Which of the following statements are correct when - 6033

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Which of the following statements are correct when deciding whether to use the z or the t distribution

a. Use zin a test of proportions when nπ and n(1 - π) are greater than or equal to 5.

b. Use z when we have a normal population and we know the standard deviation.

c. Use t when the population is normal and the population standard deviation is not known

d. All of the above statements are correct.

 
Solution Description

Which of the following statements are correct when deciding whether to use the z or the t distribution