Statistics question and answers for October 25, 2023
- Q A spectrophotometer used for measuring CO concentration ppm parts per million by volume is checked for accuracy by taking readings on a manufactured gas called span gas in which the...
- Q Newly purchased tires of a particular type are supposed to be filled to a pressure of 30 psi Let denote the true average pressure A test is to be carried...
- Q C The desired percentage of SiO2 in a certain type of aluminous cement is 5 5 To test whether the true average percentage is 5 5 for a particular production...
- Q Harry has a 1 year ARM for 75 000 over a 25 year term The margin is 2 and the index rate starts out at 2 5 and increases to...
- Q Consider the following distribution 1 20 rating n 4821 0 062 0 25 0 01 0 562 0 81 4 15 0 Imagine an experiment where we will randomly draw...
- Q Suppose we have 378 observations in our data and for each we have recorded two numeric attributes x and y Sample average of x is 1000 Sample average of y...
- Q Again suppose our sample covariance sxy is 175 then the following scatterplot y vs x y 90 85 95 105 115 400 200 200 400 Could not represent our data...
- Q Again suppose our sample covariance Sxy is 2500 then the following scatterplot y vs x y 008 006 1100 1300 200 0 200 400 X None of these selections apply...
- Q Match the survey descriptions on the left with the correct type of bias on the right Types of Bias Every 5th student entering the cafeteria is asked to complete a...
- Q 9 a b minimum 0 11 12 13 Determine the following values 15 2 4 on the life span of his pet cats 15 15 16 16 17 18 18...
- Q Match the sampling method on the left with the correct example on the right Examples simple random sample systematic sample stratified sample A B C voluntary response sample D convenience...
- Q 1 Match the term on the left with the correct definition on the right Population Sample Statistical Bias Mean Median Mode Standard Deviation Z score Definitions A B C D...
- Q Page 3 of 4 154 175 166 138 161 171 165 188 Bob measured the heights of all his cousins The heights are rounded to the nearest centimetre 139 137...
- Q 6 8 Here is a sample of data Determine the standard deviation Show your work no spreadsheet 7 5
- Q a b re is a sample of data 6 8 Determine the mean Show your work no spreadsheet 7 Determine the median Show your work no spreadsheet 5
- Q Give the contrapositive and converse of each of the statements in Exercises 47 54 phrasing your answers in words 1 These birds flock together only if they are of a...
- Q In a study of government financial aid for college students it becomes necessary to estimate the percentage of full time college students who earn a bachelor s degree in four...
- Q on appears to be normally distributed is appropriate for a 98 confidence level where n 7 6 27 and the A ta 2 1 96 Z 2 2 33 OC...
- Q ghts of college football players are normally distributed with a mean of 200 pounds and a standa deviation of 50 pounds If a college football player is randomly selected find...
- Q Find the standard deviation o for the binomial distribution which has n 48 and p 3 Round your answer t the nearest hundredth A 6 66 OB 3 39 OC...
- Q How many students must be randomly selected to estimate the mean weekly eamings of students at one college We want 95 confidence that the sample mean is within 4 of...
- Q ge survey 22 of all students work full time Find the mean for the number of students who work full time in samples of size 16 Round to the nearest...
- Q Use regression to find a quartic model for the given data set Round the regression parameters to three decimal places 7 8 10 1 3 7 y X y 1...
- Q the amount of time it takes a mechanic to rebuild the transmission for a 2010 Chevrolet Colora shows that the mean is 8 4 hours and the standard deviation is...
- Q 81 on a test are normally distributed with a mean of 63 2 and a standard deviation of 11 7 Find P separates the bottom 81 from the top 19...
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