Solve the system by substitution. 7x-3y=-25 4x+5=y Simplify ( , )

Two chemists working for a chicken fast-food company, have been producing a very popular sauce. Let’s call then Jesse and Mr. Wh

a_sh-v [17]

Answer:

Check the explanation

Step-by-step explanation:

Let $\overline{x}$ and $\overline{y}$ be sample means of white and Jesse denotes are two random variables.

Given that both samples are having normally distributed.

Assume $\overline{x}$ having with mean $\mu_{1}$ and $\overline{y}$ having mean $\mu_{2}$

Also we have given the variance is constant

A)

We can test hypothesis as

$H0: \mu_{1} = \mu_{2}H1: \mu_{1} > \mu_{2}$

For this problem

Test statistic is

$T=\frac{\overline {x}-\overline {y}}{s\sqrt{\frac {1}{n1} +\frac{1}{n2}}}$

Where

$s=\sqrt{\frac{(n1-1)*s1^{2}+(n2-1)*s2^{2}}{n1+n2-2}}$

We have given all information for samples

By calculations we get

s=2.41

T=2.52

Here test statistic is having t-distribution with df=(10+7-2)=15

So p-value is P(t15>2.52)=0.012

Here significance level is 0.05

Since p-value is <0.05 we are rejecting null hypothesis at 95% confidence.

We can conclude that White has significant higher mean than Jesse. This claim we can made at 95% confidence.

3 0

3 years ago

How would you solve this problem? ((2x^12y^3)/(x^10y))^-5

Hatshy [7]

There is no equals sign. Are we looking for x, or y?

Either way, with the -5 exponent outside the parentheses, you can multiply that to each exponent in the fraction to get rid of it.

I'm not sure what you mean by 2x^12y^3. Is it an exponent within another exponent?

7 0

4 years ago

a living room wall is 13 feet long. How far from the corner would you hace to the edge of a 3ft 8in shelf for it to be centered

Sunny_sXe [5.5K]

It would be centered togethered.

8 0

4 years ago

I’m doing operations and interfers Need the answer have a test tmr

arsen [322]

Answer:

all work for both worksheets are pictured and shown

Step-by-step explanation:

worksheet 2

28. 968/22=44

29. 27+8=35

30. 39×37=-1443

5 0

3 years ago

sarah works at a clothing store. Her weekly salary is $250 plus%4 commision on her sales.Last week she sold $ 2,500 worth of clo

creativ13 [48]

Answer:

80,000

Step-by-step explanation:

I hope this helps:)

3 0

3 years ago