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dezoksy [38]
3 years ago
8

What is a credit card balance?

Mathematics
1 answer:
MA_775_DIABLO [31]3 years ago
3 0
<span>Credit card balance is the amount of money you owe to the credit card company and it's dependent of your purchases, unpaid balnces and any other fees. If you owe money this balance is positive number. If you paid more money than you owe the balance is negative number and zero if the balance is fully paid.</span>
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g A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam. We ar
BaLLatris [955]

Answer:

The test statistic is z = 1.25

Step-by-step explanation:

We are interested in determining whether or not the proportion of the student who experience anxiety during the exam is significantly more than 80%.

At the null hypothesis, we test if the proportion is 80%, that is:

H_0: p = 0.8

At the alternate hypothesis, we test if the proportion is more than 80%, that is:

H_a: p > 0.8

The test statistic is:

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

In which X is the sample mean, \mu is the value tested at the null hypothesis, \sigma is the standard deviation and n is the size of the sample.

80% is tested at the null hypothesis:

This means that \mu = 0.8, \sigma = \sqrt{0.2*0.8} = 0.4

A random sample of 100 students was taken. Eighty-five of the student in the sample experienced anxiety during the exam.

This means that n = 100, X = \frac{85}{100} = 0.85

The test statistic is

z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}

z = \frac{0.85 - 0.8}{\frac{0.4}{\sqrt{10}}}

z = 1.25

The test statistic is z = 1.25

4 0
3 years ago
Use the frequency table to determine how many students received a score of 80 or better on an English exam.
Sveta_85 [38]
10 students scored above an 80
3 0
3 years ago
Please help! The question is on top
Sholpan [36]
Are you asking for the answer ? Or a example
5 0
3 years ago
2 ( 3 x 4) - 10 + 14/2 = 21<br><br> true or false
larisa86 [58]

Answer:

true

Step-by-step explanation:

7 0
3 years ago
A bag contains 5 white balls and 4 black balls, in how many ways 2 balls be drawn?
Elodia [21]

Answer:

4 ways (WW-BB-WB-BW)

Step-by-step explanation:

3 0
3 years ago
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