To estimate the mean score μ μ of those who took the medical college admission test on your campus, you will obtain the scores of an srs of students. from published information you know that the scores are approximately normal with standard deviation about 6.6 6.6 . you want your sample mean ¯ x x¯ to estimate μ μ with an error of no more than 1.1 1.1 point in either direction. (a) what standard deviation must ¯ x x¯ have so that 99.7 % 99.7% of all samples give an ¯ x x¯ within 1.1 1.1 point of μ μ ? use the 68 – 95 – 99.7 68–95–99.7 rule. (enter your answer rounded to four decimal places.) standard deviation of ¯ x = x¯= (b) how large an srs do you need in order to reduce the standard deviation of ¯ x x¯ to the value you found? (enter your answer rounded to the nearest whole number.) srs size =

hey there!

if she's saving for six months, let's divide the total number we need for the trip by six, dividing it into the amount that needs to be saved for each month.

500 ÷ 6 =

she needs to save at least this amount each month, so we should use this symbol: ≥

let x be the amount she saves each month.

your final answer is x ≥

hope this !

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500

answer: what are the following choices

answer: bea's uncle is 25 years old.

step-by-step explanation:

given the equation , we can say that the variable "x" represents the age of bea's uncle. then to find his age, we need to solve for "x":

we must add 15 to both sides of the equation:

now we need to divide both sides of the equation by 3:

therefore, we can conclude that bea's uncle is 25 years old.