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Compute probability value using normal distribution. X has a normal distribution with a mean of 80.0 and a standard deviation of 3.5. Find the following probabilities:
(A) P(x < 77.0)
(B) P(76.0 < x < 82.0)
(C) P(x>87.0)
For the 20 test scores shown, find the percentile rank for a score of 86.
Which statement is true for a statistical study?
200 people were surveyed and asked to rate mayor Michael Bloombergs effectiveness towards education. The rate scale is 1 (lowest) to 10 (highest). Mayor Bloomberg's average rating was 7.50, with a standard deviation of 2
Determine 80% confidence interval for average weights of Allen's hummingbirds in study regions. Determine the margin of error?
Discuss whether the percent distribution of the cross-tab and chi-square supports/does not support the researcher's hypothesis.
We want to estimate the population mean within 5, with a 99% confidence level. The population std dev is estimated to be 15. How large is the required sample size?
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
the maximum point total for the quarter was 200. The point totals for the 10 students are given in the stemplot below. For the density curve displayed below, which of the following is true?
In ANOVA, which of the following is not affected by whether or not the population means are equal?
The management of White companies considering a new method of assembling its golf cart. Compute which assembly time using the new method is faster.
Assume that the amount your town's population grows every year is fixed or constant. Utilize your equation in part b to approximate the population in the year 2030.
The upper limit of a 95% confidence interval for the population mean would equal:
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