The average monthly mortgage payment for all homeowners in a city follows a normal distribution with...
- The average monthly mortgage payment for all homeowners in a city follows a normal distribution with a mean of $2850 and a standard deviation of $420. Find the probability that the monthly mortgage paid by a randomly selected homeowner from this city is:
- less than $2100
- more than $2600
- between $3200 and $3700
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The average monthly mortgage payment for all homeowners in a
city follows a normal distribution with...
The average ACT score follows a normal distribution with a mean of 21.1 and a standard...
The average ACT score follows a normal distribution with a mean of 21.1 and a standard deviation of 5.1 what is the probability that the mean IQ score of 50 randomly selected people will be more than 23 ?
The average price of a new iPhone is $800. Assume the price follows a normal distribution...
The average price of a new iPhone is $800. Assume the price follows a normal distribution with a standard deviation of $50. 1. What is the probability that a randomly selected iPhone sells for less than $750? 2. What is the probability that a randomly selected iPhone sells for more than $880? 3. What is the probability that a randomly selected iPhone sells between $770 and $840?
The mean monthly mortgage paid by all home owners in a city is 1230$ with a standard...
The mean monthly mortgage paid by all home owners in a city is 1230$ with a standard deviation of 130$ . Using Chebyshev's theorem, find the interval, {L,U} , that contains monthly mortgage payments of at least 60% of all homeowners. Round your answers to two decimal places. [ , ]
The household income of a large population city has a normal distribution with average of 68,000...
The household income of a large population city has a normal distribution with average of 68,000 and standard deviation of 12,000. A sample of 50 families is selected randomly. WHAT IS THE EXCEL FUNCTION USED? A) What is mean of the sample, variance of the sample, and standard deviation of the sample? b) Approximate the probability that the sample mean of the household income is greater than 80,000. [Requirement: Draw a bell shape graph and identify the mean, cut-off value,...
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $14
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $14. Find the probability that a randomly selected utility bill is (a) less than $65, (b) between $87 and $100, and (c) more than $110. (a) The probability that a randomly selected utility bill is less than $65 is _______ (Round to four decimal places as needed.) Use the normal distribution to the right to answer the questions. (a) What percent of the...
A random variable follows the normal probability distribution with a mean of 80 and a standard...
A random variable follows the normal probability distribution with a mean of 80 and a standard deviation of 20. Determine the probability for a randomly selected value from this population in parts a through d below. a. is less than 90 b. is less than 65 c. is more than 110 d. is more than 40.
The weight, in kg, of fish in a lake follows a normal distribution with mean 2...
The weight, in kg, of fish in a lake follows a normal distribution with mean 2 and standard deviation 0.5 a) What is the probability that a randomly selected fish weights less than lkg? b) Find the value, w, of the weight of a fish such that 95% of the fish weigh ess than w.
3. The heights of all adults in a large city have an approximately normal distribution with...
3. The heights of all adults in a large city have an approximately normal distribution with a mean of 68 inches and a standard deviation of 4 inches. a) Find the probability that a randomly chosen height is less than 66 inches. b) Write the sampling distribution of sample mean for any sample size. Find the probability that the mean height of a random sample of 100 adults would be between 67.5 inches and 69 inches.
The average time taken to complete an exam, X, follows a normal probability distribution with mean...
The average time taken to complete an exam, X, follows a normal probability distribution with mean = 60 minutes and standard deviation 30 minutes. What is the probability that a randomly chosen student will take more than 45 minutes to complete the exam?
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.)
The monthly utility bills in a city are normally distributed, with a mean of $100 and a standard deviation of $14. Find the probability that a randomly selected utility bill is (a) less than $65, (b) between $87 and $100, and (c) more than $110. (a) The probability that a randomly selected utility bill is less than $65 is _______ (Round to four decimal places as needed.) Use the normal distribution to the right to answer the questions. (a) What percent of the...
The weight, in kg, of fish in a lake follows a normal distribution with mean 2 and standard deviation 0.5 a) What is the probability that a randomly selected fish weights less than lkg? b) Find the value, w, of the weight of a fish such that 95% of the fish weigh ess than w.
3. The heights of all adults in a large city have an approximately normal distribution with a mean of 68 inches and a standard deviation of 4 inches. a) Find the probability that a randomly chosen height is less than 66 inches. b) Write the sampling distribution of sample mean for any sample size. Find the probability that the mean height of a random sample of 100 adults would be between 67.5 inches and 69 inches.
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.)
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