In a survey of 800 students,
1 answer:
The bar graph shows in the attachment bases on frequency distribution equation for Lunch is 68:22:10 which mean the equation is 68x+22y+10 is the combined information.
Step-by-step explanation:
- Column lunch and row had Pizza,Hamburger and Sloppy joe.
- The total 548,173 and 79 total to 800 students.
- Creating a bar graph series name is lunch and series value is pizza....
- hamburgers and sloppy joes.
- Frequency distribution basis on percentage involves...
- Number of categories/ Total number of students.
- 68:22:10 so the distribution has about 68 percent of people....
- Eat pizza more than hamburger and sloppy joes.
- Horizontal axis has about Pizza,Hamburger and Sloppy joes.
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Step-by-step explanation:
Given the expression:
Follow BODMAS rule.
always evaluate brackets first, followed by multiply or division then addition or subtraction from LEFT to RIGHT.
The probability that the SRS of 10 students will spend an average of between 600 and 700 dollars is 0.8132.
Let x be the total amount spent by students.
x follows normal distribution with mean μ = 650,
standard deviation δ = 120
We take a simple random sample of size n = 10
We are asked to find average spending of 10 students ( ) is between 600 and 700
We have to find P( 600 <= <= 700)
According to the sampling distribution of the sample mean , it follows an approximately normal distribution with mean μ{
} = μ and standard deviation δ{
} = {δ}/{√n}
Therefore here mean of ,( μ{
} ) = 650 and
standard deviation of , δ{
} = {120}/{√10} = 37.9473
The probability that the SRS of 10 students will spend an average of between 600 and 700 dollars is,
Let Z= x - μ / δ
Z₁ = 600 - 650 / 37.9473 = -1.32 similarly
Z₂ = 700 - 650 / 37.9473 = 1.32
From standard normal distribution table, P( -1.32 < < 1.32) = 0.8132
The probability that the SRS of 10 students will spend an average of between 600 and 700 dollars is 0.8132
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