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krek1111 [17]
3 years ago
5

In constructing a confidence interval estimate for a population mean, when we replace S with the sample standard deviation (s),

we introduce a new source of variability and the sampling distribution we use is:A. the normal distribution B. F- distribution C. chi-square distribution D. t -distribution
Mathematics
1 answer:
Akimi4 [234]3 years ago
7 0

Answer:

D

Step-by-step explanation:

When the population standard deviation is unknown while constructing the confidence interval then the estimate of standard deviation calculated from sample is used and due to this the new type of variability arise and then for conducting a confidence interval for mean the t-distribution is used. For calculating confidence interval for mean there are two sampling distributions z distribution and t distribution. When sample size is small and population standard deviation is unknown then t-distribution is used.  

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Step-by-step explanation:

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2 years ago
Michelle is trying to buy a car that costs $35,550, and she has saved up $20,700. She borrowed the remaining amount that she nee
Dimas [21]

Answer: $ 4,515

Step-by-step explanation:

\\The cost of the car she wanted to buy = $35,550

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\\Amount borrowed from the finance company  = $35,550 - $20,700

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7 0
3 years ago
Gasoline is pumped at rate of 3 gallons per minute into a container that already has 4 gallons inside
maksim [4K]

Answer:

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Step-by-step explanation:

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Hence:

Time = 4 gallons/3 gallon per minutes

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The time at which the gasoline is pumped into the container is 1 1/3 minutes

8 0
3 years ago
Miguel has at least $250 in his savings account. Which inequality represents this situation? A. m < 250, B. m > 250, C. m
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3 years ago
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Step-by-step explanation:

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2 years ago
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