What is the Prediction Interval (1 decimal)? Lower value: Upper value: The Confidence Interval will be __________ (wider or narrower) than the Prediction Interval. Which interval is the appropriate one to use when estimating the average starting salary for students with a 6.8 GPA? Confidence Interval Prediction Interval
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What is the Prediction Interval (1 decimal)?
Lower value:
Upper value:
The Confidence Interval will be __________ (wider or narrower) than the Prediction Interval.
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- Recent revenue shortfalls in a southern state led to a reduction in the state budget for higher education. To offset the reduction, the largest state university proposed a 20%20% tuition increase. It was determined that such a large increase was needed to simply compensate for lost support from the state. Random samples of 100 freshmen, 100 sophomores, 100 juniors, and 100 seniors from the university were asked whether they were strongly opposed to the increase, given that it was the minimum increase necessary to maintain the university’s budget at current levels. The results are given in the table. Strongly opposed Freshman Sophomore Junior Senior Yes 78 72 58 36 No 22 28 42 64 What is the contribution to the chi‑square statistic from the cell of strongly opposed juniors? = 0.1551 =3 =9 =0.1475The U.S. Bureau of Printing and Engraving is responsible for printing thiscountry’s paper money. The BPE has an impressively small frequency of printingerrors; only 0.5 percent of all bills are too flawed for circulation. What is theprobability that out of a batch of 1,000 bills. At least two are too flawed forcirculation?A researcher wants to estimate the prevalence of breast cancer among women who are between 35 and 45 years of age living in Western Visayas. How many women must be involved in the study to ensure that the estimate is precise? If national data suggest that 1 in 235 women are diagnosed with breast cancer by age 40, this translates to a proportion of 0.0043 (0.43%) or prevalence of 43 per 10,000 women. Suppose the researcher wants the estimate to be within 10 per 10,000 women with 95% confidence. What would be the sample size? Show your solution including the formula you used.