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goldfiish [28.3K]

3 years ago

11

Zach's step counter tracked how many steps he took each day for a week. Number of steps 2,000 4,000 6,000 8,000 10,000 What was

Zach's median number of steps?

1 answer:

swat323 years ago

7 0

The median of his steps will be five thousand

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Given the line below.

DerKrebs [107]

You need to find the slope of the line too. they use m to represent slope.
$m = \frac{(y2 - y1)}{x2 - x1} = \frac{ - 2 - 2}{ - 2 - 2} = \frac{ - 4}{ - 4} = \frac{1}{1}$
point slope equation is y - y1 = m(x -x1)
they said to use point (-2, -2)
y -(-2) = 1(x -(-2))
y +2 = 1(x +2)

3 0

3 years ago

Assume that you plan to use a significance level of α = 0.05 to test the claim that p1 = p2. Use the given sample sizes and numb

dezoksy [38]

Answer:

The calculated value Z = 3.775 > 1.96 at 0.05 level of significance

Null hypothesis is rejected

The Two Population proportion are not equal

<u>Step-by-step explanation</u>:

<em>Given first sample size n₁ = 677</em>

<em>First sample proportion </em>

<em> </em> $p^{-} _{1} = \frac{x_{1} }{n_{1} } = \frac{172}{677} = 0.254$ <em></em>

Given second sample size n₂ = 3377

<em>second sample proportion </em>

<em> </em> $p^{-} _{2} = \frac{x_{2} }{n_{2} } = \frac{654}{3377} = 0.1936$ <em></em>

<u><em>Null Hypothesis : H₀ :</em></u><em> p₁ = p₂.</em>

<u><em>Alternative Hypothesis : H₁</em></u><em> : p₁ ≠ p₂.</em>

Test statistic

$Z = \frac{p_{1} ^{-}-p^{-} _{2} }{\sqrt{P Q(\frac{1}{n_{1} } +\frac{1}{n_{2} }) } }$

where

$P = \frac{n_{1} p_{1} + n_{2} p_{2} }{n_{1}+n_{2} } = \frac{677 X 0.254+3377 X 0.1936}{677+3377}$

P = 0.2036

Q = 1 - P = 1 - 0.2036 = 0.7964

$Z = \frac{0.254- 0.1936 }{\sqrt{0.2036 X 0.7964(\frac{1}{677 } +\frac{1}{3377 }) } }$

Z = 3.775

<em>Critical value ∝=0.05</em>

<em>Z- value = 1.96</em>

<em>The calculated value Z = 3.775 > 1.96 at 0.05 level of significance</em>

<em>Null hypothesis is rejected </em>

<em>The Two Population proportion are not equal</em>

<em></em>

3 0

3 years ago

Which of the following statements is true?

VikaD [51]

Answer:

c

Step-by-step explanation:

if its incorrect i apologize

8 0

3 years ago

If ax2 + bx + c = 0, then x= ? (Hint: Quadratic Formula)

Finger [1]

Answer:

x = ± $\sqrt{\frac{b^{2} -4ac}{2a}$

It didn't insert but just look up the quadratic formula.

x = ± root [(b²-4ac]/2a]

3 0

3 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%

5 0

3 years ago

Read 2 more answers