Which statement is true? a) point estimates are used to make inferences about population parameters. b) when we use the population mean and proportion to summarize information about the entire population, we call them point estimates. c) the population mean and proportion are always equal to their corresponding point estimates. d) the sample mean and sample proportion of a population are called population parameters.

a) Point estimates are used to make inferences about population parameters.

Explanation:

Point estimation is defined as an approximate and single numeric value representing a population. This is given as an estimate of a parameter of certain population. So, population parameter helps in determining a population by randomly selecting a part of people from that population through some survey.

isaiah walks 3 miles due north, turns and then 5 miles due east. how far is he from his starting point?

a^2 + b^2 = c^2

let c = distance from starting point.

(3)^2 + (5)^2 = c^2

9 + 25 = c^2

34 = c^2

sqrt{34} = sqrt{c^2}

sqrt{34} = c

she will sew have sewn five dresses   and be 1/3 done with the sixth one in an hour.

step-by-step explanation:

3/4 of an hour=45 mins

lucy makes 1 dress per 11.25 minutes

45 mins+11.25 mins=56.25 mins

60 mins- 56.25 mins=3.75 mins

3.75 mins is 1/3 of of 11.25 mins

therefore she the other 1/3 would be part of the hour and she will have sewn 5 dresses and begun the sixth.

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