Math

ProbabilityQ&A LibraryBob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 1.90 gallons. From his records, he selects a random sample of 45 sales and finds the mean number of gallons sold is 5.70. a. What is the point estimate of the population mean? (Round your answer to 2 decimal places.) Point estimate b. Determine a 90% confidence interval for the population mean. (Use z Distribution Table.) (Round your answers to 2 decimal places.) Confidence interval andQuestion

Bob Nale is the owner of Nale’s Quick Fill. Bob would like to estimate the mean number of gallons of gasoline sold to his customers. Assume the number of gallons sold follows the normal distribution with a population standard deviation of 1.90 gallons. From his records, he selects a random sample of 45 sales and finds the mean number of gallons sold is 5.70.

a. |
What is the point estimate of the population mean? |

Point estimate |

b. |
Determine a 90% confidence interval for the population mean. (Use z Distribution Table.) |

Confidence interval | and |

Tagged in

Find answers to questions asked by students like you.

Q: General: Deck of Cards: You draw two cards from a standard deck of 52 cards without replacing the fi...

A: No, the outcomes on the two cards are not independent because the probability of the second card doe...

Q: The annual income of residence in certain county is normally distributed with a mean of $42,000 and ...

A: The probability that a randomly chosen resident has income over $52,000 is 16% and it is calculated ...

Q: At a certain discount store the number of people in checkout lines varies. the probability model fo...

A: (a) We need to fill in the blank in the table to complete the table as a probability model. ...

Q: A coin is tossed 500 times and comes up heads 255 times. Use the Empirical Method to approximate the...

A: Empirical Probability Formula:

Q: 4. A machine works for an exponentially distributed time with rate u and then fails. A repair crew c...

A: As per the questionLet T be the time between two successive replacementsIt is given by the sum of li...

Q: The scores of students on a standardized test form a normal distribution with a mean of 300 and a st...

A: It is given that middle 50% of the data falls within 0.67 standard deviations from mean.That is, 50%...

Q: Suppose you choose at random a real number X from the interval [2, 10]. (a) Find the density functio...

A: First find density function f(x) Let X follows Uniform distribution

Q: 1. Arrivals of goods at a plant occur at a rate of 5 per hour and research suggests that a Poisson p...

A: Poisson Distribution Formula:

Q: Show that: (a) Cov(X,Y) = E[XY] – E[X]E[Y]. (b) If X and Y are independent, then fY|X(y|x) = fY(y)

A: Solution:a.Show that COV(X,Y)=E(XY)–E(X)E(Y)