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Nostrana [21]
3 years ago
10

A bookstore carries 70 magazines. 80% of the magazines are women's magazines. How many women's magazines

Mathematics
1 answer:
adell [148]3 years ago
8 0

Answer:

56

Step-by-step explanation:

If there are 70 total magazines, and 80% are womens, then you just multiply 70 * .80 = .56

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An important factor in selling a residential property is the number of times real estate agents show a home. A sample of 23 home
yanalaym [24]

Using the t-distribution, it is found that:

a. The <u>margin of error</u> is of 4.7 homes.

b. The 98% confidence interval for the population mean is (19.3, 28.7).

The information given in the text is:

  • Sample mean of \overline{x} = 24.
  • Sample standard deviation of s = 9.
  • Sample size of n = 23.

We are given the <u>standard deviation for the sample</u>, which is why the t-distribution is used to solve this question.

The confidence interval is:

\overline{x} \pm M

The margin of error is:

M = t\frac{s}{\sqrt{n}}

Item a:

The critical value, using a t-distribution calculator, for a two-tailed <u>98% confidence interval</u>, with 23 - 1 = <u>22 df</u>, is t = 2.508.

Then, the <em>margin of error</em> is:

M = t\frac{s}{\sqrt{n}} = 2.508\frac{9}{\sqrt{23}} = 4.7

Item b:

The interval is:

\overline{x} - M = 24 - 4.7 = 19.3

\overline{x} + M = 24 + 4.7 = 28.7

The 98% confidence interval for the population mean is (19.3, 28.7).

A similar problem is given at brainly.com/question/15180581

3 0
2 years ago
How many oranges are in 7/10 and divide that by 9/11
grigory [225]

Step-by-step explanation:

I would say there are 7 oranges out of ten, ummm and

7/10 divided by 9/11

=77/90

(not really sure what your asking)

8 0
3 years ago
Simplify
kati45 [8]

Answer:

that's the simplified way 24×15×38

7 0
3 years ago
30 poins on he line hurr
Evgen [1.6K]

Answer:

(6(4) + 5) / 6 = 29/6

Step-by-step explanation:

3 0
3 years ago
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The high temperature is forecast to be 5.4 F . What is this temperature in degrees Celsius ()?
AleksAgata [21]

Answer:

-14c

Step-by-step explanation:

I’m using the actual values 1F = -17C so just times that by 5.4

7 0
3 years ago
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