Under usual conditions a particular drug is known to have a pH that is normally distributed with mean 9 and variance 0.25. If pH of drug is either lower or upper 15% distribution, it is not acceptable.In a random sample of 36 different drugs, approximate the probability that more than 30 of them have acceptable pH level.
Under usual conditions a particular drug is known to have a pH that is normally distributed...
1) A manufacturer knows that their items have a normally distributed length, with a mean of 11.9 inches, and standard deviation of 1.4 inches. If 15 items are chosen at random, what is the probability that their mean length is less than 12.4 inches? 2) A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.2 years, and standard deviation of 0.8 years. If you randomly purchase 2 items, what is the probability that their...
A particular fruit's weights are normally distributed, with a mean of 497 grams and a standard deviation of 36 grams. If you pick 11 fruit at random, what is the probability that their mean weight will be between 480 grams and 481 grams (Give answer to 4 decimal places.)
5. A particular fruit's weights are normally distributed, with a mean of 704 grams and a standard deviation of 12 grams. If you pick 12 fruit at random, what is the probability that their mean weight will be between 692 grams and 701 grams (Give answer to 4 decimal places.) 6. A particular fruit's weights are normally distributed, with a mean of 286 grams and a standard deviation of 18 grams. If you pick 25 fruit at random, what is...
QUESTION 22 4 points S The lifetime of a particular type of battery is normally distributed with a mean of 1,100 days and a standard deviation of 80 days. The manufacturer randomly selects 400 batteries of this type and ships them to K-Mart. What is the probability the average lifetime of these 400 batteries is between 1,097 and 1,104 days? 4 points s QUESTION 23 Graduate students applying for entrance to many universities must take a Miller Analogies Test. It...
4. A manufacturer knows that their items have a normally distributed lifespan, with a mean of 14.4 years, and standard deviation of 3.2 years. If you randomly purchase 21 items, what is the probability that their mean life will be longer than 15 years? (Give answer to 4 decimal places.) 5. A particular fruit's weights are normally distributed, with a mean of 704 grams and a standard deviation of 12 grams. If you pick 12 fruit at random, what is...
Table of the most usual probability distribution functions of maintenance processes Create a table of the most usual probability mass functions (pmf) or probability distribution functions (pdf) (for discrete or continuous random variables) and their features that are mostly applied in Maintenance and Reliability. The columns should contain the following information: pmf or pdf, range of the variable, the cumulative distribution function (CDF), parameters, range of parameters, mean value, standard deviation or variance. Draw the table landscape The table is...
Question 3: a.) A manufacturer knows that their items have a normally distributed length, with a mean of 19.6 inches, and standard deviation of 2.4 inches. If 4 items are chosen at random, what is the probability that their mean length is less than 17.5 inches? b.) A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.5 years, and standard deviation of 0.7 years. If you randomly purchase 14 items, what is the probability...
2. Birth weights are normally distributed with a mean of 7.6 pounds and a standard deviation of 1.23 pounds. What is the probability that a newborn weighs more than 11.3 pounds? Ans 2 3. X is binomial with n = 700 and p = .32. Use the standard normal distribution to approximate P(207 < X < 256). Ans 3 4. A population has a known variance of 22.9. If you draw random samples of size 24 and construct the sampling...
8.The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 39 liters, and standard deviation of 5.6 liters. What is the probability that daily production is between 30.9 and 46.1 liters? (Round your answer to 4 decimal places.) 9.A particular fruit's weights are normally distributed, with a mean of 788 grams and a standard deviation of 36 grams. If you pick one fruit at random, what is the probability that it...
It is known that the height of ten‐year old boys is normally distributed with a population standard deviation of 4.24 cm. If a random sample of 64 ten‐year old boys are considered what is the probability that the average height of this sample of ten‐year old boys will differ by no more than 1.15 cm in either direction from the unknown population mean height of ten‐year old boys?