Mathematics, 15.11.2019 19:31 Mariefritz13
The researchers decided to construct a confidence interval to determine if the difference of the means is significant. to determine whether the confidence interval would be reliable they create q-q plots of both random samples and see that they are approximately normal. are the requirements for constructing a confidence interval satisfied? why or why not? a. yes. the distribution of the mean for each sample is normal since the researchers can apply the central limit theorem. b. yes. the distribution of the mean of each sample is normal since the data have been determined to be normal. c. no. the distribution of the mean of each sample is not normal since the sample size is not large enough. d. no. the company needs to check that all the data combined is normal. 3. of the four types of confidence intervals listed below, which one is appropriate for this experiment? a. confidence interval for μ when σ is known. b. confidence interval for μ when σ is unknown. c. confidence interval for the mean of differences, using dependent samples. d. confidence interval for the difference of means, using independent samples.
Answers: 1
Mathematics, 21.06.2019 14:00
You and a friend race across a field to a fence and back. your friend has a 50-meter head start. the equations shown represent you and your friend's distances dd (in meters) from the fence tt seconds after the race begins. find the time at which you catch up to your friend. you: d=∣−5t+100∣d=∣−5t+100∣ your friend: d=∣−313t+50∣∣
Answers: 2
Mathematics, 21.06.2019 14:30
Brent works part-time at a clothing store. he earns an hourly wage of $15. if he needs to earn more than $45 in a day and works for x hours a day, which inequality represents this situation? a. 15x > 45 b. 15x < 60 c. x > 60 d. 15x < 45 e. x < 60
Answers: 1
The researchers decided to construct a confidence interval to determine if the difference of the mea...
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