Mathematics, 06.04.2021 03:50, mayalp
In a random sample of 8 people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.4 minutes. A 90% confidence interval using the t-distribution was calculated to be (30.5,40.5). After researching commute times to work, it was found that the population standard deviation is 9.3 minutes. Find the margin of error and construct a 90% confidence interval using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results.
Answers: 3
Mathematics, 21.06.2019 20:50, kassandramarie16
Amanda went into the grocery business starting with five stores. after one year, she opened two more stores. after two years, she opened two more stores than the previous year. if amanda expands her grocery business following the same pattern, which of the following graphs represents the number of stores she will own over time?
Answers: 3
Mathematics, 21.06.2019 22:30, kdtd3163
In a certain city, the hourly wage of workers on temporary employment contracts is normally distributed. the mean is $15 and the standard deviation is $3. what percentage of temporary workers earn less than $12 per hour? a. 6% b. 16% c. 26% d. 36%
Answers: 1
Mathematics, 21.06.2019 22:30, hannahkharel2
What is the least common multiple for 6 and 8? what is the least common multiple for 4 and 12 ? what is the least common multiple for 11 and 12? what is the least common multiple for 3 and 6?
Answers: 1
Mathematics, 22.06.2019 00:30, winterblanco
1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.
Answers: 2
In a random sample of 8 people, the mean commute time to work was 35.5 minutes and the standard dev...
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