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Nataly_w [17]
3 years ago
14

Find the value of zα/2 to construct a confidence interval with level 95%. Round the answer to two decimal places.

Mathematics
1 answer:
Orlov [11]3 years ago
3 0

Answer:

The value is   Z_{\frac{\alpha }{2} } =  1.96

Step-by-step explanation:

From the question we are told the confidence level is  95% , hence the level of significance is    

      \alpha = (100 - 95 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.96

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Fed [463]

Answer:

$32.07

Step-by-step explanation:

I am not sure - are we seeing the full information about this problem ?

because the problem description is strangely vague and confusing, as it uses "total cost" two times for not the same thing ...

either total cost means including tax or not including tax. but it cannot mean both ...

I think the most likely understanding of this problem is that the first price is without tax, and now we need to calculate and add the extra 6% tax to get the really total price to be paid.

I will solve this now based on this assumption.

100% = $30.25

1% = 100%/100 = 30.25/100 = $0.3025

6% = 6×1% = 6×0.3025 = $1.815 ≈ $1.82

the total price is then calculated either by

100% + 6%

or by

106% = 100%×1.06 = 30.25×1.06 = $32.065 ≈ $32.07

in both cases we get the same result, of course.

4 0
3 years ago
BRAINLIESTTT ASAP! PLEASE HELP ME :)
KonstantinChe [14]

Answer: 5.18 pound per square inch

Step-by-step explanation:

According to pressure law, the pressure of a gas is directly proportional to the temperature

P1/T1 = P2/T2

where P1 is the initial pressure = 6 pounds

T1 is the initial to temperatures = 440°F

P2 is the final pressure = Z

T2 is the final temperature = 380°F

Thus, let final pressure be Z

P1/T1 = P2/T2

6/440 = Z/380

0.0136 = Z/380

Make Z the subject formula

Z = 380 x 0.0136

Z = 5.18 pound per square inch

Thus, the final pressure at 380°F is 5.18 psi (pound per square inch)

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4 years ago
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Jada has saved 60% of $60.  This is a percent of number question.

First we need to know 60% of $60

Change the percent to a decimal and multiply.

.60(60) =$36 saved so far.

8 0
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Natasha2012 [34]

Answer:

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Step-by-step explanation:

Hope this helps!

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3 years ago
Which of the following is an equivalent form for 2x=log3(y-1)
skad [1K]

Answer:

B

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