If the probability of engine malfunction during any one hour period is p = 0.02 and Y denotes the number of one hour intervals until the first malfunction, find the mean and standard deviation of Y. (Choose the answer correctly)
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- Situation 6Solve question 1 last part b where the question states... Probability that the total amount of time required to make an oil change in all cars from the sample of 100 cars is more than 3500 minutes is________QUESTION 5 Assume X is normally distributed with a mean of 14.8 and a standard deviation of 4.2. Determine the value for x that solves each of the following. Round the answers to 2 decimal places. a) P(X>x)=D0.05
- Question 17 A distribution of values is normal with a mean of 139.3 and a standard deviation of 37.8. Find Pgar which is the score separating the bottom 64% from the top 36%. 64 Pe4%3D Enter your answer as a number accurate to 1 decimal place. Answers obtained using exact z-score or z-scores rounded to 3 decimal places are accepted.Question 4 P(x) 0.25 0.1 2. 3 0.15 0.5 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal places > Next Question W re to searchQUESTION 3 Two classes A and B of 200 students each take the same examination, out of 100 points. The average grade for class A is 80 with a standard deviation of 10 point s. The average grade for class B is 75 with a standard deviation of 15 points. Assume that the grades in both classes are normally distributed. If the passing grade is 60, how many more students passed the examination in class A than in class B?
- Question 22Question 15 The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 36 and a standard deviation of 10. Suppose that one individual is randomly chosen. Let X = percent of fat calories. (a) Find the z-score corresponding to 28 percent of fat calories, rounded to 3 decimal places. (b) Find the probability that the percent of fat calories a person consumes is more than 28. (c) Shade the area corresponding to this probability in the graph below. (Hint: The x-axis is the z- score. Use your z-score from part (a), rounded to one decimal place). Shade: Left of a value Click and drag the arrows to adjust the values. -1 3 4. -1.6 (d) Find the maximum number for the lower quarter of percent of fat calories. Round your answer to 3 decimal places. (e) Sketch the graph and write the probability statement. BIUX, x' E ,=, 蛋 @ 深 园 Edit - Insert- Formats - A - ΣΣ Question Help: D Post to forum I Calculator Submit QuestionQuestion 14 The daily sales at a convenience store produce a distribution that is mean of 1240 and a standard deviation of 134. MacBo ormal distribution, the area to the right of z = 1.55, ro Question 13 The daily sales at a convenience store produce a distribution that is approximately normal with a mean of 1240 and a standard deviation of 134. History The probability that the sales on a given day at this store are between $1,200 and $1,300, rounded to four decimal places, is: Help
- Question 9 Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the z-score of a man 64.7 inches tall. (to 2 decimal places)QUESTION 4 Eight independent measurements were made along a line and the standard deviation was found to be 10.55. Determine the error at 99.7% probability. State you answer to two decimal places.Question 3 Marquis scored 82 in the class with the mean /5.5 and the standard deviation 5.4, but Rhianna scored 69 in the class with the mean 58.9 and the standard deviation 9.1. Who scored relatively better? (Round the answers to 2 decimal places) Marquis's z-score is Marquis's z-score is Select an answer Select an answer less than greater than the same as and Rhianna's z-score is Rhianna's z-score, we conclude that Select an answer Select an answer Rhianna did relatively better Marquis and Rhianna did relatively the same Marquis did relatively better Since