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NARA [144]
3 years ago
12

A credit card company wants to test the hypothesis that its account holders spend an average of $100 per month at gasoline stati

ons. They take a sample of 1000 accounts and find an average spend of $115 with a standard deviation of $41. Conduct this hypothesis test with a .01 level of significance. What is the test statistic?
Mathematics
1 answer:
Oksi-84 [34.3K]3 years ago
6 0

Answer:

test statistics = 11.57

Step-by-step explanation:

test statics = \frac{average spend from the sample - average spend  from theory}{Standard  deviation / \sqrt{no  of samples} }

= \frac{115-100}{41/\sqrt{1000} }  = 11.57

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4x^1/2 to radical form
Lyrx [107]
x^ \frac{m}{n}= \sqrt[n]{x^m}
pemdas, so exponent first before multiply
4(x^1/2)=4x^2
this is different from
(4x)^1/2

so

x^ \frac{1}{2}= \sqrt[2]{x^1}
times that by 4
4√x
7 0
3 years ago
Read 2 more answers
Six people are standing in line for concert tickets. Their average age is 27. the average age of the first four people in line i
Vanyuwa [196]
Total age 
<span>6 * 27 </span>
<span>162 </span>

<span>Subtotal age of first 4 </span>
<span>4 * 23 </span>
<span>92 </span>

<span>Subtotal of last 3 </span>
<span>3 * 34 </span>
<span>102 </span>

<span>In the total of the first 4 and last 3 </span>
<span>the 4th person has been counted twice. </span>
<span>This second time must be subtracted. </span>

<span>Therefor </span>
<span>92 + 102 - x = 162 </span>
<span>194 - x = 162 </span>

<span>Subtract 194 from both sides </span>
<span>-x = -32 </span>

<span>Multiply both sides by -1 </span>
<span>x = 32 

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions here.
</span>
6 0
3 years ago
Do I agree or disagree
9966 [12]
You disagree because you cannot write that number as a fraction since there is no number in the ones place when it is solved and turned into a decimal.
6 0
3 years ago
Gus has a fish tank that holds 47104710 inches^3 3 of water. He is using a cylinder shaped bucket with a radius of 55 inches and
Darya [45]

Answer: 3 times.

Step-by-step explanation:

Here, The Volume of the gas tank = 4710 in^3

While, The radius of the cylindrical shaped bucket = 5 in

And, Height of the cylindrical shaped bucket = 20 in

Therefore, The volume of the bucket = \pi \times r^2\times h

= 3.14 × 5 × 5 × 20 = 1570

According to the question, cylinder shaped bucket is used to fill the tank.

Thus, The number of times the bucket will be used to fill the tank

= The Volume of the gas tank/ The volume of the bucket = 4710/1570 = 3

Therefore, The bucket will be used three times to fill the tank.


5 0
3 years ago
In a jar of coins, 18 out of the 40 coins are dimes. Express the fraction of the coins
Step2247 [10]

Answer:

Percent: 20%

Fraction: 1/5

Decimal: 0.20

Step-by-step explanation:

8:40*100 =

( 8*100):40 =

800:40 = 20%

Percent to fraction:

20%=20/100

= 0.2

=0.2×10/10

=2/10

=1/5

Percent to decimal:

20/100 = 0.20

8 0
4 years ago
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