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Snezhnost [94]
3 years ago
13

​after 5 points are subtracted from every score, the sample mean is found to be m = 24. what was the mean for the original sampl

e?
Mathematics
2 answers:
NISA [10]3 years ago
7 0

Answer:

The mean of original sample is 29.

Step-by-step explanation:

After 5 points are subtracted from every score, the sample mean is found to be m = 24

So, the mean for the original sample was = 24+5=29

Here we are talking about mean so 5 points are subtracted from every score. when we are talking in terms of mean, 5 will be added to the mean, that will give 5 added to every score.

VladimirAG [237]3 years ago
3 0
The answer is 29.........................
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A mattress store sells only king, queen and twin-size mattresses. Sales records at the store indicate that the number of queen-s
Nitella [24]

Answer:

The probability that the next mattress sold is either king or queen-size is P=0.8.

Step-by-step explanation:

We have 3 types of matress: queen size (Q), king size (K) and twin size (T).

We will treat the probability as the proportion (or relative frequency) of sales of each type of matress.

We know that the number of queen-size mattresses sold is one-fourth the number of king and twin-size mattresses combined. This can be expressed as:

P_Q=\dfrac{P_K+P_T}{4}\\\\\\4P_Q-P_K-P_T=0

We also know that three times as many king-size mattresses are sold as twin-size mattresses. We can express that as:

P_K=3P_T\\\\P_K-3P_T=0

Finally, we know that the sum of probablities has to be 1, or 100%.

P_Q+P_K+P_T=1

We can solve this by sustitution:

P_K=3P_T\\\\4P_Q=P_K+P_T=3P_T+P_T=4P_T\\\\P_Q=P_T\\\\\\P_Q+P_K+P_T=1\\\\P_T+3P_T+P_T=1\\\\5P_T=1\\\\P_T=0.2\\\\\\P_Q=P_T=0.2\\\\P_K=3P_T=3\cdot0.2=0.6

Now we know the probabilities of each of the matress types.

The probability that the next matress sold is either king or queen-size is:

P_K+P_Q=0.6+0.2=0.8

8 0
3 years ago
There are 4 pizzas which each have 12 slices. These pizzas will be divided between 15 people. How many slices does each person g
jasenka [17]
<h2><u>Anѕwєr :</u></h2>

48/15 or 3 whole 3/15

<h2><u>Explαnαtion :</u></h2>

There are 4 pizzas and each have 12 slices. So,

→ Number of slices each pizza have = 12 slices

→ Number of slices 12 pizzas have = (12 × 4) slices

→ Number of slices 12 pizzas have = 48 slices

Now, we have to find the number of slices each person get if they are split evenly.

→ Number of people = 15

Let the the number of slices each person get if they are split evenly be x. So,

→ Total number of slices = Number of people × Number of slices each gets

→ 48 = 15x

→ <u>48/15 or 3 whole 3/15 = Number of slices each gets</u>

Therefore, the number of slices each person get if they are split evenly is 48/15.

5 0
2 years ago
What two numbers that are the same equal 75
nydimaria [60]
If you mean two of the same numbers that add to make 75, it's 37.5 ....?
6 0
3 years ago
Here are the first four terms in an arithmetic sequence.
finlep [7]

Answer:

88

Step By Step

Step-by-step explanation:

An arithmetic sequence is defined as

an=a+d(n-1) where an=nth term, a=initial term, n=term number, and d=common difference

For sequence 1,4,7... a=1 and d=4-1=7-4=3 so

an=1+3(n-1)

an=3n-2, so the 30th term is

an=3(30)-2

an=88

7 0
3 years ago
Read 2 more answers
Why who is bored lol<br><br> top ten tallest buildings
solong [7]

Answer:

  1. <u>Burj Khalifa</u>: in Dubai - United Arab Emirates the height is 2,722′ to the tip
  2. <u>Shanghai Towe</u>r: in Shanghai, China the height is 2,073´
  3. <u>Makkah Clock Tower</u>: in Saudi Arabia the height is 1,972´
  4. <u>Entisar Tower</u>: in Dubai - United Arab Emirates the height is 1,870′
  5. <u>Ping An Finance Centre</u>: in Shenzhen, China the height is 1,966′ to the tip
  6. <u>Lotte Tower</u>: in Seoul, South Korea the height is 1,821′
  7. <u>One World Trade Center</u>: in New York City the height is 1,792′ to the tip
  8. <u>Tianjin Chow Tai Fook Binhai Center</u>: in Tianjin, China the height is 1,739′
  9. <u>CTF Finance Centre</u>: in Guangzhou, China the height is  1,739′
  10. <u>China Zun</u>: in Beijing, China the height is 1,731′

Hope it helps answer the question:)

7 0
3 years ago
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