Without wait tracking system- \( 24,67,17,19,31,43,12,23,17,37 \) With wait tracking system- \( 31,12,13,18,12,37,9,14,12,16 \) What are the variance and standard deviation of patient wait times for offices with a wait tracking system? What are the variance and standard deviation of patient wait times for visits to offices without a wait tracking system? Please round the answers to 2 decimal place.

Use the technique of linear regression to find the line of best fit for the given points. Round any intermediate calculations to no less than six decimal places, and round the coefficients to two decimal places. Answer \( (1,10),(2,6),(3,3),(4,10),(5,4),(6,3),(7,2) \)

Uma escola de \( 1^{10} \) grau abriga 124 alunos. Obtenha uma amostra representativa cor- respondendo a \( 15 \% \) da população. Sugestão: use a \( 8^{a}, 9^{a} \) e \( 10^{a} \) colunas, a partir da \( 1^{\text {a }} \) linha, da Tabela de Números Aleatórios (de cima para baixo).

A survey asks 192 people "What beverage do you drink in the morning?", and offers choices: - Coffee only - Tea only - Both tea and coffee - Neither tea nor coffee Suppose 32 report tea only, 48 report coffee only, and 36 report both. How many people drink tea in the morning? How many people drink coffee in the morning? Create a venn diagram with this information and submit it. Choose File No file chosen Question Help: Video Check Answer

4) In a telephone poll of 25 people, 9 people said they like shopping. What is the ratio of the number of people who do not like shopping to the number of people who like shopping? \[ 16: 9 \] \( 50: 16 \)

Find the mean time of Bert's last five downhill skiing runs: 98 sec , \( 90 \mathrm{sec}, 102 \mathrm{sec}, 97 \mathrm{sec} \), and 113 sec .