The grade point average of the students at UTC is 2.80 with a standard deviation of 0.84. The grade point average of students at UTK is 2.4 with a standard deviation of 0.84. Which university shows a more dispersed grade distribution?
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A mathematics teacher recorded the length of time, y minutes, taken to travel to school when leaving home x minutes after 7 am on seven selected…
A mathematics teacher recorded the length of time, y minutes, taken to travel to school when leaving home x minutes after 7 am on seven selected mornings. The results are as follows. x 0 10 20 30 40 50 60 y 16 27 28 39 49 48 51 a. plot the data on scatter diagram b. (i) calculate the equation of the least squares regression line of y on x, writing your answer in the form y = a + bc (ii) draw the regression line on your scatter diagram c. the mathematics teacher needs to arrive at school no […]
In an opinion poll, each individual in a random sample of 275 individuals from a large population is asked which political party he/she supports.
In an opinion poll, each individual in a random sample of 275 individuals from a large population is asked which political party he/she supports. If 45% of the population support party A, calculate (approximately) the probability that at least 116 of the sample support A.
early in 2007 consumer reports published the reuslts of an extensive investigation of broiler chickens purchased from food stores in 23 states.
early in 2007 consumer reports published the reuslts of an extensive investigation of broiler chickens purchased from food stores in 23 states. tests for bacteria in the meat showed that 81% of the chickens were contaminated with campylobacter, 15% with salmonella, and 13% with both. What’s the probability that a tested chicken was not contaminated with either kind of bacteria?
Calculating Binomial Probabilities First I need to Open a new Excel worksheet. Open spreadsheet 2. In cell A1 type success as the label 3….
Calculating Binomial Probabilities First I need to Open a new Excel worksheet. 1. Open spreadsheet 2. In cell A1 type “success” as the label 3. Under that in column A, type 0 through 10 (these will be in rows 2 through 12) 4. In cell B1, type “one fourth” 5. In cell B2, type “=BINOM.DIST(A2,10,0.25,FALSE)” [NOTE: if you have Excel 2007, then the formula is BINOMDIST without the period] 6. Then copy and paste this formula in cells B3 through B12 7. In cell C1, type “one half” 8. In cell C2, type “=BINOM.DIST(A2,10,0.5,FALSE)” 9. Copy and paste this formula in cells C3 through C12 10. In cell D1 type “three […]
