1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Marysya12 [62]
3 years ago
7

A study of tire pressure in brand new Toyotas used a sample size of 120 tires and reported a mean of 30.3 psi and a margin or er

ror of plus or minus 1.8 psi with 95% confidence. We may conclude that, with 95% confidence, the mean tire pressure of tires on new Toyota cars is between psi (lower number) and psi (higher number).
Mathematics
1 answer:
algol [13]3 years ago
8 0

Answer:

28.5 psi and 32.1

Step-by-step explanation:

Since the question already provided the mean (30.3 psi) and the margin of error with confidence of 95% (+ or - 1.8 psi), simply add and subtract the margin of error to the mean value to find the confidence interval:

Lower bound:

L = 30.3 - 1.8 = 28.5

Upper bound:

H = 30.3 +1.8 = 32.1

Therefore, the mean tire pressure of tires on new Toyota cars is between 28.5 psi and 32.1 psi.

You might be interested in
Each month for 7 months, Eve reads 3 books. How many more books does she need to read before she has read 30 books?
enot [183]
How many books has she read so far? She's been doing this for 7 months, so so far she's read:

7*3=21

how many does she still need to read?

30-21=9

so she needs to read 9 more books. With 3 books a month, this means:

9/3=3

so she needs to read 9 more books, which will take her 3 months!
6 0
3 years ago
Lisa's store collects 5% sales tax on every item sold. If she collected $22.00 in sales tax, what was the cost of the items her
Ede4ka [16]
Since we are looking for the principal amount, then all we have to do is reverse the process of getting the amount of tax. In order to get the principal, you just have to divide 22 with 0.05. The answer is 440 so that is the principal amount you are looking for.
5 0
3 years ago
I dont get this question, anyone help me please
prisoha [69]
Its a line plot, for every number that is listed put a mark above the number on the number line. So if there was 3 6's, on the number line above the 6, put 3 marks like dots or x's to represent the amount of 6.
Hope you understand.
4 0
3 years ago
Answer all please ❤️
IRINA_888 [86]
1: 0.5 and 50%

2: .2 and 20%

3: .75 and 75%

10: (1/10) and 10%

11: (3/5) and 60%

12: (1/4) and 25%
6 0
3 years ago
Read 2 more answers
What is the answer please help!!!!!
insens350 [35]
What is the question please help!
6 0
3 years ago
Other questions:
  • In a certain community, 36 percent of the families own a dog and 22 percent of the families that own a dog also own a cat. In ad
    7·1 answer
  • Two less than two thirds times a number is ten
    15·1 answer
  • What the answer?? Help me pls!
    12·2 answers
  • Plz help me plz if u get it correct i will mark brainlist if i can
    11·2 answers
  • Write the equation of a line in the given form.
    5·1 answer
  • PLEASE ANSWER THIS QUESTION,ILL MARK YOU AS THE BRAINLIEST IF UR ANSWER IS CORRECT.
    12·1 answer
  • A small town decided to get into the holiday spirit during Halloween. Every person in
    15·1 answer
  • 12. Multistep A farmer needs to buy fertilizer for two fields. One field
    5·1 answer
  • An= a +(n-1) (-2)<br><br><br><br> Find a10 for the sequence that follows the rule
    12·2 answers
  • 90 points given asap!! please help!
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!