Which is the smaller unit meter or centimeter

A phone manufacturer wants to compete in the touch screen phone market. Management understands that the leading product has a le

CaHeK987 [17]

Answer:

Step-by-step explanation:

Hello!

To compete in the touch screen phone market a manufacturer aims to release a new touch screen with a battery life said to last more than two hours longer than the leading product which is the desired feature in phones.

To test this claim two samples were taken:

Sample 1

X: battery lifespan of a unit of the new product (min)

n= 93 units of the new product

mean battery life X[bar]= 8:53hs= 533min

S= 84 min

Sample 2

X: battery lifespan of a unit of the leading product (min)

n= 102 units of the leading product

mean battery life X[bar]= 5:40 hs = 340min

S= 93 min

The population variances of both variances are unknown and distinct.

To test if the average battery life of the new product is greater than the average battery life of the leading product by 2 hs (or 120 min) the parameters of interest will be the two population means and we will test their difference, the hypotheses are:

H₀: μ₁ - μ₂ ≤ 120

H₁: μ₁ - μ₂ > 120

Considering that there is not enough information about the distribution of both variables, but both samples are big enough, we can apply the central limit theorem and approximate the distribution of both sample means to normal, this way we can use the standard normal:

$Z= \frac{(X[bar]_1-X[bar]_2)-(Mu_1-Mu_2)}{\sqrt{\frac{S_1^2}{n_1} +\frac{S_2^2}{n_2} } }$

Z≈N(0;1)

$Z= \frac{(533-340)-120}{\sqrt{\frac{84^2}{56} +\frac{93^2}{102} } }= 5.028$

I hope this helps!

3 0

4 years ago

Identify the sequence graphed below and the average rate of change from n = 0 to n = 2.

andrezito [222]

The answer would be: an = 10( one half )n − 1; average rate of change is negative fifteen halves.

This question is about exponent function/series. You are given 3 points from the function, point A (1,10), point B( 2, 5) and point C(4,1.25).
If you insert point A to the function, an = 10( one half )^n − 1 will give a result of 10 for n=1.

For n=0, the result would be:
an = 10( one half )^n − 1
an= 10(1/2)^0-1
an= 10(1/2)^-1= 10* 2= 20

Then the average rate of change from n=0 to n=2 would be:
Rate of change= (y2-y1)/ (x2-x1)
Rate of change= (5-20)/ (2-0)= -15/2= negative fifteen halves

3 0

4 years ago

Does 4(x−8)+12=2(2x−9) have one solution, no solution, or infinitely many solutions? ??

arsen [322]

Answer:

no solution

Step-by-step explanation:

8 0

3 years ago

Please help I need an answer really bad

NeTakaya

Answer: a) 145

b) 35

c) 145

d) 153

e) 27

f) 153

Step-by-step explanation:

The line in the center represents 180 degrees which is half of a circle. With the number 35, you can subtract that from 180 and you get your angle next to your 35 angle. (sorry if I sound confusing, Im not the best at explaining :)

7 0

4 years ago

Name an outcome that has a probability of 0.5

Lina20 [59]

Answer:

A coin toss

Step-by-step explanation:

if you flip one coin repeatedly like 10 to 10000 it can be 0.5

6 0

3 years ago