Question

a. For classes of 243 ​students, find the mean and standard deviation for the number born...

a. For classes of

243

​students, find the mean and standard deviation for the number born on the 4th of July. Ignore leap years.

b. For a class of

243

​students, would two be an unusually high number who were born on the 4th of​ July?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

thank you

please upvote

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
If, in a class of 50 students, the grades are normally distributed with a mean of...
If, in a class of 50 students, the grades are normally distributed with a mean of 76 and a standard deviation of 10 points, what minimum grade would a student have to get to be considered "unusually" high? (more than two standard deviations above mean)
An examination was given to two classes consisting of 40 and 50 students, respectively. In the...
An examination was given to two classes consisting of 40 and 50 students, respectively. In the first class the mean grade was 74 with a standard deviation of 8, while in the second class the mean grade was 78 with a standard deviation of 7. Is there a significant difference between the performance of the two classes at a level of significance of 5%?
(SHOW YOUR WORK!!!) Eight high school teachers were asked to give the number of students in...
(SHOW YOUR WORK!!!) Eight high school teachers were asked to give the number of students in their classes. The sample data is: 36, 32, 31, 23, 18, 24, 34, 28. a.) Find the mean and standard deviation of the data. b.) Find the five number summary of the data.
There are 2 classes. Afternoon class with mean = 70 and standard deviation is 15 Morning...
There are 2 classes. Afternoon class with mean = 70 and standard deviation is 15 Morning class with a mean = 70 and standard deviation of 5. The spread of grades in the morning class has less variation and located mostly around the mean.   According to emperical rule (assuming grades are normally distributed) it says, 68% of grades are falls within 1 standard deviation, 95% of grades falls within 2 standard deviation and 99.7% of grades falls within 3 standard...
Ten percent of American adults are left-handed. A statistics class has 30 students in attendance.                           &
Ten percent of American adults are left-handed. A statistics class has 30 students in attendance.                                                                                                                          (6) Find the mean for the number of left-handed students in such classes of 30 students. Find the standard deviation for the number of left-handed students in such classes of 30 students. Would it be unusual to survey a class of 30 students and find that 8 of them are left-handed? Why or why not?
Students at Claremore High School cut an average of 3.3 classes per month. A random sample...
Students at Claremore High School cut an average of 3.3 classes per month. A random sample of 125 seniors averages 3.8 cuts per month, with a standard deviation of 0.53. Are seniors significantly more likely to cut class than the student body as a whole? What is your estimate for the population mean number of classes cut per month by all seniors?
On a given Sunday, 25 children were born at a maternity ward. (a) On an average,...
On a given Sunday, 25 children were born at a maternity ward. (a) On an average, out of these children, how many girls are expected? (b) What is the standard deviation in the number of girls? (c) What would be the usual range for the number of girls? (d) Given the above, would 17 girls be unusually high? (e) What is the probability that at least 15 of the children are girls? [HINT: Binomial distributio
The mean critical reading SAT score is 501, with a standard deviation of 112. A particular...
The mean critical reading SAT score is 501, with a standard deviation of 112. A particular high school claims that its students have unusually high critical reading SAT scores. A random sample of 50 students from this school was selected, and the mean critical reading SAT score was 515. a.) Is the high school justified in its claim? Explain.
On a given Sunday, 14 children were born at a maternity ward. a. On an average,...
On a given Sunday, 14 children were born at a maternity ward. a. On an average, out of these children, how many girls are expected, what is the standard deviation in the number of girls? b. What would be the usual range for the number of girls? c. Given the above, would 9 girls be unusually high? d. What is the probability that at least 10 of the children are girls? Show work/excel commands for binomial dist.
Question 4: I was 0 when I was born. How old were you, Mom? Students in...
Question 4: I was 0 when I was born. How old were you, Mom? Students in a different statistics class were asked to report the age of their mothers when they were born. Here are the summary statistics: Sample size: 28 sample mean: 29.643 years sample stDev: 4.564 years a. Calculate the standard error of this sample mean. b. Determine and interpret a 90% confidence interval for the mother’s mean age (at student’s birth) in the population of all students...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT