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Simora [160]
2 years ago
9

A sample of ????=25 diners at a local restaurant had a mean lunch bill of $16 with a standard deviation of ????=$4 . We obtain a

95% confidence interval as (14.43,17.57) . Which action will not reduce the margin of error?
Mathematics
1 answer:
zaharov [31]2 years ago
6 0

Answer:

"Decreasing the sample size."

Step-by-step explanation:

The margin of error is :

ME=z\times \frac{\sigma }{\sqrt{n}}

Therefore, as n decreases, margin of error increases.

In the question we are asked " Which action will not reduce the margin of error."

Therefore, the correct option for which action will not reduce the margin of error is "Decreasing the sample size."

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Can someone help me?
svlad2 [7]

Answer:

Use Pythagorean theorem,

Hypotenuse² = base² + altitude²

= 3²+ 6²

= 9 + 36

x² = 45

x = √45

x = 6.71

Step-by-step explanation:

7 0
2 years ago
A student bought 3 shirts at $12.25 each and 2 pairs of pants at $25.50 each. How much money
4vir4ik [10]

Answer: 87.75

Step-by-step explanation:

Multiply 12.25 times 3 because the student bought 3 shirts

Then multiply 25.50 times 2 because the student bought two pairs of pants

Then add up both your multiplication together and you will get 87.75

3 0
3 years ago
Need help with 27 , 29, and 30. ASAP please this is due in 30 minutes
salantis [7]
Hope this helps with the answer to your question:) (sorry I didn't know how to do question 30)

6 0
2 years ago
Find the Area of the Shaded Region.
agasfer [191]

Answer:

I think it should be 32

Step-by-step explanation:

11 x 7= 77

9 x 5=45

77-45=32

3 0
2 years ago
1. Determine whether or not each of the following is a Binomial random variable. If it is not a Binomial random variable, provid
satela [25.4K]

Answer:

a) You roll a die 25 times. Let X be the number of times that you roll "3".

* Is a Binomial

b) The SJSU football team will play 12 games next season. They have a 70% chance of winning each conference game and a 60% chance of winning each nonconference game. Let X be the number of games the SJSU football team wins next season.

* Not a Binomial because probability of success is not constant

c) Evelyn has a 75% chance of getting an A in each class she takes. Let X be the number of times Evelyn earns an A during four years at SJSU.

* Is a Binomial

8 0
3 years ago
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