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Questions 6.34 points Save Answer The length X of shoelaces produced at a factory is normally...
4. In a factory, the length of a certain metal bar is normally distributed, and has...
4. In a factory, the length of a certain metal bar is normally distributed, and has a mean of 50 cm, and a standard deviation of 0.07 cm. Two bars are selected and the measurements are 50.05cm and 49.99 cm. To calculate the probability that the length falls between 50.05 and 49.99, we need to standardize the normal distribution by calculating the z- scores. What are the z-scores of the lengths of the two bars?
4. In a factory, the length of a certain metal bar is normally distributed, and has...
4. In a factory, the length of a certain metal bar is normally distributed, and has a mean of 50 cm, and a standard deviation of 0.07 cm. Two bars are selected and the measurements are 50.05cm and 49.99 cm. To calculate the probability that the length falls between 50.05 and 49.99, we need to standardize the normal distribution by calculating the z- scores. What are the z-scores of the lengths of the two bars?
5 points Save Answer A sample of 25 observations is selected from a normal population where...
5 points Save Answer A sample of 25 observations is selected from a normal population where the population standard deviation is 20. and the sample mean is 120 Calculate the Lower Limit of the 70% confidence interval of the population mean. Reminder: You only need to calculate the Lower Limit of the confidence interval. Moving to the next question prevents changes to this answer Activate Wind Gustion 2016
The lengths of nails produced in a factory are normally distributed with a mean of 4.84...
The lengths of nails produced in a factory are normally distributed with a mean of 4.84 centimeters and a standard deviation of 0.05 centimeters. Find the two lengths that separate the top 3% and the bottom 3%. These lengths could serve as limits used to identify which nails should be rejected. Round your answer to the nearest hundredth, if necessary.
> Moving to the next question prevents changes d el 1 points Save Ans Question 16...
> Moving to the next question prevents changes d el 1 points Save Ans Question 16 Use this information to answer this question: A Quality Analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is under control package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each:...
please answer all three questions. The monthly utility bills in a city are normally distributed, with...
please answer all three questions.
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $16. Find the probability that a randomly selected utility bill is (a) less than $66, (b) between $81 and $90, and (c) more than $100. (a) The probability that a randomly selected utility bill is less than $66 is (Round to four decimal places as needed.)
choose the right answer please Question Completion Status: Questions of 10 1 points Save Answer Moving...
choose the right answer please
Question Completion Status: Questions of 10 1 points Save Answer Moving to the next question prevents changes to this answer Questions Compared to spores, what advantage does a seed have? O a protection from drying out Ob using wind as a dispersal agent containing a nutrient store for a developing sporophyte Od providing nutrition for animals Moving to the next question prevents changes to this answer Question 5 of 10
QUESTION 2 1 points Save Ar The weights of steers in a herd are normally distributed...
QUESTION 2 1 points Save Ar The weights of steers in a herd are normally distributed with a mean of 900 pounds and a standard deviation of 120 pounds. What is the probability that the average weight for a sample of 40 steers from this herd will be within 25 pounds of the mean weight of all steers from this herd? (3 decimal places)
The Weights (lbs.) of items produced by a factory are Normally Distributed with mean 215 and...
The Weights (lbs.) of items produced by a factory are Normally Distributed with mean 215 and standard deviation 8. a) Compute the probability that an item randomly selected from the factory’s warehouse weighs: i) At least 225 lbs. ii) At most 225 lbs. iii) Between 200 and 210 lbs. b) Previous history suggests that 2% and 5% of the company’s products are overweight and underweight respectively. Calculate i) The minimum weight of an overweight item ii) The maximum weight of...
A manufacturer knows that their items have a normally distributed length, with a mean of 18...
A manufacturer knows that their items have a normally distributed length, with a mean of 18 inches, and standard deviation of 5.7 inches. If one item is chosen at random, what is the probability that it is less than 13 inches long? A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.7 years, and standard deviation of 0.7 years. If you randomly purchase one item, what is the probability it will last longer than...
4. In a factory, the length of a certain metal bar is normally distributed, and has a mean of 50 cm, and a standard deviation of 0.07 cm. Two bars are selected and the measurements are 50.05cm and 49.99 cm. To calculate the probability that the length falls between 50.05 and 49.99, we need to standardize the normal distribution by calculating the z- scores. What are the z-scores of the lengths of the two bars?
4. In a factory, the length of a certain metal bar is normally distributed, and has a mean of 50 cm, and a standard deviation of 0.07 cm. Two bars are selected and the measurements are 50.05cm and 49.99 cm. To calculate the probability that the length falls between 50.05 and 49.99, we need to standardize the normal distribution by calculating the z- scores. What are the z-scores of the lengths of the two bars?
5 points Save Answer A sample of 25 observations is selected from a normal population where the population standard deviation is 20. and the sample mean is 120 Calculate the Lower Limit of the 70% confidence interval of the population mean. Reminder: You only need to calculate the Lower Limit of the confidence interval. Moving to the next question prevents changes to this answer Activate Wind Gustion 2016
> Moving to the next question prevents changes d el 1 points Save Ans Question 16 Use this information to answer this question: A Quality Analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is under control package weight is normally distributed with a mean of twenty ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each:...
please answer all three questions.
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $16. Find the probability that a randomly selected utility bill is (a) less than $66, (b) between $81 and $90, and (c) more than $100. (a) The probability that a randomly selected utility bill is less than $66 is (Round to four decimal places as needed.)
choose the right answer please
Question Completion Status: Questions of 10 1 points Save Answer Moving to the next question prevents changes to this answer Questions Compared to spores, what advantage does a seed have? O a protection from drying out Ob using wind as a dispersal agent containing a nutrient store for a developing sporophyte Od providing nutrition for animals Moving to the next question prevents changes to this answer Question 5 of 10
QUESTION 2 1 points Save Ar The weights of steers in a herd are normally distributed with a mean of 900 pounds and a standard deviation of 120 pounds. What is the probability that the average weight for a sample of 40 steers from this herd will be within 25 pounds of the mean weight of all steers from this herd? (3 decimal places)
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