0

Displaying 31-40 of 83 results.

Fresh water fish have a mean length of 20cm and a standard deviation of 6cm. What percentage of the fish in this lake measure between 15cm and 22cm long?

Posted 2 years ago by **Buddy0411** in Math 12 University - Data Management | 0 answers

#probability

There are 6 people having a race: Amy,Bob,Chloe,Dave,Earle, and Fran.What is the probability Amy finishes before Chloe who finishes before Fran?

Posted 2 years ago by **shannonhj** in Math 12 University - Data Management | 0 answers

#data management

Please answer each question separately.

1.Find the z-score for x = 8 if the mean is 7 and the standard deviation is 2.

2.Find the percentile for x = 8 if the mean is 7 and the standard deviation is 2.

3. IQ scores of people is distributed, with a mean of 100 and a standard deviation of 15. A genius is someone with an IQ greater than or equal to 140. What percent of the population is considered genius?

4. The Weights of 100 remote control cars at a competition are approximately normally distributed. The average weight is 3.2 kg, with a standard deviation of 0.4 kg.

i) How many remote control cars would be disqualified if it were against the rules to have a car with a weight of more than 4 kg or less than 2.4 kg?

ii) A car is said to be in the 90th percentile. How much does it weigh?

Posted 2 years ago by **karinaaaaaaa** in Math 12 University - Data Management | 1 answers

#probability #data management

Please answer each question sepretly.

1.Find the z-score for x = 8 if the mean is 7 and the standard deviation is 2.

2.Find the percentile for x = 8 if the mean is 7 and the standard deviation is 2.

3. For a mean of 20 and standard deviation of 5, find .

4. For a mean of 75 and a standard deviation of 3, find .

5. For a mean of 153 and standard deviation of 25, find .

6. IQ scores of people around the World are normally distributed, with a mean of 100 and a standard deviation of 15. A genius is someone with an IQ greater than or equal to 140. What percent of the population is considered genius?

7. The Weights of 100 remote control cars at a competition are approximately normally distributed. The average weight is 3.2 kg, with a standard deviation of 0.4 kg.

I) How many remote control cars would be disqualified if it were against the rules to have a car with a weight of more than 4 kg or less than 2.4 kg?

II) A car is said to be in the 90th percentile. How much does it weigh?

Posted 2 years ago by **karinaaaaaaa** in Math 12 University - Data Management | 1 answers

#data management #probability

Please answer all questions sepretly: Bottle Caps

A machine produces bottle caps. The machine is calibrated to produce bottle caps with a mean diameter of 2.8 cm and standard deviation of 0.03 cm. Let X represent the random variable for diameter of bottle caps. Leave your answers as a percent without rounding.

1. What percent of bottle caps are between 2.77 cm and 2.83 cm?

2. Find P(2.74 ≤ x ≤ 2.86)

3. What percent of bottle caps are less than 2.71 cm?

4. Find P(X ≥ 2.86)

5. What percent of bottle caps are exactly 2.8 cm?

6. If all caps that are smaller than 2.71 cm and greater than 2.89 cm are rejected/thrown out, what percent would be lost?

These are about the frequency polyon:

7.Does the total area under a probability density equal 1.

8.Does the total area under the relative frequency polygon equal 1 if the interval size is 1?

9.Do smaller interval sizes always allow you to get a smoother polygon that will better represent the data?

10.Is the interval size chosen when the difference between the polygon and the histogram bars is as small as possible?

11. Does the interval size depend on the number of data points?

Posted 2 years ago by **karinaaaaaaa** in Math 12 University - Data Management | 1 answers

#data management #frequency polygon #the normal curve

Bottle Caps

What percent of bottle caps are between 2.77 cm and 2.83 cm?

A:

Find P(2.74 ≤ x ≤ 2.86)

A:

What percent of bottle caps are less than 2.71 cm?

A:

Find P(X ≥ 2.86)

A:

What percent of bottle caps are exactly 2.8 cm?

A:

If all caps that are smaller than 2.71 cm and greater than 2.89 cm are rejected/thrown out, what percent would be lost?

A:

Men's Shoe Designer

A men's shoe designer is willing to accommodate 95% of the male population. If the mean foot length is 25.25 cm and the standard deviation is 3.875 cm, answer the following:

What is the smallest foot length the designed is willing to accommodate?

A:

What is the largest foot length the designed is willing to accommodate?

A:

Posted 2 years ago by **karinaaaaaaa** in Math 12 University - Data Management | 4 answers

#probability #data management

how many unique arrangments can you make using the letters HALLOWEEN if the E's must be apart ?

Posted 2 years ago by **spava** in Math 12 University - Data Management | 0 answers

#data management

Which of the following is required in order to draw a box & whisker plot? mean

number of data elements

frequency

median

Posted 2 years ago by in Math 12 University - Data Management | 0 answers

#data management

Jenna estimates that she has an 85% chance of finishing her Math homework and a 70% chance of finishing her science homework. What is the probability that she won't finish either homework?

Posted 2 years ago by in Math 12 University - Data Management | 2 answers

#probability #data management

what is the aroc of $f\left(X\right)=x^2-4x+7$ƒ (X)=x^{2}−4x+7 on the interval 1 $\le$≤ $x$x $\le$≤ 3

Posted 2 years ago by **oluarry** in Math 12 University - Advanced Functions | 0 answers

#functions