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According to a study reported in the New York Times, 48% of the viewers who watched NFL Football on TiVo viewed 1 to 6 commercials, while 26% of the viewers who watched Survivor: Cook Islands on TiVo viewed 1 to 6 commercials.
If this information is based on two independent random samples of 200 viewers each, test for equality of proportions using α = 0.05.
(a) Create a table to organize the above information and help solve the problems below. (b) Find the probability of a positive test for a patient with cancer (the sensitivity). (c) Find the probability of a negative test for a patient without cancer ..
A random sample of 36 cars showed a mean repair cost of $330, with a standard deviation of $120. What can you tell the city fathers?
Based on the information presented, do you think that the investigators used a descriptive or inferential approach? If inferences are being drawn, what is the main question being addressed?
By using significance level a = .05, and suppose a normal distribution what does evidence conclude?
A photo-sharing startup offers the following service. A client may upload any number N of photos and the server will compare each of the N pairs of photos with their proprietary image matching algorithms to see if there is any person that is in bo..
How large a sample should be selected in order to estimate the population proportion to within a margin of error of 0.02 with 97% confidence. The sample proportion from the preliminary sample was 0.18.
When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
Find the P value for the indicated hypothesis test with the given standardized test statistic, z. Decide whether to reject H0 for the given level of significance deviation. Two-tailed test with test statistic z= -2.43 and standard deviation = 0.04..
1. in a criminal trial a type ii error is made when aana. innocent person is convicted.b. guilty defendant is
Suppose that distinct integer values are written on each of 3 cards. These cards are then randomly given the designations A, B, and C. The values on cards A and B are then compared. If the smaller of these values is then compared with the value on..
1. for a standard normal model find the z-value that is less than the mean and for which 67 of the area under the
Statistical Hypothesis testing - Frequency distribution
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