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
Masteriza [31]
3 years ago
12

when 30 bolts are tested for hardness, their indexes have a standard deviation of 3.9. Test the claim that the standard deviatio

n of the hardness indexes for all such bolts is 6.1. use a 0.01 level of significance.
Mathematics
1 answer:
HACTEHA [7]3 years ago
5 0

Answer:

nebraskan Vulunnter na bumaril sa tatlong piliponong sundalo na siyang naging hudyat ng digmaan

Check your spelling or try different keywords

Ref A: D4EA49C383DC4782B921C6733B0FE57B Ref B: SG1EDGE0220 Ref C: 2020-12-08T02:28:46Z

PrivacyLegalAdvertise

You might be interested in
Laketown had 215 inches of snowfall last year, but only 155 inches this year. What was the percent decrease in snowfall for Lake
skelet666 [1.2K]
Okay, so FIRST you would subtract 215 - 155, which is 60, and THEN divide it by 215, so 60 divided by 215 = 0.27, and rounded that is 0.28, then you move the decimal two places to the right to make it a percentage so your answer would be A., 28%
I hope I helped! =D
8 0
3 years ago
Read 2 more answers
Newly purchased tires of a particular type are supposed to be filled to a pressure of 30 psi. Let m denote the true average pres
dimulka [17.4K]

Answer:

a) 48.21 %

b) 45.99 %

c) 20.88 %

d) 42.07 %

e) 50 %

Note: these values represent differences between z values and the mean

Step-by-step explanation:

The test to carry out is:

Null hypothesis  H₀    is                           μ₀ = 30  

The alternative hypothesis                      m  ≠ 30

In which we already have the value of z for each case therefore we look  directly the probability in z table and carefully take into account that we had been asked for differences from the mean (0.5)

a)  z = 2.1   correspond to  0.9821  but mean value is ubicated at 0.5 then we subtract    0.9821 - 0.5  and get 0.4821   or 48.21 %

b)  z = -1.75   P(m) = 0.0401     That implies the probability of m being from that point p to the end of the tail, the difference between this point and the mean so 0.5 - 0.0401 = 0.4599 or 45.99 %

c)  z = -.55    P(m) = 0.2912    and this value  for same reason as before is 0.5 - 0.2912 = 0.2088  or 20.88 %

d)  z = 1.41     P(m) = 0.9207    0.9207 -0.5     0.4207  or  42.07 %

e)  z = -5.3   P(m) = 0    meaning there is not such value in z table is too small to compute  and difference to mean value will be 0.5  

d)  z= 1.41      P(m) =

4 0
3 years ago
PLEASE HELP !!!!!!!!!
Andrej [43]

Answer: bottom one I think

Step-by-step explanation:

6 0
3 years ago
How do you put -26/3 on a number line
earnstyle [38]

U make a big number line

5 0
3 years ago
What are the solutions of the system 7x + 3y = -3 and y = -2x? (-1, 0) and (0, -1) (-8, 3) and (3, -8) (-1, 0) and (-8, 3) (0, -
Oliga [24]

Answer:

where is the #line

Step-by-step explanation:

5 0
3 years ago
Other questions:
  • What are the values of x in the equation x(x-6)=4(x+6)
    13·1 answer
  • Type the correct answer in the box. Use numerals instead of words.
    10·2 answers
  • When a number x is multiplied by 5, it gives the same result as when 48 are added to twice the number. Form an equation in terms
    5·1 answer
  • Alexa Alexa brought 32 apples for $4.16 at the rate what 1 Apple cost​
    12·1 answer
  • Whats the difference between an exponent and a base?
    6·1 answer
  • The graph shows the best-fit regression model for a set of data comparing the number of hours spent hiking and the number of mil
    11·2 answers
  • HELP ME PLEASE ILL BRAINLIEST YOU IF YOU GET IT RIGHT
    12·2 answers
  • What is the distance between points M(2,6) and N(3,1)
    8·1 answer
  • Please help me. Thank you!
    9·1 answer
  • Use the drawing tools to form the correct answers on the graph.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!