the memory card on a digital camera can hold about 430 pictures.briana used 20% of the memory card while taking pictures at a fa
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Answer:
Area of the circle =
Step-by-step explanation:
Radius of the circle=
Area of the circle=
As,
Area of the circle is:
The Area of the circle is :
Answer:
The estimate is
Step-by-step explanation:
From the question we are told that
The sample size is n = 522
The sample proportion of students would like to talk about school is
Given that the confidence level is 90 % then the level of significance can be mathematically evaluated as
Next we obtain the critical value of from the normal distribution table, the value is
Generally the margin of error can be mathematically represented as
=>
=>
Generally the estimate the proportion of all teenagers who want more family discussions about school at 90% confidence level is
substituting values