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tatiyna
2 years ago
13

a cell phone user wants to determine what data plan she should get on her new contract. she selects a random sample of 15 months

and finds her average usage to be 11.25 gb with a standard deviation of 2.5 gb. she wants to test h0: µ ≥ 12 gb versus ha: µ < 12 gb. what is the p-value for this test? (round your answer to 3 decimal places.)
Mathematics
1 answer:
ArbitrLikvidat [17]2 years ago
3 0

The p value of the test when the cell phone user wants to determine what data plan she should get is 0.1324.

<h3>What is a P value?</h3>

The p-value is a figure that, when generated from a statistical test, indicates how likely it is that, if the null hypothesis were true, you would have discovered a certain collection of observations. In order to determine whether to reject the null hypothesis, P-values are utilized in hypothesis testing.

The following can be deduced from the information:

Number = 15

Mean = 11.25

Standard deviation = 2.5

Test statistics = -1.162

This is the left tailed test.

The p value will be:

P(z < -1.162 )

This will be looked at in the distribution table

= 0.1324

P-value = 0.1324

Learn more about p value on:

brainly.com/question/4621112

#SPJ1

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What algebraic expression must be subtracted from the sum of y2+5y−1
ss7ja [257]

Answer:

2y² -4y +5

Step-by-step explanation:

First you need to find the sum of y²+5y-1 and 3y²-2y+4

(y²+5y-1) + (3y²-2y+4) => y²+3y²+5y-2y-1+4

                                  =4y²+3y+3

Next is to subtract 2y²+7y-2 from the sum calculated above in order to  find the algebraic expression asked in the exercise

4y²+3y+3 -(2y²+7y-2) => 4y²-2y²+3y-7y+3+2

                                   =2y² -4y +5

Therefore, the algebraic expression asked must be 2y² -4y +5

7 0
3 years ago
Find the volume of the rectangular prism. Express your answer as a simplified mixed number.
OverLord2011 [107]

Answer:

Volume = = 138⁶/32 cubic meters

Step-by-step explanation:

Given:

Length = 8⅜ m

Width = 2 m

Height = 8¼ m

Required:

Volume as a mixed number

Solution:

Volume of rectangular prism = L*W*H

Plug in the values

V = 8⅜ × 2 × 8¼

Change to improper fraction

V = 67/8 × 2 × 33/4

= (67 × 2 × 33)/(8 × 4)

= 4,422/32

= 138⁶/32 m³

7 0
3 years ago
1. Julia is selling jewelry at the Hazel Park Memorial Festival, She sells earrings for $5
inna [77]

Answer:

Step-by-step explanation:

e = earrings and b = bracelets

so each earring cost 5 bucks.....5e

and each bracelet cost 7 bucks.....7b

and she hopes to make $ 300...

so ur equation is : 5e + 7b = 300 <===

5 0
3 years ago
What is the length of CD in this diagram, ABC - EDC,
natima [27]

Answer:

<h2>4</h2>

Option A is the right option.

solution,

∆ABC~∆EDC

\frac{bc}{cd}  =  \frac{ac}{ec}  \\  \:

putting the values,

\frac{20 - x}{x}  =  \frac{20}{5}  \\  or \: 5(20 - x) = 20x(cross \: multiplication) \\ or \: 100 - 5x = 20x \\ or \:  - 5x - 20x =  - 100 \\ or \:  \:  - 25x =  - 100 \\  \: or \: x =  \frac{ - 100}{ - 25}  \\ x = 4

Hope this helps..

Good luck on your assignment..

8 0
3 years ago
Read 2 more answers
Describe at least two similarities between constructing a perpendicular line through a point on a line and constructing a perpen
Vitek1552 [10]

The similarities between constructing a perpendicular line through a point on a line and constructing a perpendicular through a point off a line include:

  • Both methods involve making a 90-degree angle between two lines.
  • The methods determine a point equidistant from two equidistant points on the line.

<h3>What are perpendicular lines?</h3>

Perpendicular lines are defined as two lines that meet or intersect each other at right angles.

In this case, both methods involve making a 90-degree angle between two lines and the methods determine a point equidistant from two equidistant points on the line.

Learn more about perpendicular lines on:

brainly.com/question/7098341

#SPJ1

3 0
2 years ago
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