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oee [108]
3 years ago
6

Can someone solve this? Will mark brainliest

Mathematics
1 answer:
Gre4nikov [31]3 years ago
7 0

"X" equals 0 and "Y" also equals 0

X=0

Y=0

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Aisha wants to advertise how many chocolate chips are in each Big Chip cookie at her bakery. She randomly selects a sample of 76
lozanna [386]

Using the t-distribution, the 90% confidence interval for the number of chocolate chips per cookie for Big Chip cookies is (8.374, 9.426).

<h3>What is a t-distribution confidence interval?</h3>

The confidence interval is:

\overline{x} \pm t\frac{s}{\sqrt{n}}

In which:

  • \overline{x} is the sample mean.
  • t is the critical value.
  • n is the sample size.
  • s is the standard deviation for the sample.

The critical value, using a t-distribution calculator, for a two-tailed 90% confidence interval, with 76 - 1 = 75 df, is t = 1.9921.

The other parameters are given as follows:

\overline{x} = 8.9, s = 2.3, n = 76.

Hence the bounds of the interval are:

\overline{x} - t\frac{s}{\sqrt{n}} = 8.9 - 1.9921\frac{2.3}{\sqrt{76}} = 8.374

\overline{x} + t\frac{s}{\sqrt{n}} = 8.9 + 1.9921\frac{2.3}{\sqrt{76}} = 9.426

More can be learned about the t-distribution at brainly.com/question/16162795

#SPJ1

4 0
2 years ago
Y=15x+500 what is the answer for y?
klio [65]
Subtract 500 from 500 then it would be y=15x. Then divide 15x from 15 and the answer would be y=x
3 0
3 years ago
What is the area? Please help me I really need it!
Murrr4er [49]
The answer is 30 sq miles
6 0
3 years ago
A total of 399 tickets were sold for the school play. They were either adult tickets or student tickets. The number of students
weqwewe [10]

133 adult tickets were sold.

Step-by-step explanation:

Given,

Total tickets sold for school play = 399

Let,

x represent the number of children tickets sold.

y represent the number of adult tickets sold.

According to given statement;

x+y=399      Eqn 1

x = 2y           Eqn 2

Putting value of x from Eqn 2 in Eqn 1

2y+y=399\\3y=399

Dividing both sides by 3

\frac{3y}{3}=\frac{399}{3}\\y=133

133 adult tickets were sold.

Keywords: linear equation, substitution method

Learn more about substitution method at:

  • brainly.com/question/9231234
  • brainly.com/question/9214411

#LearnwithBrainly

4 0
4 years ago
Which property of equality would be used to solve 3x= 81?
Inga [223]

Answer:

divison

Step-by-step explanation:

3x=81

3x/3=81/3

6 0
3 years ago
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