13 Answered Questions for the topic Stat

C5.5: Suppose that the weights of all such animals can be described by a Normal model with a standard deviation of 98 pounds.

A livestock cooperative reports that the mean weight of yearling Angus steers is 1147 pounds. Suppose that the weights of all such animals can be described by a Normal model with a standard... more

03/24/21

STATISTICS HELP! 68, 95, 99.7 rule

Answer these 3 probability questions using the 68-95-99.7 rule. Draw, label, and shade a bell curve for each one.  About what percent of Nike shoe sales are ABOVE 6.5? About what percent of Nike... more

03/11/21

Statistics help!

Tennis superstar Nadal's first serve speeds in a recent season can be modeled by a normal distribution with mean 115 mph and standard deviation 6mph. let x = the speed (in mph) of a randomly... more

02/26/21

statistics help! standard deviation

The standard deviation of Y is 1.236.Choose the best interpretation of the standard deviation from those given below.A) The most common number of siblings among high school students is 1.236.B) The... more

02/26/21

statistics help! binomials

Faith is a 95% free throw shooter. At practice, each player shoots 20 free throws. Let X =the number of free throws Faith makes out of 20 shots.Enter your answers rounded to 3 decimal places. Use... more

02/26/21

STATISTICS HELP! Faith is a 95% free throw shooter. At practice, each player shoots 20 free throws. Let X = the number of free throws Faith makes out of 20 shots.

Faith is a 95% free throw shooter. At practice, each player shoots 20 free throws. Let X =the number of free throws Faith makes out of 20 shots.Which of the following explains why this scenario... more
Stat Statistics

02/13/21

Find the r b. Coefficient of determination, interpret the result c. Test the significance of r

Hrs spent studying 2 2 2 3 3 4 5 5 6 6 Grades received 57 63 70 72 69 75 73 84 82 89 a. Find the rb. Coefficient of determination, interpret the resultc. Test the significance of... more
Stat Statistics

11/17/20

Descriptive Statistics

N: 50 Min:1.00 Max:5.00 Mean: 3.9280 Std Deviation: .77065

03/15/20

A woman has 10 close friends whom she wants to invite to her birthday dinner.

a. In how many ways can she invite 8 or more friends to her party? b. In how many ways can she seat her 10 friends around a circular table?

10/25/19

HELP! STAT REVIEW QUESTIONS

1) Forty percent of the english students at Parkway High school had Dr.Mima for history, and the rest had Dr. P. Thirty percent of Dr.Mima's students earn an A in probability, while only ten... more
Stat Math Cal Mathem

07/11/19

Math word problem

A motorboat takes 5 hours to travel 200 km going upstream. The return trip takes 4 hours going downstream. What is the rate of the boat in still water and what is the rate of the current?
Stat Statistics

04/01/19

Normal Distribution

The scores on an entrance exam to a university are known to have approximately normal distribution with a mean 65% and standard deviation 7.1%. what percentage of students would score 70 or better... more
Stat

11/18/18

I need help pls.

Assumes that a set of test score is normally distributed with a mean of 80 and a standard deviation of 25,use the 68-95–99.7 rule to find the following quantity:The percentage of scores greater... more

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