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statuscvo [17]
3 years ago
10

A pizza delivery chain advertises that it will deliver your pizza in 30 minutes from when the order is placed. Being a skeptic,

you decide to test and see if the mean delivery time is actually more than 30 minutes. For the simple random sample of 9 customers who record the amount of time it takes for each of their pizzas to be delivered, the mean is 35.4 minutes with a standard deviation of 7.6 minutes. Assume that the population distribution is approximately normal.
Required:
a. Perform a hypothesis test using a 0.05 level of significance.
b. State the null and alternative hypotheses for the test.
Mathematics
1 answer:
svp [43]3 years ago
3 0

Answer: B

Step-by-step explanation: So that you know you are only getting the best for what YOU PAID for.

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Solve for a.<br><br> a+(−1.3)=−4.5
Debora [2.8K]
The answer to it is -3.2 or -3 1/5
7 0
3 years ago
Which of the binomials below is a factor of this trinomial 3x^2+18-21
KengaRu [80]

Answer:

A

Step-by-step explanation:

you will get 3(x-1)×(x+1) you can get the 3 and x by itself then it would be x+3

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Step-by-step explanation:

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3 years ago
two different subtraction problems that use only odd numbers for numerators and each have different of 3/4.​
Irina18 [472]

Answer:

  • 3/2 - 3/4
  • 5/3 - 11/12
  • 5/4 - 1/2
  • 7/5 - 13/20
  • 5/6 - 1/2
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  • 9/8 - 3/8
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Step-by-step explanation:

We did a systematic search for subtraction problems of this type, eliminating ones that are too trivial, such as 1/1 - 1/4 and equivalents of those with integers added, such as 3/1 - 9/4. Even so, there are an infinite number of possibilities. some of the ones involving larger numbers in the range we looked at include ...

  • 41/45 - 29/180
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  • 41/53 - 5/212

___

A reasonable approach to doing this by hand seems to be to choose a denominator for the minuend, then a denominator 4 times that value for the subtrahend. Express 3/4 using the latter denominator, and find two numbers that differ by that numerator, one of which is divisible by 4, but not by 8.

<u>Example</u>: Choose 13 as the minuend denominator. Then 52 is the subtrahend denominator, and the difference you need to create is 39/52. The smallest odd number we can add to 39 to make it divisible by 4 but not 8 is 5. So, we can use (39+5)/52 and 5/52 as our numbers that differ by 3/4. In reduced form, that subtraction is ...

  11/13 - 5/52

Note that if you choose an even denominator, then the exact procedure will vary depending on what power of 2 is a factor of the denominator.

8 0
3 years ago
Identify: Numerical expression, variable expression, Equation or Inequality? <br> 1. 6 + 3
Shkiper50 [21]
That is a numerical expression. If it was an equation, it would have an equal sign.
5 0
3 years ago
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