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A random sample of 36 radio stations is selected in order to estimate the avaerage charge for the same fixed-length spot announcement. The sample mean and standard deviation are $20.00 and $8, respectively. Assume that the charges made by all radio stations of the type sampled are approximately normally distributed. Construct the 95% confidence interval for the population mean.
What is the answer to the following unsorted data shows the number of traffic tickets given each day by Deputy Fife over the last eleven days.
Calculate the interquartile range and construct the less then give
A professor wants to determine if his class' anxiety decreases over the course of the semester. He uses a test to measure a random sample of all students enrolled at midterm and again at the end of the course.
Student A and B took different statistics classes and 2 different finals. Student A had a score of 83 out of 100 and ranked 72 in his class. Student b scored 85 out of 100 and he ranked in the 70 percentile of his class.
from these data estimate the average height of all adults and calculate a bound on the error of estimation assume that
suppose you just received a shipment of thirteen televisions. three of the televisions are defective. if two
in a report on high school graduation it was stated that 85 of high school students graduate. suppose 3 high school
Use the sales data given below determine: a) The least square trend line.
Compute a 95% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24 and 59. Change the number from 59 to 24 and recalculate the confidence interval.
assume that adults have iq scores that are normally distributed with a mean of u 100 and a standard deviation 20. find
She believes that the number of customers served on weekdays follows a normal distribution. Construct an 99% confidence interval of the average number of customers served on weekdays.
If there are 81 fraternity members, how much should they buy so that using the normal approximation they are 93.32% sure they will not run out?
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