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Forty-eight measurements are recorded to several decimal places. Each of these 48 numbers is rounded off to the nearest integer. The sum of the original 48 numbers is approximated by the sum of these integers. If we assume that the errors made by rounding off are iid and have a uniform distribution over the interval ( - ~, ~), compute approximately the probability that the sum of the integers is within two units of the true sum.
Looking at the data, the manufacturer is incorrect in its label claim. Perform hypothesis testing to prove or disprove it. Is the manufacturer correct in its label claim? Explain.
The distribution of lifetimes for a certain type of light bulb is normally distributed with a mean of 1000 hours and a standard deviation of 100 hours. Find the 33rd percentile of the distribution of lifetimes.
Write down the probability of that the median of the sample or average medians is greater or more than 320 minutes?
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
95% confidence interval evaluate for proportion of Americans who believe Abraham Lincoln is United States' most outstanding President is 65% to 75%. If more precise estimate is requested, then confidence level.
At.01 significance level is it sensible to conclude that modification decreased the number of traffic accidents?
Using data table given below, find out the range and median?
Describe your answer to a person who has never had a course in statistics.
Run a multiple regression and interpret all the findings, R 2 , F, IV coefficients, and the intercept. Then in paragraph format, identify and report the following:
Find a 90% confidence interval for the mean decibel level µ for this type of transit vehicle.
Identify the sampling distribution to be used: the standard normal distribution or the Student's t distribution. Find the critical value(s).
The student with the 92 found a grading error on her exam and her correct grade was 95. There were no other grading errors. After correcting this student's paper, the five number summary for the midterm exam will be
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