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Ksivusya [100]
3 years ago
5

Kylie has only quarters and nickels in a jar the total value in the jar is $2 if there are a total of 20 coins how many of each

type of coin are in the jar​
Mathematics
1 answer:
alexdok [17]3 years ago
6 0

Answer: 7quarters and 3 nickels

Step-by-step explanation:

7=$1.75 3=.15

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Katherine buys a tv with a normal price of $200 and she has a 25% off coupon. How much money did she save????
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Given:

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If the inspection division of a county weights and measures department wants to estimate the mean amount of
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Given 95% confidence level, standard deviation=0.05.

We know that margin of error is the range of values below and above the sample statistic in a confidence interval.

We assume that the values follow normal distribution. Normal distribution is a probability that is symmetric about the mean showing the data  near the mean are more frequent in occurence than data far from mean.

We know that margin of error for a confidence interval is given by:

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Solving for n using formula of margin of error.

n=(z/2ST/Me)^{2}

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=96.4

By rounding off we will get 97.

Hence the sample size required will be 97.

Learn more about standard deviation at brainly.com/question/475676

#SPJ4

The given question is incomplete and the full question is as under:

If the inspection division of a county weights and measures department wants to estimate the mean amount of soft drink fill in 2 liters bottles to within (0.01 liter with 95% confidence and also assumes that standard deviation is 0.05 liter. What is the sample size needed?

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