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3 years ago

5

Jana's best time in a swim race so far is 3.01 minutes. She wants to try to swim a distance of 0.02 minutes faster. If she is su

ccessful, what will be her new best time

1 answer:

My name is Ann [436]3 years ago

4 0

Jans new best time will be 2.99 minutes

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The statewide pass rates for ENGL&101 across Washington state community colleges is 68%. An instructor in the English depart

Mila [183]

Answer:

<em>The calculated value Z=1.2413 < 1.96 at 0.05 level of significance</em>

<em>Null hypothesis is accepted </em>

<em>An instructor in the English department at CBC believes rates at CBC may be equal to the state average</em>

Step-by-step explanation:

<u><em>Step(i):-</em></u>

<em>Given Population proportion </em>

<em> P=68%= 0.68</em>

<em>Sample proportion </em>

<em> </em> $p^{-} =\frac{x}{n} = \frac{179}{250} = 0.716$ <em></em>

<em>Null hypothesis : H₀ : p = 0.68</em>

<em>Alternative Hypothesis :H₁ : p > 0.68</em>

<u><em>Step(ii)</em></u><em>:-</em>

<em>Test statistic</em>

<em> </em> $Z = \frac{p^{-}-P }{\sqrt{\frac{P Q}{n} } }$ <em></em>

<em> </em> $Z = \frac{0.716-0.68 }{\sqrt{\frac{0.68 X 0.32}{250} } }$ <em></em>

<em> Z = 1.2413</em>

<em>Level of significance </em>

<em> </em> $Z_{0.05} = 1.96$ <em></em>

<em>The calculated value Z=1.2413 < 1.96 at 0.05 level of significance</em>

<em>Null hypothesis is accepted </em>

<em>An instructor in the English department at CBC believes rates at CBC may be equal to the state average</em>

<em></em>

<em></em>

6 0

4 years ago

It is always, sometimes, or never true. Explain your reasoning in words.<br> (a) 5 − 2 = 6

Burka [1]

Answer:

No

Step-by-step explanation:

5-2=3

Inverse/reciprocal =7

3 0

3 years ago

ryan makes 6 backpacks he uses 3/4 of cloth to make each backpack what is the total amount cloth ,in yards ryan use to make all

bulgar [2K]

You just multiply 6 times 3/4, .75, or 75%.

6 times .75 = 4.50 yards

8 0

4 years ago

Read 2 more answers

20 POINTS! WILL MAKE BRAINLIEST

SVETLANKA909090 [29]

1.a sphere with a radius of three units

By definition, the volume of a sphere is:
$V = ( \frac{4}{3} ) (\pi) (r ^ 3)
$
Substituting values we have:
$V=(\frac{4}{3})(\pi)(3^3)$
Rewriting we have:
$V = (4) (\pi) (3 ^ 2)

V = (4) (\pi) (9)

V = 36\pi$

2.a cone with a diameter of twelve units and a height of three units

By definition, the volume of a cone is given by:
$V = \frac{1}{3} (\pi) (r ^ 2) (h)
$
Substituting values we have:
$V = \frac{1}{3} (\pi) ((\frac{12}{2}) ^ 2) (3)
$
Rewriting we have:
$V = (\pi) (6 ^ 2)

V = 36\pi$

6 0

3 years ago

Find the slope and y-intercept of y=8x-7

ICE Princess25 [194]

$\bf \begin{array}{|c|ll}\cline{1-1}\textit{slope-intercept form}\\\cline{1-1}\\y=\stackrel{slope}{m}x+\stackrel{y-intercept}{b}\\\\\cline{1-1}\end{array}~\hspace{2em} y=\stackrel{slope}{8}x\stackrel{y-intercept}{-7}~~\begin{cases}m=8\\y-intercept = (0, -7)\end{cases}$

5 0

3 years ago