Suppose that a recent article stated that the mean time spent in jail by a first-time convicted burglar is 2.5 years. A study was then done to see if the mean time has increased in the new century. A random sample of 27 first-time convicted burglars in a recent year was picked. The mean length of time in jail from the survey was four years with a standard deviation of 1.9 years. Suppose that it is somehow known that the population standard deviation is 1.4. Conduct a hypothesis test to determine if the mean length of jail time has increased. Assume the distribution of the jail times is approximately normal.

Answers

Answer 1

Answer:

sigma should be used

Step-by-step explanation:

Given that The mean length of time in jail from the survey was four years with a standard deviation of 1.9 years.

The above given is for sample of 27 size.

For hypothesis test to compare mean of sample with population we can use either population std dev or sample std dev.

But once population std deviation is given, we use only that as that would be more reliable.

So here we can use population std deviation 1.4 only.

If population std deviation is used we can use normality and do Z test

Hope this helps ;)


Related Questions

Given: In Triangle ABC, DB congruent FC, FG⊥BC, DE⊥BC, and AB congruent AC. Prove: DE congruent FG.

Answers

For statements you would put the theorem or other thing that justifies that gg is congruent to de. You should have a list

hi to u famous girl !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

YEET

Step-by-step explanation:

Answer:kuktf

Step-by-step explanation:

oh;f' 'h

'd5r6sxfh;jhp

Michelle has fifteen more than two times as many pieces of candy as her sister. Which expression represents the number of pieces of candy that Michelle has if the variable c represents the number of pieces of candy that her sister has?

Answers

Fifteen more means somewhere we’ll add 15. Two times as many as c = 2c. So,

2c + 15 = how much candy Michelle has
2c + 15 is the answer

Answer:

b

Step-by-step explanation:

pleaseee helpppppppp

Answers

If I remember correctly, you have to divide each coordinate point by 1/2.

11 more than x is less than. 3 (please)

Answers

Answer:

(11+x)-3

Step-by-step explanation:

11 more than x is another way of saying 11+x

And "less than 3" means subtracting 3 from the terms

So if you put that together it would be

(11+x) -3

Help ASAP! I’m confused! Thanks!!

Answers

Answer:

Angles 2 and 4 are congruent

convert 4307 rads / 1 second into inches/sec

Answers

Answer:1 inch per minute in/min = 0.017 inches per second in/sec

Step-by-step explanation:

What is Steve's mean speed if he bikes 55.5 miles in 3.7 hours? Round your answer to two decimal places, if necessary.

Answers

Answer:

15m/s

Step-by-step explanation:

Given data

DIstance= 55.5 miles

time= 3.7 hours

Required

the speed

We know that

Speed= distance/time

Substitute

Speed= 55.5/3.7

Speed= 15 m/s

Hence the speed is 15m/s

On a large college campus, the students are able to get free copies of the school newspaper,the local newspaper, and a national paper. Ninety percent of the students read at least one of thepapers, 40% read only the school newspaper, 20% read only the local paper, 5% read only thenational paper, and 2% read all three papers. Fifty percent read the school newspaper, and 5%read the school and national newspapers. A randomly selected student is asked whether he orshe reads the school, local, or national paper. Express each of the following events in setnotation and find the percentage of students represented by each.a The student does not read any paper.b. The student reads the local paper.c. The student reads exactly two papers.d. The student reads at least two papers.

Answers

Answer:

a) The percentage that the student does not read any paper is  10%  

b) The percentage that the student reads the local paper is 40%

c) the percentage that the student reads exactly two papers is 23%

d) the percentage that the student reads at least two papers is 25%

Step-by-step explanation:

Given the data in the question;

as illustrated in the Venn diagram below,

a)The student does not read any paper;

The percentage that the student does not read any paper will be;

100% - 90% = 10%

Therefore, The percentage that the student does not read any paper is  10%  

 

b) The percentage that the student reads the local paper;

from the Venn diagram below;

⇒ ( 20 + 15 + 3 + 2 )%    

= 40%

Therefore, The percentage that the student reads the local paper is 40%

c) The percentage that the student reads exactly two papers

⇒ ( 15 + 5 + 3 )%

= 23%

Therefore, the percentage that the student reads exactly two papers is 23%

d) The percentage that the student reads at least two papers;

⇒( 15 + 5 + 3 + 2 )%      

= 25%

Therefore, the percentage that the student reads at least two papers is 25%

PLEASE ANSWER ASASP FOR BRAINLEST!!!!!!!!!!!!!!

Answers

Answer: 10

Step-by-step explanation:

2+4+4= 10

1 2/3 +(-2/5) as a fraction

Answers

As a fraction it is 1 4/15
In decimal it is 1.266 repeat

x^2 – 2x – 54 = 0

I need it in completing the square form

Answers

Completing the Square:

x^2 - 2x = 54

x^2 - 2x + 1 = 54 + 1

(x-1)^2 = 55

x - 1 = ±[tex]\sqrt{55\\}[/tex]

x = 1 ± [tex]\sqrt{55}[/tex]

what is 3/4 of 9 1/4

Answers

Answer:

Im pretty sure that its 3/37

Step-by-step explanation:

3

4

÷  

37

4

=  

3

4

×  

4

37

=  

3 × 4

4 × 37

=  

12

148

=  

12 ÷ 4

148 ÷ 4

=  

3

37

sorry if its wrong

pleaseee anwser quick!!! 10 points!

Answers

Answer:

I think quadratic

Step-by-step explanation:

Quadratic I hope it’s right

The legs of the drafting table form vertical angles. Find the measures of ∠1, ∠2 and ∠3.

Answers

Answer:

m∡1 = 95°

m∡2 = 85°

m∡3 = 95°

Step-by-step explanation:

m∡1 + 85 = 180;   m∡1 = 95°

m∡2 = 85° because it is vertical and congruent to the angle measured 85°

m∡3 = m∡1 = 95° because they are vertical and congruent

Answer:

1 = 95, 2 = 85, 3 = 95

Step-by-step explanation:

2 is an opposite angle of 85 degrees so 2 is 85 degrees

a line is always 180 degrees:

1 = 180 - 85 = 95 degrees

1 is an opposite angle of 3 so 3 is also 95 degrees

The circumference of a circle is 97 m. Find its diameter, in meters.

Answers

Answer:

C/π = 97 / π ≈ 97 / 3.141592653589793 ≈ 30.876058959827695 m (you can round as you please)

A student loan needs to be paid off beginning the first year after graduation. Beginning at Year 1, there is $52,000 remaining to be paid. The graduate makes regular payments of $8,000 each year. The graph shows the sequence. f(x)=?​

Answers

Answer:

The equation is: [tex]f(x) = 52000 - 8000x[/tex]

Step-by-step explanation:

Given

Initial = 52000

Rate = 8000 each year

Required

Determine the equation of the graph

The equation can be determined using.

[tex]Amount = Initial - Rate* Years[/tex]

We used minus (-) because, the amount reduces as the student pays.

Let

[tex]y = Amount[/tex]

[tex]x = Years[/tex]

So, we have:

[tex]y = Initial - Rate * x[/tex]

Substitute values for Initial and Rate

[tex]y = 52000 - 8000 * x[/tex]

[tex]y = 52000 - 8000x[/tex]

Express as a function:

[tex]f(x) = 52000 - 8000x[/tex]

PLS HELP GIVING BRAINLESS TO FIRST PERSON PLS HELP

Answers

The answer to this question is A x<8

Express as a unit rate: 20 miles in 4 hours

Answers

Answer:

5 mph

Step-by-step explanation:

Help me please. This is due tonight.

Answers

Answer:

84=40x+.22

-.22    -.22

83.78=40x

83.78/40=2.0945

you can drive at most 2 miles per day

How do you simplify (5g^4h^3)^3? Simplify using exponent rules, please do not completely answer

Answers

Answer:

5^3·g^12·h^9  or 125g^12·h^9

Step-by-step explanation:

Which number is an integer?

Answers

Answer:

there is no question for me to tell you what it is

I need help please answer

Answers

Answer:

√130

Step-by-step explanation:

_______________________

HELP THIS IS ALSO DUE TODAY

Answers

Answer:

Step-by-step explanation:vgggguiiooooo

Timothy brought in brownies for his class on his birthday.
.
.
Each box has 15 brownies in it.
He handed out 1 boxes.
of the brownies had nuts.
Problem:
How many brownies had nuts?

Answers

Answer:

Incomplete problem - reword

Step-by-step explanation:

3 brownies had nuts.

What is a Fraction?

In mathematics, a fraction is used to denote a portion or component of the whole. It stands for the proportionate pieces of the whole. Numerator and denominator are the two components that make up a fraction. The numerator is the number at the top, and the denominator is the number at the bottom. The denominator specifies the total number of equal parts in the whole, whereas the numerator specifies the number of equal parts that were taken.

As per the given data:

Brownies in each box = 15

Boxes handed out = 1 [tex]\frac45[/tex]

Brownies with nuts = (1/9) of the brownies

Boxes handed out = 1 [tex]\frac45[/tex] = (9/5) boxes

Total brownies handed out = (9/5) × 15 = 27 brownies

Total brownies with nuts = (1/9) of 27 = (27/9) = 3 brownies with nuts.

Hence, 3 brownies had nuts.

To learn more on Fraction, click:

brainly.com/question/29264210

#SPJ2

(The given question is incomplete, the complete question is given below)

Timothy brought in brownies for his class on his birthday. Each box has 15 brownies in it. He handed out 1 4/5 boxes. 1/9 of the brownies had nuts. How many brownies had nuts?

A fundraiser agrees to donate an extra $75 for every $100 the school raises through selling cookies what is the constant of the proportionality

Answers

Answer:

3/4 or 0.75

Step-by-step explanation:

In a right triangle, the length of one leg is 4 units. The length of the other leg is 5 units. What is the length of the hypotenuse?
A. 3
B. (the square root of) 18ft.
C. (the square root of) 20ft.
D. (the square root of) 41ft.

Answers

Answer:

D. (the square root of) 41ft.

Step-by-step explanation:

4+5=c

4^2+5^2=c^2

16+25=c

41=c

I'll mark brainly pls do this​

Answers

Step-by-step explanation:

Verbs are read, complete, checked, work, invite. Pronouns are their, your, and them. Nouns are Classroom, Zeroes, Friday, February, friends, assignment, students, trimester. Adjectives are simple, missing.

Hope this helps! If I missed some or got some wrong, please tell me! Goodbye!

You have to divid then Milton

Farmer Hernandez planted 804 rows of corn on her successful farm. Each row contained 26 individual plants. How many corn plants did Ms. Hernandez plant on her farm

Answers

Answer:30.92

Step-by-step explanation:divide 26 from 804 and you will get your answer

hope this helps

an online photo service charges 20 to make a standard photo book with 16 pages. each extra page costs 1.75 write an exspression to determine the total cost of in dollars to make a standyard photo book with p extra pages

Answers

Answer:

$20 + (1.75 * p)

Step-by-step explanation:

This is just a guess hope this is correct.

Hope this helps! :)

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