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sattari [20]
2 years ago
13

A manager of the credit department for an oil company would like to determine whether the mean monthly balance of credit card ho

lders is equal to $75. An auditor selects a random sample of 100 accounts and finds that the mean owed is $83.40 with a sample standard deviation of $23.65. If you were to conduct a test to determine whether the auditor should conclude that there is evidence that the mean balance is different from $75, which test would you use? a) Z-test of a population mean b) Z-test of a population proportion c) t-test of population mean d) t-test of a population proportion
Mathematics
1 answer:
valkas [14]2 years ago
6 0

Answer:

c) t-test of population mean

Explanation:

The t-test statistic is used in hypothesis testing. Here we would use a one sample t test to test our hypothesis. The one sample t test measures the statistical difference between the hypothesized mean and the sample mean. In a one sample t test or single sample t test, a test variable is measured against a test value.

Example we compare our test variable to the hypothesized mean value $75 above.

The t test is used instead of z score when standard deviation is unknown.

Using the t test, we either accept or reject the null hypothesis given alternative hypothesis.

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Answer:

6296.5

Step-by-step explanation:

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622+5674.5=6296.5

8 0
2 years ago
The sum of the lengths of any two sides of a triangle must be greater than the third side. If a triangle has one side that is 8 
julsineya [31]
Good afternoon, 

First side= 8cm 
Third side= x
Second side= 2x-4

We know that the sume of the lenghts of any two sides must be greater than the third side, so:

Second \,\,\,\,side+Third\,\,\,\,side>First\,\,\,\,side \\ 2x-4 + x >8 \\ 3x>12 \\ x>4


<span>Answer: Third side= x                        ;         where: x>4 or (4,+infinity)
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3 0
2 years ago
Q 18: Melissa uses 150 g of sugar for every 6 eggs. How many eggs should she use with 350 g of
Zarrin [17]

Answer:

14 eggs

Step-by-step explanation:

150 grams need 6 eggs

1 gram need 6 ÷ 150 eggs

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8 0
2 years ago
Julie works Sunday, monday, and Wednesday 10 hrs. each day. on Tuesday andThursday and Friday are 7 hours each day. She's off on
Oliga [24]
(Sunday, Monday, Wednesday) 3X10=30 hours

(Tuesday, Thursday, Friday) 3X7= 21 hours

30 hours + 21 hours = 51 Hours.

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8 0
3 years ago
There are 10 fish tanks at a pet store. The data shows the number of fish in each tank. 30,32,41,38,42,30,35,38,40,45. Create a
TiliK225 [7]

Answer:

Find the attached

Step-by-step explanation:

A histogram is simply a graphical visualization of the distribution of a particular variable or data set. Besides, a histogram accurately represents the distribution of numerical data and estimates of the probability distribution of a a given continuous variable.

There exist a number of software which can easily compute a histogram associated with a particular data. One of the most commonly used software for this purpose is Stat-Crunch software.

To generate a histogram in stat-crunch follow these steps;

Enter the data in any column of stat-crunch

Click on Graph followed by Histogram

Select the column that contains your data

Click compute

Stat-Crunch generates the histogram as shown in the attachment below.

4 0
3 years ago
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