I want to be challenged more, so could anyone give me some 4th grade math problems

Mathematics

2 answers:

nexus9112 [7]3 years ago

6 0

I'm in 7th grade u want those math problems???

Alex Ar [27]3 years ago

5 0

"I have a number of red and blue marbles at first.

After I lost 1 red marble, the ratio of red to blue marbles is 1:2.

After I lost again 2 blue marbles, the ratio of red to blue marbles is now 2:3.

What was the ratio of red to blue marbles at the start?"

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find the margin of error to use for this sample mean sushi based on a sample of 35 people he average out of pieces of sushi a pe

NNADVOKAT [17]

Answer:

{13.7756,18.2244}

Step-by-step explanation:

Given the sample size, the margin of error can be calculated with the formula $M=Z*\frac{\sigma}{\sqrt{n}}$ where Z is the critical value for the desired confidence level, σ is the population standard deviation, and n is the sample size. Therefore, our margin of error for a 90% confidence level is:

$M=Z*\frac{\sigma}{\sqrt{n}}=1.645*(\frac{8}{\sqrt{35}})=2.2244$

The formula for a confidence interval is $CI=\bar{x}+M$ where x-bar is the sample mean. Therefore, the 90% confidence interval for the mean amount of sushi pieces a person can eat is: