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An air conditioning contractor has kept detailed records on the lifetimes of a random sample of...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of 250 compressors. She plans to use the sample mean lifetime, x, of those 250 compressors as her estimate or he population mea lifetime μ o al such compressors if the e meso this randon compressor avea standard deviation of 30 months, what is the probability that the contractor's estimate will be within 7 months of the true mean? The probability is (Round to four...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of 350 compressors. She plans to use the sample mean lifetime, x, of those 350 compressors as her estimate or he population mean lifetime μ. all such compressors he te meso this ran o compressor ave a standard deviation of 45 months, what is the probability that the contractor's estimate will be within 7 months of the true mean? The probability is (Round to four...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of 300 compressors. She plans to use the sample mean lifetime, x overbar, of those 300 compressors as her estimate for the population mean lifetime, mu, of all such compressors. If the lifetimes of this brand of compressor have a standard deviation of 50 months, what is the probability that the contractor's estimate will be within 5 months of the true mean?
The random variable X is the number of color television sets owned by a randomly selected...
The random variable X is the number of color television sets owned by a randomly selected household with an annual income between $15,000 and $29,999. Its probability distribution is shown below. Complete parts a through c. a. Find and interpret the mean of the random variable. Hx(Round to three decimal place as needed.) Interpret the mean. Choose the correct answer below 0 A. The observed value of the random variable will be equal to the mean of the random variable...
In the following probability distribution, the random variable x represents the number of activities a...
In the following probability distribution, the random variable x represents the number of activities a parent of a 6 th- to 8th-grade student is involved in. Complete parts (a) through (f) below.x01234P(x)0.3670.1330.2090.1160.175(a) Verify that this is a discrete probability distribution.This is a discrete probability distribution because the sum of the probabilities is _______ and each probability is _______ (b) Graph the discrete probability distribution. Choose the correct graph below.(c) Compute and interpret the mean of the random variable x .The mean...
In the following probability distribution, the random variable x represents the number of activities a parent...
In the following probability distribution, the random variable x represents the number of activities a parent of a K to 5 th-grade student is involved in. Complete parts (a) through (f) below.x01234P(x)0.1670.1940.3440.1780.117(a) Verify that this is a discrete probability distribution.This is a discrete probability distribution because the sum of the probabilities is _______ and each probability is _______ (b) Graph the discrete probability distribution. Choose the correct graph below.(c) Compute and interpret the mean of the random variable x .The mean...
1) A consumer advocacy group tested the "on-air" lifetimes of a random sample of 132 1)...
1) A consumer advocacy group tested the "on-air" lifetimes of a random sample of 132 1) cell phone batteries. The mean lifetime was 3.8 hours with a standard deviation of 0.4 hours. The lifetimes are approximately bell-shaped. Estimate the number of batteries with lifetimes between 3.0 hours and 4.6 hours. A) almost all (greater than 125) ) 90 D) 7 Z132-3.2
e student is involved in. Complete parts (a) through in below in the following probability distribution,...
e student is involved in. Complete parts (a) through in below in the following probability distribution, the random variable x represents the number of activities a parent of a th to th PIX) 0.057 0.288 0.213 0245 0.197 (c) Compute and interpret the mean of the random variable x. The mean is activities (Type an integer or a decimal. Do not round.) Which of the following interpretations of the mean is correct? OA The observed value of an experiment will...
Suppose the following data represent the ratings (on a scale from 1 to 5) for a...
Suppose the following data represent the ratings (on a scale from 1 to 5) for a certain smart phone game, with 1 representing a poor rating. Complete parts (a) through (d) below. Stars 1 2 3 4 5 Frequency 2363 2679 4222 3688 10,166 (a) Construct a discrete probability distribution for the random variable x. Stars (x) P(x) 1 2 3 4 5 (Round to three decimal places as needed.) (b) Graph the discrete probability distribution. Choose the correct graph...
please help with all. In the following probability distribution, the random variable x represents the number...
please help with all.
In the following probability distribution, the random variable x represents the number of activities a parent of a 6th-to 8th grade student is involved in. Complete parts (a) through (1) below. * 1 0 1 2 3 4 5 P(x) 0.269 0 206 0.224 0.239 0.062 (a) Verify that this is a discrete probability distribution This is a discrete probability distribution because the sum of the probabilities is and each probability is (6) Graph the discrete...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of 250 compressors. She plans to use the sample mean lifetime, x, of those 250 compressors as her estimate or he population mea lifetime μ o al such compressors if the e meso this randon compressor avea standard deviation of 30 months, what is the probability that the contractor's estimate will be within 7 months of the true mean? The probability is (Round to four...
An air conditioning contractor has kept detailed records on the lifetimes of a random sample of 350 compressors. She plans to use the sample mean lifetime, x, of those 350 compressors as her estimate or he population mean lifetime μ. all such compressors he te meso this ran o compressor ave a standard deviation of 45 months, what is the probability that the contractor's estimate will be within 7 months of the true mean? The probability is (Round to four...
The random variable X is the number of color television sets owned by a randomly selected household with an annual income between $15,000 and $29,999. Its probability distribution is shown below. Complete parts a through c. a. Find and interpret the mean of the random variable. Hx(Round to three decimal place as needed.) Interpret the mean. Choose the correct answer below 0 A. The observed value of the random variable will be equal to the mean of the random variable...
1) A consumer advocacy group tested the "on-air" lifetimes of a random sample of 132 1) cell phone batteries. The mean lifetime was 3.8 hours with a standard deviation of 0.4 hours. The lifetimes are approximately bell-shaped. Estimate the number of batteries with lifetimes between 3.0 hours and 4.6 hours. A) almost all (greater than 125) ) 90 D) 7 Z132-3.2
e student is involved in. Complete parts (a) through in below in the following probability distribution, the random variable x represents the number of activities a parent of a th to th PIX) 0.057 0.288 0.213 0245 0.197 (c) Compute and interpret the mean of the random variable x. The mean is activities (Type an integer or a decimal. Do not round.) Which of the following interpretations of the mean is correct? OA The observed value of an experiment will...
Suppose the following data represent the ratings (on a scale from 1 to 5) for a certain smart phone game, with 1 representing a poor rating. Complete parts (a) through (d) below. Stars 1 2 3 4 5 Frequency 2363 2679 4222 3688 10,166 (a) Construct a discrete probability distribution for the random variable x. Stars (x) P(x) 1 2 3 4 5 (Round to three decimal places as needed.) (b) Graph the discrete probability distribution. Choose the correct graph...
please help with all.
In the following probability distribution, the random variable x represents the number of activities a parent of a 6th-to 8th grade student is involved in. Complete parts (a) through (1) below. * 1 0 1 2 3 4 5 P(x) 0.269 0 206 0.224 0.239 0.062 (a) Verify that this is a discrete probability distribution This is a discrete probability distribution because the sum of the probabilities is and each probability is (6) Graph the discrete...
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