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ahrayia [7]
3 years ago
14

C) A researcher has extracted two samples from the same target population, sample A and sample B. Sample A has a mean of 25 kg w

hile sample B has a mean twice that of sample A. Sample size of sample A is three times more than that of sample B. Sum of sample sizes is 60. Calculate:
i. Mean of sample B (1mark)
ii. Sample size of sample A and sample B (2 marks)
iii. Summation of x variables for sample A and sample B (4 marks)
iv. Standard deviation of sample A and sample B, consider ungrouped data (5 marks)
Mathematics
1 answer:
aleksandrvk [35]3 years ago
3 0

Answer:

dsgberhyujxgkloyjnhbgfvbhnjklkjhbgfdfghjkiopolkjhgfew

Step-by-step explanation:

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You are making a welding fixture and must cut down a length of copper tubbing from 15 1/8 inches to 8 3/4 inches. If the leftove
fgiga [73]

Answer: 51/8 inches

Step-by-step explanation:

Since you must cut down the length of copper tubbing from 15 1/8 inches to 8 3/4 inches, the leftover piece will be:

15 1/8 - 8 3/4

Change the mixed fraction to improper fraction.

121/8 - 35/4

The LCM will be 8

( 121 - 70 )/8

51/8 or 6.375 inches

Therefore, the leftover piece will be 51/8 inches long

7 0
3 years ago
5. LETTERS How many ways can you<br> arrange the letters in the word<br> history?
SIZIF [17.4K]

Answer:

5040

Step-by-step explanation:

You get this number by using the mathematical process of factorials.

Since <em>history </em>has seven words, we will solve seven factorial.

7! = 5040

3 0
3 years ago
Read 2 more answers
An online DVD rental company offers gift certificates that you can use to purchase rental plans. You have a gift certificate for
Luden [163]

Answer:

6 months you can purchase with the gift certificate.

Step-by-step explanation:

Given

You have a gift certificate for $30.

Step 1 of 1

The plan you select costs $5 per month.

$5 \times m=30$

$\frac{5}{5}  \times m=\frac{30}{5} $

m=6

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7 0
2 years ago
The San Andreas fault separates the pacific plates from the North America plate. The pacific plate moved northward relative to t
lesantik [10]

Answer:

The time, t it will take LA and San Francisco to be next to each other is 8,245,614.04 years which is over 8 million years

Step-by-step explanation:

The given parameters are;

The speed with which the pacific plate moved northward relative to the North American plate = 5.7 cm/year = 5.7 × 10⁻⁵ km/year

The distance between current LA and San Francisco = 470 km

From the formula for speed, s, we have

Speed = Distance/Time

Therefore, Time, t = Distance/Speed

The time, t it will take LA and San Francisco to be next to each other is given as follows;

t = (Distance between LA and San Francisco)/(The speed with which the pacific plate)

t = (470 km)/(5.7 cm/year) = 470/(5.7 × 10⁽⁻⁵⁾) = 8245614.04 years

Therefore, the time, t it will take LA and San Francisco to be next to each other is 8245614.04 years.

6 0
3 years ago
The graph above shows the cost of a large pizza
madreJ [45]
I would say the first choose that the vertical axis should use $0.50 intervals instead of $1.
Because this would make it much easier to read and understand and would it would also be more accurate.
5 0
3 years ago
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