90%: 1548.6201 to 1591.3799

95%: 1536.5330 to 1603.4670

asked 2021-08-03

$19.17,$21.18,$20.38,$25.08

Construct the \(\displaystyle{90}\%\) confidence interval for the average amount spent by 10 to 11 year olds on a trip to the mall. Assume the population is approximately normal.

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Step 4 of 4 : Construct the \(\displaystyle{90}\%\) confidence interval. Round your answer to two decimal places.

asked 2021-05-09

a. What is the value of the sample mean resonance frequency?

b. The confidence level for one of these intervals is 90%90%and for the other it is 99%99%. Which is which, and how can you tell?

asked 2021-03-06

asked 2021-05-29

asked 2020-11-10

Here is a sample of amounts of weight change (kg) of college students in their freshman year: 10, 7, 6, -7, where -7 represents a loss of 7 kg and positive values represent weight gained. Here are ten bootstrap samples: \(\displaystyle{\left\lbrace{10},{10},{10},{6}\right\rbrace},{\left\lbrace{10},-{7},{6},{10}\right\rbrace},{\left\lbrace{10},-{7},{7},{6}\right\rbrace},{\left\lbrace{7},-{7},{6},{10}\right\rbrace},{\left\lbrace{6},{6},{6},{7}\right\rbrace},{\left\lbrace{7},-{7},{7},-{7}\right\rbrace},{\left\lbrace{10},{7},-{7},{6}\right\rbrace},{\left\lbrace-{7},{7},-{7},{7}\right\rbrace},{\left\lbrace-{7},{6},-{7},{7}\right\rbrace},{\left\lbrace{7},{10},{10},{10}\right\rbrace}\). a) Using only the ten given bootstrap samples, construct an 80% confidence interval estimate of the mean weight change for the population.

\( kg<{\mu}<kg\)

asked 2021-08-10

Choose 2 answers in nearest unit (ones) or in whole number.

Example, if your answer is \(\displaystyle{888.83}\leq\mu\leq{899.56}\), choose 889 and 900.

\(\begin{array}{|c|c|}\hline 775 & 773 & 807 & 797 & 791 & 769 & 789 & 768 & 805 & 763 & 771 & 792 \\ \hline \end{array}\)