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The photography department of a fashion magazine needs to choose a camera. Of the two models the department is considering, one is made by Nikon and one by Minolta.
The department contracts with an agency to determine if one of the two models gets a higher average performance rating by professional photographers, or whether the average performance ratings of these two cameras are not statistically different. The agency asks 60 different professional photographers to rate one of the cameras (30 photographers rate each model). The ratings are on a scale of 1 to 10. The average sample rating for Nikon is 8.5, and the sample standard deviation is 2.1.
For the Minolta sample, the average sample rating is 7.8, and the standard deviation is 1.8. Is there a difference between the average population ratings of the two cameras? If so, which one is rated higher?
Directions: After you complete the readings, complete this assignment. Answer the questions with a minimum of one paragraph per question, using complete sentences. List all references that you use.
from a class survey approximately 32 of the students responding said that they have driven a vehicle while under the
When is an ANOVA test used? What does it determine? When is a Chi-Squared used? What does it determine? When is MANOVA used? What does it determine? What is a category scheme in qualitative data?
an inspector obtains four samples with three observations in each. the actual measurements in centimeters are shown
A cutting operation. A machine tool in your plant is cutting an outside diameter. A sample of 4 pieces is taken near the end of each hour of production. Table 27.7
The sample mean difference was 0.41 and Sd was 0.387.
A researcher is conducting proportionate stratified random sampling with a sample size of 250. Approximately how many people should be sampled from each stratum?
Crude oil is pumped at a rate of 100,138 kg/h from a point 255 meters below the earth's surface to a point 30 meters above ground level. Calculate the attendant rate of increase of potential energy in kW.
a deck of cards is shuffled and you choose one at random observe its colour and replace it in the set. the cars are
Based on this data can the college conclude that the students in the new program performed better than the rest of the class> A one-tailed test is used equalling .05
the entrance exam at a university is normally distributed with a mean of 520 and a standard deviation of 75. if only
Do the data provide significant support for any preferences among the three brands? Test At the .05 level of significance.
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