If we have a distribution of x values that is more or less mound-shaped and somewhat symmetric, what is the sample size n needed to claim that the distribution of sample means x from random samples of that size is approximately normal?

Approximately 30 or more

Step-by-step explanation:

The term 'more or less mound-shaped and somewhat symmetric' indicates that the sample distribution is already somewhat towards normal distribution. According to Central Limit Theorem (CLT), if the sample size is large enough and have the distribution in the mound-shaped size, then the sample distribution will be approximately distributed.

There is no actual specific value to determine how large enough a sample should be. However, many literatures and experts suggests that the value should be at least 30 or more

answer is the third choice:

3x^5+4x^4+x^3+2x^2-10x-7=0

step-by-step explanation:

answer: input the dimensions of the room to be painted. click the button to calculate the amount of paint and man-hours needed for this job.

interior paint coverage depends on the brand of paint used. the coverage amount is listed on the label of the paint can. use this to adjust the values in the paint coverage section below. paint usually is applied at 350 to 400 square feet per gallon (primer at 200 to 300 square feet per gallon).

step-by-step explanation: