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Results from previous studies showed 79% of all high school seniors from a certain city plan to attend college after graduation. A random sample of 200 high school seniors from this city reveals that 162 plan to attend college. Does this indicate that the percentage has increased from that of previous studies? Test at the 5% level of significance. What is your conclusion?
Is the correct answer? Do not reject H0. There is not enough evidence to support the claim that the proportion of students planning to go to college is greater than .79.
What is the probability that the percentage in the sample will deviate from the population percentage by no more than 7 percentage points?
Media Disk, Inc. duplicates over a million 3.5" floppy disks each year by copying masters to stacks of blank disks. The company buys its blank stock from two different suppliers, A and B.
The standard deviation of the sample was 1.7 years. Using the 0.95 degree of confidence, what is the confidence interval within which the population mean lies?
Figures for the yearly crime rate (the number of crimes per 1,000 population) in Mississippi, USA from 1993 to 2002 are as follows:
in a sample of 47 adults selected randomly from one town it is found that 9 of them have been exposed to a particular
1.in which of the following situations is bootstrapping and other resampling methods often used?a.when data have been
Determine what analysis would you do on each problem (ie, one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
a nursing school wants to estimate the true mean annual income of its alumni. it randomly samples 120 of its alumni.
The last lessons have spent a lot of time describing the slope and intercept terms (and their variances) of the one-variable sample regression function.
The confidence interval estimate of the population mean will be __________ for a 95% confidence level than for a 90% confidence level. Narrower or Wider?
Find all similarity classes of 6x6 matrices over Q with minimal polynomial (x+2)^2(x-1) (it suffices to give all lists of invariant factors and write out some of their corresponding matrices).
Determine the mean and the standard deviation of the following frequency distribution. (Round your answers to 2 decimal places.)
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