Express the confidence interval 80.9%±4.7%80.9%±4.7% in interval form.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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Express the confidence interval 80.9%±4.7%80.9%±4.7% in interval form.

 

Express the confidence interval 67.3%±5.6%67.3%±5.6% in interval form

 

Express the confidence interval 18.9%±6.2%18.9%±6.2% in interval form

 

The average ticket price for a Spring Training baseball game is $32.68, with a standard deviation of $7.67. In a random sample of 40 Spring Training tickets, find the probability that the mean ticket price exceeds $35. (Round your answer to three decimal places)

 

The average ticket price for a Spring Training baseball game is $33.23, with a standard deviation of $6.25. In a random sample of 40 Spring Training tickets, find the probability that the mean ticket price exceeds $36. (Round your answer to three decimal places)

 

SAT scores in one state is normally distributed with a mean of 1583 and a standard deviation of 160. Suppose we randomly pick 56 SAT scores from that state.

a) Find the probability that one of the scores in the sample is less than 1634.
P(x<1634)P(x<1634) = Incorrect

b) Find the probability that the average of the scores in the sample is less than 1634.
P(¯x<1634)P(x¯<1634) = Incorrect

Enter each answer as a number accurate to 4 decimal places. 

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