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Determine the linear regression of weekly sales on aptitude test scores. Interpret the estimated slope of regression line.
There are 9 judges in Supreme Court. Suppose 3 are "conservative", 4 are "liberal", and 2 are "neutral". Each and every judge acts independently, and yet on a certain UP/DOWN issue it is known that
A university dean of students wishes to calculate approximately the average number of hours students spend doing home work per week. =6.2 hours from a previous study. How large a sample must be sele
An intellectual society, HIGHQ, claims that it grants membership only to people whose IQ is at least 2.5 standard deviations above average. Determine the best upper bound which can be attained by Ch
Ewey, Lie, and Howe is a regional branch office of tax preparation conglomerate Hookem, Billem, Cheatem, and Soakem. One week before the deadline for filing federal income tax returns, the systolic
Determine the mean and standard deviation of x, the number of days on which it rained, supposing that the forecaster is accurate? Do these data disagree with forecast of a"30% probability of rain"? D
An experiment was conducted to find out the strength of a certain kind of braided cord after weathering. The strengths of 56 pieces of cord which had been weathered for 30 days were investigated. Th
Test a new brand of coffee. 20 of coffee drinkers said they liked new brand, while 10 said they didn't. Do these data support the claim that more than half of all coffee drinkers like this new brand
A baseball player is asked to swing at the pitches in sets of four. The player swings at 100 sets of four pitches. The probability distribution for making a specific number of hits is given below. F
A random sampling of six credit card accounts gave the following information regarding payment due on each month on each card
Given sample size of 20 with sample mean of 630.6 and sample standard deviation of 90.1, we carry out the following hypothesis test:
Determine the probability that the third car arrives within three minutes of the first car? Of the cars arriving at the booth, it is known that over the long run 60% are Japanese imports. What is the
If the lot size is 3000, the sample size of 140, and probability of accepting the lot is 0.798. Determine the ATI for this quality level shipment?
Assume we have a population of scores with mean (?) of 975 and standard deviation (?) of 15. Suppose that the distribution is normal. Give answers to the following questions:
From the normal table, the percentages for classes are 2.28%, 13.59%, 34.13%, 34.13%, 13.59%, and 2.28%, respectively. Do the observed frequency data give significant reason to discredit the hypothe
An input capture event takes place at a count of 0x4DD2. If the next event takes place after 25 msec, what value is loaded? The e clock is 24 MHz and pre-scale value is 16.
Assume that about 20% of those called will find out an excuse (work, poor health, travel out of town, and so on.) to avoid jury duty. If 14 people are called for jury duty, determine the probability
The breaking strengths of random sample of 23 molded plastic housings were evaluated, and a sample mean of x = 479.42 and sample standard deviation of s = 12.55 were obtained. A confidence interval
Calculate the standard deviation for ages of British nurses in 1851 if the mean is 53.75. Suppose that the table below shows the age distribution of nurses in Great Britain in 1851. Round your answe
Illustrate a Type I and Type II error and provide an example of each which would have serious consequence. What should be done to reduce the consequences of a serious Type I error?
With n = 66 and sample mean of $3903 and known standard deviation of (sigma) = $801; Determine and describe a 95% confidence interval for population mean M.
Assume that you want to test the claim that the following paired date come from the population for which the mean difference is Md = 0. Do the complete hypothesis test and describe your decision.
500 of the voters are randomly chosen and asked whether they planned to vote for democratic incumbent or the Republican challenger. Of 500 surveyed, 400 said they would vote for Democratic incumbent
Truck tire life is normally distributed with the mean of 70,000 miles and standard deviation of 5,000 miles. Based on buying four tires from a manufacturer, determine the probability that a tire wil
If a men's basketball team shoots 70% on free throws. If we randomly pick a player to shoot 5 free throws, determine the total probability that he makes 2 OR less?