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Free_Kalibri [48]
2 years ago
12

A survey of 481 of your customers shows that 79% of them like the recent changes to the product. Is this percentage a parameter

or a statistic and why
Mathematics
1 answer:
vitfil [10]2 years ago
5 0

Answer:

Statistic, because it is a property of a sample and not the population.

Step-by-step explanation:

The difference between a parameter and an statistic is that the parameter is a property of a population distribution and an statistics is referred to a sample property.

For example, a sample mean is a statistic while a population mean is a parameter.

In t his case, the proportion is referring to the sample of 481 customers, so it is not a property of the population (altough we can use it to infere about the population), so this proportion (79%) is an statistic.

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2 years ago
For each object , choose an appropriate scale for drawing that fits on a regular sheet of paper . Not all scales on the list wil
olganol [36]

Answer:

Step-by-step explanation:

First you will have to put the formula of the rectangular rectangle L x W

Making you the answer you will do this

120 x 53 and then you divide the answer with 360 and then multiply 6 x2 and then add it and you get the answer

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2 years ago
Heidi solved the equation 3(x + 4) + 2 = 2 + 5(x – 4). Her steps are below: 3x + 12 + 2 = 2 + 5x – 20 3x + 14 = 5x – 18 14 = 2x
saveliy_v [14]

step 1: distributive property.

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3 0
2 years ago
Read 2 more answers
In general, the probability that a blood donor has Type A blood is 0.40.Consider 8 randomly chosen blood donors, what is the pro
postnew [5]

Answer:

The probability that more than half of them have Type A blood in the sample of 8 randomly chosen donors is P(X>4)=0.1738.

Step-by-step explanation:

This can be modeled as a binomial random variable with n=8 and p=0.4.

The probability that k individuals in the sample have Type A blood can be calculated as:

P(x=k) = \dbinom{n}{k} p^{k}(1-p)^{n-k}\\\\\\P(x=k) = \dbinom{8}{k} 0.4^{k} 0.6^{8-k}\\\\\\

Then, we can calculate the probability that more than 8/2=4 have Type A blood as:

P(X>4)=P(X=5)+P(X=6)+P(X=7)+P(X=8)\\\\\\P(x=5) = \dbinom{8}{5} p^{5}(1-p)^{3}=56*0.0102*0.216=0.1239\\\\\\P(x=6) = \dbinom{8}{6} p^{6}(1-p)^{2}=28*0.0041*0.36=0.0413\\\\\\P(x=7) = \dbinom{8}{7} p^{7}(1-p)^{1}=8*0.0016*0.6=0.0079\\\\\\P(x=8) = \dbinom{8}{8} p^{8}(1-p)^{0}=1*0.0007*1=0.0007\\\\\\\\P(X>4)=0.1239+0.0413+0.0079+0.0007=0.1738

3 0
2 years ago
3. Dr. Silas studies the culture of bacteria under a microscope. The function b1(t) = 1200 (1.8)^t represents the number of bact
Dominik [7]

Answer:

  (a) the initial count of bacteria

  (b) the growth factor (per hour)

  (c) the initial count in the second study

  (d) the difference in initial counts between the two studies

Step-by-step explanation:

(a) 1200 is b1(0), the initial count of bacteria.

__

(b) 1.8 is the growth factor per hour, the factor that multiplies the previous hour's count to get this hour's count.

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(c) Assuming b2(t) = 1000(1.8)^t, the value 1000 is the initial count of bacteria in the second study, b2(0).

__

(d) The difference between 1200 and 1000 means the first study started with 200 more bacteria than the second study did

3 0
2 years ago
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