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aniked [119]
3 years ago
5

One of your classmates is working on an assignment for her statistics class. She created an online survey to collect student opi

nions about the college class schedule. She only has time before her engineering class to distribute the link to the survey. So she stands outside the engineering building just before class each day and randomly selects students as they enter the building. She hands each selected student a link to the survey and asks the student to go online and answer the questions. Over several months, she repeats the process until 200 students go online and take the survey.Which of the following statements accurately describes your classmate’s survey? Check all that apply.1.The sample is not representative of the population.2.The sample is biased.3.The sample is large, so the results of the survey will be reliable.4.The survey can be used to draw conclusions about the population.
Mathematics
1 answer:
raketka [301]3 years ago
6 0

Answer:

...... idk

Step-by-step explanation:

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Addy bought a new shirt and she had a 20% off coupon . The coupon took $8.25 off of the price of her shirt. What did she pay wit
zloy xaker [14]

Answer:

$33

Step-by-step explanation:

Given: Addy had 20% off coupon.

           The coupon took $8.25 off of the shirt price.

Lets assume the original cost of shirt be "x".

We know Addy had 20% off coupon, which help to reduce the price of shirt by $8.25.

∴ We can form an equation to know the original price of shirt.

⇒\frac{20}{100} \times x= \$ 8.25

⇒\frac{1}{5} \times x= \$ 8.25

Multiplying both side by 5

⇒x= 8.25\times 5

∴ x= \$ 41.25

Hence, The original cost price of shirt was $41.25.

Next, finding the price paid by Addy for her new shirt by reducing coupon discount from the cost of shirt.

Price paid by Addy for her new shirt= \$ 41.25- \$ 8.25= \$ 33

Hence, Addy paid $33 for her new shirt.

8 0
3 years ago
Ginny is studying a population of frogs. She determines that the population is decreasing at an average rate of 3% per year. Whe
Gala2k [10]

Answer:

f(x) = 1,200 * (0.97)ˣ

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Write is the formula for the discriminant?
Svetlanka [38]

Answer:

The number D = b2 – 4ac determined from the coefficients of the equation ax2 + bx + c = 0. The discriminant reveals what type of roots the equation has. Note: b2 – 4ac comes from the quadratic formula.

Hope this helps please mark me as brainliest

5 0
3 years ago
Read 2 more answers
A company that produces computers recently tested the battery in its latest laptop in six separate trials. The battery lasted 8.
Anna35 [415]

confidence interval for the mean battery life in the new model is [7.9489, 8.3045].

What is confidence interval ?

A confidence interval, in statistics, refers to the chance that a population parameter can fall between a collection of values for an exact proportion of times.

Main body:

Formula for confidence interval is =

CI = x- bar ± z*s/√n            where,

CI = confidence interval

x- bar = sample mean

z = confidence level value

{s} = sample standard deviation

{n} = sample size  

given ;

n = 6

mean = (8.23+7.89+8.14+8.25+8.30+ 7.95)/6

         =  8.127

value of z for 95% C.I. = 1.96

C.I. = 8.127 ± 1.96 * 0.22/√6

C.I. = 8.127 ± 0.1781

C.I. =[7.9490, 8.3044]

Hence correct option is A.

To know more about confidence interval , visit:;

brainly.com/question/15712887

#SPJ4

         

8 0
11 months ago
What is a equivalent fraction and decimal to 3 ones and 7 hundreths
nasty-shy [4]
3 ones = 3
7 hundredths = 7/100

So equivalent fraction is 3 7/100 or 307/100.
Equivalent decimal is: 3.07
4 0
3 years ago
Read 2 more answers
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