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
kati45 [8]
3 years ago
8

A researchers wants to determine the mean weight of avocados grown in Southern California. The population from which the sample

is drawn is such that the weight of the avocados is approximately normally distributed for the sample. The size of the sample is 9, the sample mean determined from this sample is 6 ounces, and the sample standard deviation determined from this sample is 0.75 ounces. Help the researcher by determining the 90% confidence interval for the true mean weight of these Southern California avocados. (This problem will be solved after lecture on confidence intervals.)
Mathematics
1 answer:
natka813 [3]3 years ago
4 0

Answer: (0.465, 5.535)

Step-by-step explanation:

Formula to calculate the confidence interval (<em>when population standard deviation is unknown</em>) is given by :-

\overline{x}\pm t_{\alpha/2} \dfrac{s}{\sqrt{n}}

, where \overline{x} = sample mean.

s= sample standard deviation.

n= Sample size.

t_{\alpha/2} = critical value

By considering the given information , we have

\overline{x}=6

s=0.75

n= 9

Significance level = \alpha=0.1   [1-0.90=0.1]

By using students' t distribution -table , the critical value for 95% confidence level :

t_{\alpha/2 , n-1}=t_{0.1/2,\ 8}=1.86

[Note: degree of freedom = n-1]

Now, the 90% confidence interval for the true mean weight of these Southern California avocados will be :

6\pm (1.86) \dfrac{0.75}{\sqrt{9}}

6\pm (1.86) \dfrac{0.75}{3}

6\pm (1.86) 0.25

6\pm 0.465=(6-0.465,\ 6+0.465)=(0.465,\ 5.535)

Hence, the required confidence interval  =(0.465, 5.535)

You might be interested in
Please answer the question in the image below ASAP
ElenaW [278]

Answer:

c

Step-by-step explanation:

diameter will be 36, radius 18 and the height is 6

6 0
3 years ago
Solve equation 100-6r=160-10r
Verdich [7]
<span>100-6r=160-10r
Add 10r to both sides
100+4r=160
Subtract 100 from 160
4r=60
Divide 60 by 4
Final Answer: 15</span>
4 0
3 years ago
Read 2 more answers
Find the lengths of each side. Label with numbers. WILL GIVE BRAINLIEST​
choli [55]

Answer:

2 x + 6 . 8 = 8 x + I . 4

8x _2x = 6.8 - 1.4

6x = 5.4

X= 0.9

2x+ 6-8= 2×0.9 + 6.8 =8.6

5 0
3 years ago
Please help me out with this​
AURORKA [14]
6m (m+2) = 0 is the factored form
m=0, m=-2 is m

Steps are on paper
If you need more explanation, comment

4 0
3 years ago
What is the rule for the reflection?
mote1985 [20]

Answer:

Step-by-step explanation:

it’s the last one

6 0
3 years ago
Other questions:
  • Please answer only question 20.
    14·1 answer
  • What conjecture can you make about the twentieth term in the pattern A, B, A, C, A, B, A, C?
    11·2 answers
  • Maria studied the traffic trends in India. She found that the number of cars on the road increases by 10% each year. If there we
    13·1 answer
  • Cassidy is going to the county fair with her friends but can only stay at the fair for 4 hours. The fair offers two different pr
    15·2 answers
  • Please help me right away and you will get 12 points I need it done today so plz help me
    6·1 answer
  • Please solve with working really appreciate it
    8·1 answer
  • HELP ME FOR NUMBER 40 and 41
    15·2 answers
  • jim pays $75 per month for his cell phone plan plus $0.30 per minute beyond the first 1000 minutes his bill was $105.60 last mon
    12·1 answer
  • Complete the equation describing how x
    6·1 answer
  • HELPPPP NOWWWW ITS TIMEDD
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!