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Reil [10]
3 years ago
15

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? Answer to two decimal places. Hint: this is a two-tail test.
Mathematics
1 answer:
Musya8 [376]3 years ago
6 0

Answer: I hate this app

Step-by-step explanation:

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In the interval 0 x 360 find the values of x for which cos x =0.7252
Sergeeva-Olga [200]

Answer:

x_1 = 43.5145\°

x_2 = 316.4855\°

Step-by-step explanation:

We have a positive value for the cosine of x, so we know that the value of x should be in the first quadrant (0 ≤ x ≤ 90) or in the fourth quadrant (270 ≤ x ≤ 360).

Now, let's find the value of x that gives cos(x) = 0.7252 using the inverse function of the cosine, that is, the arc cosine function.

The value of x can be calculated using:

x = arccos(0.7252)

Using this function in a calculator (you may find it as: cos^{-1}(x)), we have that:

x_1 = 43.5145\°

So this is the value of x in the first quadrant. To find the other value of x, in the fourth quadrant, that gives the same result, we just need to calculate 360° minus the value we found:

x_2 = 360\° - 43.5145\° = 316.4855\°

So the values of x are:

x_1 = 43.5145\°

x_2 = 316.4855\°

7 0
3 years ago
Here is my question ​
lara [203]

Answer:

i think its d

Step-by-step explanation:

it takes away 2 from the negative. number.....and negative 5 is still greater...sorry if its wrong

4 0
3 years ago
Rene had 83.00 in receipts and 30.51 in profit: what were her expenses?
Vedmedyk [2.9K]

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113.51

Step-by-step explanation:

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3 years ago
Why does most of eastern Russia have a low population density?
____ [38]

Answer:

The correct answer would be C. Most of the region is located within tundra and subarctic climate zones.

Hope that helped :)

4 0
3 years ago
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What is the volume of the rectangular pyramid
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Answer:

168

Step-by-step explanation:

4 0
3 years ago
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