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
Arturiano [62]
2 years ago
5

Current research indicates that the distribution of the life expectancies of a certain protozoan is normal with a mean of 49 day

s and a standard deviation of 10.2 days. Find the probability that a simple random sample of 64 protozoa will have a mean life expectancy of 54 or more days.
Mathematics
1 answer:
zimovet [89]2 years ago
3 0

Answer:

The probability that a simple random sample of 64 protozoa will have a mean life expectancy of 54 or more days is P(M>54)=0.00004.

Step-by-step explanation:

In this case, we have a population lifetime normally distributed with mean 49 and standard deviation 10.2.

We take a sample of size n=64.

Then, we can calculate the z-score for a sample mean M=54, in order to calculate P(M>54):

z=\dfrac{X-\mu}{\sigma/\sqrt{n}}=\dfrac{54-49}{10.2/\sqrt{64}}=\dfrac{5}{1.275}=3.922\\\\\\P(M>54)=P(z>3.922)=0.00004

The probability that a simple random sample of 64 protozoa will have a mean life expectancy of 54 or more days is P(M>54)=0.00004.

You might be interested in
3. Two numbers are in the ratio 3:5. If their difference is 12, what are the numbers?​
vladimir2022 [97]
I got 18 and 30 for my answer
8 0
3 years ago
A medical researcher needs 37 people to test the effectiveness of an experimental drug. If 101 people have volunteered for the t
Rashid [163]

Answer:

The number of ways to select 37 people from 101 is, 5,397,234,129,638,871,133,346,507,775.

Step-by-step explanation:

In mathematics, the procedure to select k items from n distinct items, without replacement, is known as combinations.

The formula to compute the combinations of k items from n is given by the formula:

{n\choose k}=\frac{n!}{k!\cdot (n-k)!}

Compute the number of ways to select 37 people from 101 as follows:

{101\choose 37}=\frac{101!}{37!\cdot (101-37)!}

        =\frac{101!}{37!\times 64!}\\\\=\frac{101\times 100\times 99\times....64!}{37!\times 64!}\\\\=5397234129638871133346507775

Thus, the number of ways to select 37 people from 101 is, 5,397,234,129,638,871,133,346,507,775.

5 0
2 years ago
Suppose that you are a member of this arbitration panel. Construct a 95% confidence interval for the true mean return of the inv
lisabon 2012 [21]

Answer:      Margin of Error = 1.944

                    Lower Bound = 3.052

Explanation:-

Attached below is a file for monthly Rate of return. Used an excel sheet to determine the confidence interval which seems relatively easier as compared to manual computation. The range below (A2:A40) shows the monthly

Functions used : Standard Deviation as= STDEV (A2:A40)

                             Sample Mean = AVERAGE(A2:A40)

                             Margin of Error = CONFIDENCE.T(D4,D5,D2)

                              Lower Bound Interval = D6-D7 = -3.052

                           

3 0
3 years ago
Joey organised a large wedding
VikaD [51]

Answer:

can you tell me more details?

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
Match the pre-image, and its clockwise rotation, with the coordinates of its image.
vladimir2022 [97]

Answer:

<h3>here its simple 0506-5-569756'567o5[76]5567=-5670;675;'6776[5]675</h3>

Step-by-step explanation:

oh and 340450=043=4-re0t4=24--44035054-23=0-65-=302=44934205=-3043504-3=-4-334=-043-40==34=40-[;'30=43-4=053=-=

5 0
3 years ago
Other questions:
  • What is 463,462 rounded to the nearest ten thousand
    5·2 answers
  • What is the first step you should do to solve this equation? 2/3x = 16
    13·1 answer
  • Susan and teo play soccer. Susan's team play every five days and twos team plays every six days when will the teams play on the
    11·1 answer
  • Find sin0, cos0, tan0
    12·2 answers
  • PICTURE ATTACHED: please answer questions worth 10 points and brainalist!!!
    6·2 answers
  • Pete ate 3/7 of a pizza if Pete ate 9 slides of the pizza how many slices were ther all together
    9·2 answers
  • Twin more than 4 times a number is -18
    10·2 answers
  • Please help ASAP!! <br> I'll mark brainliest!
    12·1 answer
  • 9° TERMINO DE 7.10.13​
    12·2 answers
  • Julio watched a movie that started at 11:30 am and ended at 2:12 pm how long was the movie
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!