Aresearcher collects a simple random sample of grade-point averages of statistics students, and she calculates the mean of this sample. under what conditions can that sample mean be treated as a value from a population having a normal distribution? select all that apply.

a. the sample has more than 30 grade-point averages.

b. if the population of grade-point averages has a normal distribution

c. the researcher collects more than 30 samples.

d. if the population of statistics students has a normal distribution.

A. The sample has more than 30 grade-point averages.

B. If the population of grade-point averages has a normal distribution

Step-by-step explanation:

According to the Central Limit Theorem, if the sample size is big enough(>30) and the population distribution is normal (population of grade point averages) then that sample mean be treated as a value from a population.

Population of statistics students is out of concern in this context since grade-point averages are sampled.

the most boring thing ever written

step-by-step explanation:

i am writing something. yes, i plan to make it the most boring thing ever written. i go to the store. a car is parked. many cars are parked or moving. some are blue. some are tan. they have windows. in the store, there are items for sale. these include such things as soap, detergent, magazines, and lettuce. you can enhance your life with these products. soap can be used for bathing, be it in a bathtub or in a shower. apply the soap to your body and rinse. detergent is used to wash clothes. place your dirty clothes into a washing machine and add some detergent as directed on the box. select the appropriate settings on your washing machine and you should be ready to begin. magazines are stapled reading material made with glossy paper, and they cover a wide variety of topics, ranging from news and politics to business and stock market information. some magazines are concerned with more recreational topics, like sports card collecting or different kinds of hairstyles. lettuce is a vegetable.