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A California university is investigating expanding its evening programs. It wants to target people between 25 and 55 years old who have completed high school but did not complete college or university. To help determine the extent and type of offerings, the university needs to know the size of its target market. A survey of 320 California adults was drawn, and each person was asked to identify his or her highest educational attainment. The responses are (1) Did not complete high school (2) Completed high school only (3) Some college or university (4) College or university graduate. The statistical Abstract of the United States (2009, Table 16) indicates that there are 25,179,000 Californians between ages 25 and 55. Estimate with 95% confidence the number of Californians between 25 and 55 years of age who are in the market segment the university wishes to target.
What are the appropriate H0 and Ha for each of the following research studies? In addition, note whether the hypothesis test is one- or two-tailed.
Their initial expenditure would be drilling, which would cost $80,000. If they strike gas, they would have to spend an additional $50,000 to cap the well and provide for the necessary hardware and control equipment.
Can we compute the mean length of stay of workers at the company differs from the mean length of stay at that dangerous industry.
A school administrator randomly selects 12 classes from your school and then selects all of the students of those classes to study a school library issue. Which type of sampling design is being used.
For the following independent random samples, use the z-test and the 0.01 level of significance in testing Ho:u1 = u2 versus H1:u1 = u2.
What are the limits of the 99% prediction interval of the daily sales in dollars of an individual grocery store that has spent $3000 on advertising expenditures?
question3.1 3.7 3.2 4.0 3.1 4.1 3.7 3.8 3.7 3.4 3.5 3.7 3.9 3.2 3.7 3.6 3.8 3.5 3.7 3.6 4.1 3.3 3.2 3.8 3.8 3.5 3.8 4.0
Assume that the population of heights of treated plants is normally distributed with mean. Based on the sample, can it be concluded that is different from centimeters? Use the level of significance. Perform a two-tailed test. Then fill in the table..
A sample standard deviation of 25 a sixth baby has a birth weight of 125. After the sixth baby, the sample standard deviation is?
A report states that 46% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 3% with 96% confidence?
a small company has 10 employees that receive a monthly paycheck and you calculate the mean and standard deviation for
the supplies for the construction of a reinforced concrete building are supplied by the company a and b. the company a
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