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quester [9]
3 years ago
13

A publisher reports that 44% of their readers own a personal computer. A marketing executive wants to test the claim that the pe

rcentage is actually different from the reported percentage. A random sample of 350 found that 40% of the readers owned a personal computer. Determine the P-value of the test statistic. Round your answer to four decimal places.
Mathematics
1 answer:
UNO [17]3 years ago
6 0

Answer:

P (z) = -1.5094

Step-by-step explanation:

We have to find P-value (that means we have to calculate the test value to evaluate a proportional hypothesis

From problem statement

P₀ = 0,44          44 %  from publisher report

The claim :

350 = n       random sample

P = 0,40            40 %

To calculate  P value

P ( z )  = ( P - P₀ ) / √(P₀*Q₀)/n

then     P ( z ) = - 0.04 / √(0,44)(0,56)/350   P(z) = - 0.04/0,02

P (z) = -1.5094

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Reverse the two digits of my age, divide by three, add 20, and the result is my age. How many years old am I
lapo4ka [179]

Answer:

  • 48 years old.

Step-by-step explanation:

Let the age be xy or 10x + y.

Reverse the two digits of my age, divide by three, add 20, and the result is my age, convert this to equation:

  • (10y + x)/3 + 20 = 10x + y
  • (10y + x)/3 = 10x + y - 20
  • 10y + x = 3(10x + y - 20)
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  • 30x - x + 3y - 10y = 60
  • 29x - 7y = 60

We should consider both x and y are between 1 and 9 since both the age and its reverse are 2-digit numbers.

Possible options for x are:

  • 29x ≥ 7*1 + 60 = 67 ⇒ x > 2, at minimum value of y,

and

  • 29x ≤ 7*9 + 60 = 123 ⇒ x < 5, at maximum value of y.

So x can be 3 or 4.

<h3>If x = 3</h3>

  • 29*3 - 7y = 60
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  • 7y = 27
  • y = 27/7, discarded as fraction.

<h3>If x = 4</h3>

  • 29*4 - 7y = 60
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So the age is 48.

6 0
1 year ago
HELP PLEASE 10 POINTS
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Answer:

A

Step-by-step explanation:

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Marge cuts 16 pieces of tape. each piece is 3/8 inches long. how much tape did she use
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3 years ago
Read 2 more answers
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