Answer:

**Answer:**

**Step-by-step explanation:**

Hello!

The objective is to test if there is a difference between the fuel economy of mid-size domestic cars and mid-size import cars.

For this there are two samples taken:

X₁: Fuel economy of a domestic car.

Sample 1

n₁= 17 domestic cars

X[bar]₁= 34.904 MPG

S₁= 4.6729 MPG

X₂: Fuel economy of an import car.

Sample 2

n₂= 15 import cars

X[bar]₂= 28.563 MPG

S₂= 8.4988 MPG

To estimate the difference between the average economic fuel of domestic cars and import cars, assuming both variables have a normal distribution and both population variances are unknown but equal, the statistic to use is a t-test for two independent samples with pooled sample variance:

(X[bar]₁-X[bar]₂)±

Sa= 6.73

(34.904-28.563)±

6.341±1.697*2.38

[2.30;10.38]

With a confidence level of 90%, you'd expect that the difference between the average economic fuel of domestic cars and import cars will be contained in the interval [2.30;10.38].

I hope it helps!

Annisa wrote an expression that represents“the product of 6.2 and the sum of 3c and 8.” What are the factors of the expression?

a trapezoids longer base is 4 times its shorter base. If the trapezoid has an area of 80 cm squared and a height of 8cm has what is the length of each base

Can you help me please

A university financial aid office polled a random sample of 528 male undergraduate students and 651 female undergraduate students. Each of the students was asked whether or not they were employed during the previous summer. 295 of the male students and 463 of the female students said that they had worked during the previous summer. Give a 80% confidence interval for the difference between the proportions of male and female students who were employed during the summer.A) Find the values of the two sample proportions (round to three decimals)B) Find the critical value that should be used in constructing the confidence interval.C) Find the value of the standard error. Round your answer to three decimal places.D) Construct the 95% confidence interval. Round your answers to three decimal places.

Solve the equation using a graphical method.t/3-1/2=t+3/9

a trapezoids longer base is 4 times its shorter base. If the trapezoid has an area of 80 cm squared and a height of 8cm has what is the length of each base

Can you help me please

A university financial aid office polled a random sample of 528 male undergraduate students and 651 female undergraduate students. Each of the students was asked whether or not they were employed during the previous summer. 295 of the male students and 463 of the female students said that they had worked during the previous summer. Give a 80% confidence interval for the difference between the proportions of male and female students who were employed during the summer.A) Find the values of the two sample proportions (round to three decimals)B) Find the critical value that should be used in constructing the confidence interval.C) Find the value of the standard error. Round your answer to three decimal places.D) Construct the 95% confidence interval. Round your answers to three decimal places.

Solve the equation using a graphical method.t/3-1/2=t+3/9

**Answer:**

The total cost is represented by the dependent variable.

**Step-by-step explanation:**

If we have a function:

x is the independent variable and y is the dependent one, since y is a function of x.

**In this problem:**

So the total cost of buying b cans of beans is 0.79b. That is, the total cost depends of the number of cans of beans bought.

So the total cost is represented by the dependent variable.

**Answer:**

It is 6. The student who got a two did not use order of operations.

**Step-by-step explanation:**

PEMDAS

You must do division before subtraction. 4/2 = 2.

8 - 2 = 6

The probability of not landing on blue is

2/3 or 66.666666...% is the probability of it not landing on blue

**Answer:**

1000/t=w

**Step-by-step explanation:**

The first thing we need to do is, multiply 1000 to both sides,

c(1000)=wtc

now we need to divide both sides by tc

c(1000))/(tc)=w

The c's on the left side will cancel out

**1****0****0****0****/****t****=****w**

**Step-by-step explanation:**

hdhdhdhdhddjdifififiifr

1.66666666667 inches per hour

**Answer:**

**0.625**

**Step-by-step explanation:**

15 divided by 24 which equals 0.625

**Answer:**

**n=3.8416≅4**

**So Minimum Sample Size is 4**

**Step-by-step explanation:**

In order to find the minimum sample size, the formula we use will be:

Where:

**n** is sample size

**Z** is the distribution

**S** is the standard deviation

**E** is the Margin of error

S=3 ,E=3

For Z:

Alpha=1-0.95=0.05

Alpha/2=0.025=2.5%

**From Cumulative Standard Distribution Table:**

Z at Alpha/2 = 1.960

**n=3.8416≅4**

**So Minimum Sample Size is 4**