Ask question

Ask question

All categories

4 years ago

6

Claim: Most adults would erase all of their personal information online if they could. A software firm survey of 582 randomly se

lected adults showed that 64% of them would erase all of their personal information online if they could. Find the value of the test statistic. The value of the test statistic is nothing. (Round to two decimal places as needed.)

1 answer:

Sergeeva-Olga [200]4 years ago

8 0

Answer:

6.76

Step-by-step explanation:

Let us create hypothesies as

$H_0: p =0.50\\H_a: p>0.50$

(right tailed test for claiming most adults would erase)

Sample proportion p = 0.64

n = sample size = 582

Std error of proportion= $\sqrt{\frac{0.5*0.5}{582} } \\=0.0207$

P difference = 0.14

Test statistic = p difference/std error

= 6.755

=6.76

You might be interested in

1. Solve: 6x - 12 < 6<br> 2. Solve: 2(3x-8) >8

8090 [49]

Answer:

Step-by-step explanation:

1. here you go mate

step 1

6x - 12 < 6 equation

step 2

6x - 12 < 6 simplify

6x-12+12<6+12

step 3

6x<18 Divide both sides

$\frac{6x}{6}$

answer

x<3

2. Here you go mate

step 1

2(3x-8) >8 equation

step 2

2(3x-8) >8 simplify

6x-16+16>8+16

step 3

6x>24 divide both sides

$\frac{6x}{6} >\frac{24}{6}$

answer

x>4

4 0

3 years ago

The table below shows the coordinates of a figure that was transformed. Which is a correct description of the transformation?

Hitman42 [59]

Answer:

B

Step-by-step explanation:

3 0

3 years ago

How do you solve the problem log8-2log6+log3

qwelly [4]

Calculator = -0.176091259

5 0

3 years ago

Read 2 more answers

a boy is standing on a pole of height 14.7m throws a stone upwards. it moves in a vertical line slightly away from the pole and

fomenos

Answer:

The time taken for the upward motion is 1 second. The same time is taken for the downward motion

It reaches a maximum height of 4.9 meters.

Step-by-step explanation:

The equation of motion is:

$x(t) = -4.9t^{2} + 9.8t$

Since the term which multiplies t squared is negative, the graph is concave down, that is, x increases until the vertex, where it reaches it's maximum height, then it decreases.

Vertex of a quadratic equation:

Quadratic equation in the format $x(t) = at^{2} + bt + c$

The vertex is the point $(t_{v}, x(t_{v}))$ , in which

$t_{v} = -\frac{b}{2a}$

In this question:

$x(t) = -4.9t^{2} + 9.8t$

So $a = -4.9, b = 9.8$

Vertex:

$t_{v} = -\frac{9.8}{2*(-4.9)} = 1$

The time taken for the upward motion is 1 second.

$x(t_{v}) = x(1) = 9.8*1 - 4.9*(1)^{2} = 4.9$

It reaches a maximum height of 4.9 meters.

Downward motion:

From the vertex to the ground.

The ground is t when x = 0. So

$-4.9t^{2} + 9.8t = 0$

$4.9t^{2} - 9.8t = 0$

$4.9t(t - 2) = 0$

$4.9t = 0$

$t = 0$

Or

$t - 2 = 0$

$t = 2$

It reaches the ground when t = 2 seconds.

The downward motion started at the vertex, when t = 1.

So the duration of the downward motion is 2 - 1 = 1 second.

5 0

3 years ago

Karen invested $2,000 in a special savings account.

WARRIOR [948]

Answer:

D. $512,000

Step-by-step explanation:

Well if the balance doubles every 5 years, then dividing 40 by 5 gives us the number of times the money will double, which is 8. We can then turn this into the equation $2000(2^{8})$ . $2^8$ can be simplified to 256. Multiply that by 2000 and we get our answer, 512000. Hope this helps!

<h2><em><u>Pls mark brainliest!</u></em></h2>

4 0

3 years ago