1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
sladkih [1.3K]
3 years ago
13

A sample of 1500 computer chips revealed that 37% of the chips fail in the first 1000 hours of their use. The company's promotio

nal literature states that 39% of the chips fail in the first 1000 hours of their use. The quality control manager wants to test the claim that the actual percentage that fail is different from the stated percentage. Find the value of the test statistic. Round your answer to two decimal places.
Mathematics
1 answer:
andreyandreev [35.5K]3 years ago
3 0

Answer:

z=\frac{0.37 -0.39}{\sqrt{\frac{0.39(1-0.39)}{1500}}}=-1.59  

Step-by-step explanation:

Data given and notation

n=1500 represent the random sample taken

\hat p=0.37 estimated proportion of of chips fail in the first 100 hours

p_o=0.39 is the value that we want to test

\alpha represent the significance level

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that  the actual percentage that fail is different from the stated percentage. Find the value of the test statistic.:  

Null hypothesis:p=0.39  

Alternative hypothesis:p \neq 0.39  

When we conduct a proportion test we need to use the z statisitc, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.37 -0.39}{\sqrt{\frac{0.39(1-0.39)}{1500}}}=-1.59  

You might be interested in
Find the value of X
emmasim [6.3K]

Answer: 20 i think srry if its wrong

Step-by-step explanation:

7 0
2 years ago
Read 2 more answers
Write 1 and 1/5 and 1 and 1/3 using a common denominator :)
RUDIKE [14]

Answer:

1 3/15

1 5/15

Step-by-step explanation:

6 0
2 years ago
K-8=-17 that is the answer to this problem
Margarita [4]

Answer:

k=-9

Step-by-step explanation:

k-8+8=-17+8

k=-9

6 0
2 years ago
Read 2 more answers
Find the volume of the cone that sits on top of the cylinder
puteri [66]

Answer:

Vc = (π/3)✓17 ≈ 4.12 ft³

Step-by-step explanation:

h = ✓(4²+1²)

h = ✓17

V = πr²h/3

V = π(1)²✓17/3

V = (π/3)✓17 ≈ 4.12

8 0
2 years ago
Cameron bought a packet of 45 bars of chocolate.He ate one fifth of them on Tuesday.He ate a twelfth of the remaining bars on We
Vlad1618 [11]
He bought 45 bars of chocolate.

1/5 x 45 = 9 
He ate 9 bars on Tuesday.

45 - 9 = 36
He had 36 bars left.

1/12 x 36 = 3
He ate 3 bars on Wednesday

36 - 3 = 33
He had 33 bars left.

------------------------------------------------
Answer: He had 33 bars left.
------------------------------------------------
6 0
3 years ago
Read 2 more answers
Other questions:
  • what is the area of a circle with a diameter of 4.2 centimeters? us 3.14 for pi. round your answer to the nearest tenth.
    7·1 answer
  • Does there exist a relation that is not a function
    12·1 answer
  • Rectangle is 2/5 in. long and 1/3 in. wide.
    5·1 answer
  • Hi can someone plz help me with this question
    15·1 answer
  • What is 3 to the power of 4 simpifyed
    10·2 answers
  • Mrs. Green bought a cake mix with instructions to bake at 190 Celsius. Her American- made oven has only a Fahrenheit scale. At w
    9·1 answer
  • In her last four games of golf, Maria has had scores of 76, 73, 70, and 67.
    7·1 answer
  • Marianne has been collecting donations for her biscuit stall at the school summer fayre. There are some luxury gift tins of bisc
    15·1 answer
  • Prove or disprove the figure defined by points A, B, C, d is a rhombus
    11·1 answer
  • Consider these signed numbers and determine whether each product is positive or negative.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!