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Q1) To evaluate average annual expenses of students on books and class materials sample size 36 is taken. Average is $850 and standard deviation is $54. A 99% confidence interval for he population mean is:
a) $823.72 to $876.28
b) $832.36 to $867.64
c) $826.82 to $873.18
d) $825 to $874.52
Q2) Random sample of 16 ATM transactions at Last National Bank of Flatrock revealed a mean transaction time of 2.8 minutes with standard deviation of 1.2 minutes. Width (in minutes) of 95% confidence interval for true transaction time is:
a) +or-0.639
b) +or-0.588
c) +or-0.300
d) +or-2.131
Q3) Study of effectiveness of two sea sickness prevention medicines of people who would normally experience sickness had following results in rough seas on a 3 hour cruise about SS Minniw:
Product A: 145 people out of 210 felt no sea sickness symptoms
Product B:135 people out of 180 felt no sea sickness symptoms
Test claim that there is no difference between effectiveness of product A and B using significance level of 0.1 Create distribution curve and show values
Ho : ................... P-value=....................
H? :......................... Test stat =.................
CV=.................(critical value)
A certain random experiment can result in one of four different possible outcomes, which we'll call A, B, C and D.
College Students' Seating Choices and Motivation to Achieve.This activity is a revision of an activity found in Real Data: A Statistics Workbook Based on Empirical Data by Z. C Holcomb (1997). Published by Pyrczak Publishing.
A study of 40 bowlers showed that there average score was 186 the standard deviation of the population is 6. Find the 95% confidence interval of the mean score for all bowlers.
Determine what analysis would you do on each problem (i.e., one-sample z-test, one-sample t-test, proportion test, two-sample independent t-test, or paired test)?
Compute the correlation and sample covariance. Compute the sample covariance and the sample correlation. Intuitively, what kind of correlation.
The average number of putts per hole for each player and their average driving distance is used to predict their total winnings using the multiple regression model where the deviations εI are assumed to be independent and Normally distributed with..
The probabilities of low, medium and high compliance are 0.3, 0.4, and 0.3, respectively
Assume if the students toss the coin 200 times each about 68% should have proportions among what two numbers.
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
Let independent variable x represent years since 1950. Determine quadratic regression model for per capita cigarette consumption.
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
An experiment is designed using three levels of ground clutter and two filter types. The experiment is performed by randomly selecting a treatment combination
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