of the sample and then applying formula for confidence interval we can get the values.

Mean of the sample is,

$\mu=\dfrac{\sum _{i=1}^{24}a_i}{24}=\dfrac{262}{24}=10.92$

Standard deviation of the sample is,

$\sigma =\sqrt{\dfrac{\sum _{i=1}^{24}\left(x_i-10.92\right)^2}{24-1}}=5.6$

The confidence interval will be,

$=\mu \pm Z\dfrac{\sigma}{\sqrt{n}}$

Here,

Z for 95% confidence interval is 1.96, and n is sample size which is 24.

Putting the values,

$=10.92 \pm 1.96\cdot \dfrac{5.6}{\sqrt{24}}$

$=10.92 \pm 2.24$

$=8.68,13.16$

Confidence interval is used to express the degree of uncertainty associated with a sample.

95% confidence interval means that if we used the same sampling method to select different samples and calculate an interval, we would expect the true population parameter to fall within the interval for 95% of the time.

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3 years ago

PLEASE ANSWER, I HAVE A QUIZ THAT NEEDS TO GET DONE AND I HAVE NO IDEA HOW TO GET THIS!

Oliga [24]

There you go. cube root of smth is just the value to the power of one third.

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3 years ago