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LuckyWell [14K]
1 year ago
14

The sampling distribution of certain statistical measures shows a normal distribution which of the following is an unbiased esti

mator that has a graph that is normally distributed and is not skewed
a. proportion
b. median
c. range
d. variance
Mathematics
2 answers:
PilotLPTM [1.2K]1 year ago
7 0

GACA

Answer: 1. B) Normal distribution

2. D) Variance, mean, proportion

3. D) normal distribution

4. D) normal distribution

5. A) proportion

6. A) median

7. C) this is just one sample. The sampling distribution of the mean requires repeating this process with the same sample several times

8. A) not a normal distribution

9. B) mean, variance, proportion

10. A) the sampling distribution of the variance requires repeating this process with the same sample several times. So this does not compare to the sampling distribution of the variance

Step-by-step explanation: 100% :)

svlad2 [7]1 year ago
4 0

Answer:

A) Proportion.

Step-by-step explanation:

The distribution of sample proportions leads or may tends to approximate a normal distribution and is an unbiased estimator that has a graph that is usually distributed and is not skewed. In other words, simply, we can also say that the population proportion is basically defined to be as the mean of the sample proportion. The population proportion is basically equaled the expected value of the sample proportion.

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Answer:

Step-by-step explanation:

Given that the  mean incubation time for a type of fertilized egg kept at a certain temperature is 25 days.

Let X be the incubation time for a type of fertilized egg kept at a certain temperature is 25 days.

X is N(25, 1)

a) Normal curve is in the attached file

b) the probability that a randomly selected fertilized egg hatches in less than 23 days

=P(X

we convert x into Z score and use std normal distn table to find probability

P(X

i.e. we can say only 2.5% proportion will hatch in less than 23 days.

8 0
1 year ago
Jenna was selling muffins and bagels in the lobby to support the math club. Bagels sold for $0.75 and muffins sold for
trapecia [35]
I believe it’s c but yeah
5 0
1 year ago
The average price for gasoline per gallon is $3.562 if last year the average price for gasoline per gallon was $2.810 what is th
Greeley [361]

Answer: It increased by 78.89%

Step-by-step explanation:

2.810 / 3.562

=0.7889

78.89%

4 0
2 years ago
What are the solutions to the quadratic equation (5y + 6)2 = 24? y = StartFraction negative 6 + 2 StartRoot 6 EndRoot Over 5 End
Paladinen [302]

Answer:

there are two solutions:

a) y=\frac{-6+2\sqrt{6} }{5}, and

b) y=\frac{-6-2\sqrt{6} }{5}

Step-by-step explanation:

In the equation: (5y+6)^2=24, since a perfect square with the unknown "y" is isolated on the left of the equal sign, we start by applying the square root on both sides of the equality, and then on isolating the unknown:

(5y+6)^2=24\\\sqrt{(5y+6)^2} =+/-\sqrt{24} \\(5y+6)=+/-\sqrt{6*4} \\(5y+6)=+/-2\sqrt{6}\\5y=-6+/-2\sqrt{6}\\y=\frac{-6+/-2\sqrt{6} }{5}

Therefore there are two solutions:

a) y=\frac{-6+2\sqrt{6} }{5}, and

b) y=\frac{-6-2\sqrt{6} }{5}

10 0
1 year ago
Read 2 more answers
A truck travels 500 miles at an average speed of 60 miles per hour on a return trip on the same route and travels at an average
marta [7]

The return trip took 1 hour 42 minutes longer

Further explanation:

The distance will remain same on return.

The formula for speed is given by:

Speed=\frac{Distance}{Time}

Let d be the distance

s1 be the speed while going and s2 be the speed while returning

and

t1 be the time while going and t2 be the time while returning

d=500 miles

s1=60 miles per hour

s2=50 miles per hour

We have to calculate time for both trips,

So,

<u>Time while Going:</u>

<u>s_1=\frac{d}{t_1}\\t_1=\frac{d}{s_1}</u>

<u>Putting the values of d and s1</u>

<u>t_1=\frac{500}{60}\\=8.3\ hours</u>

<u>Converting 8.3</u>

8 will be the hours,

for 0.3 hour

0.3*60=18 minutes

The first trip took 8 hours and 18 minutes.

<u>Time while returning:</u>

s_2=\frac{d}{t_2}\\t_2=\frac{d}{s_2}

Putting the values of d and s1

t_2=\frac{500}{50}\\=10\ hours

The difference of both times is: 1 hour 42 minutes

So,

The return trip took 1 hour 42 minutes longer

Keywords: Time, Distance, Speed

Learn more about movement at:

  • brainly.com/question/2367554
  • brainly.com/question/2670657

#LearnwithBrainly

8 0
1 year ago
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