01/17/21

Determine the mean of the weight (in ounces) of the contents of the small gift box.

A candy manufacturer is marketing a small gift box containing one nut cluster bar and one piece of fudge. The manufacturing process for each candy is designed so that the mean weight of the nut... more

01/15/21

statistics multiple variations

Births are approximately Uniformly distributed between the 52 weeks of the year. They can be said to follow a Uniform distribution from 1 to 53 (a spread of 52 weeks). Round answers to 4 decimal... more

01/15/21

statistics question referecing minutes

The lengths of a professor's classes has a continuous uniform distribution between 49.2 min and 55.5 min. One class is randomly selected.If P(x > c) = 0.599 , find c.c =  minutes(Report answer... more

01/13/21

DBRHNLL8@yahoo.com

he method of tree ring dating gave the following years A.D. for an archaeological excavation site. Assume that the population of x values has an approximately normal... more

01/13/21

Question on Sample Proportion

In a large high school, 37% of the teachers believe that five minutes is not enough to time for students to change classes. However, 89% of students believe that five minutes is not... more

01/13/21

dbrhnll8@yahoo.com

From the distribution table, find the column heading for c = 0.950 and read down the column until you reach the entry in the row headed by d.f. = 25. The intersection of the column and row in the... more

12/17/20

Suppose the number of presents that Santa Clause leaves under Christmas trees is Poisson distributed with a mean of 4.7 presents per house.

Suppose the number of presents that Santa Clause leaves under Christmas trees is Poisson distributed with a mean of 4.7 presents per house.A) Find the probability that he leaves exactly five... more

06/03/20

response rate with a probability of 0.90 that the error estimation is less than 0.06?

Suppose one of the executives would like to estimate the response rate for another welcome screen format. How many web users should be selected for the survey if the executive wishes to estimate... more

06/03/20

Statistics And Probability

About 1% of the population has a particular genetic mutation. 900 people are randomly selected.Find the standard deviation for the number of people with the genetic mutation in such groups of... more

06/03/20

Statistics And Probability

63% of owned dogs in the United States are spayed or neutered. Round your answers to four decimal places. If 32 owned dogs are randomly selected, find the probability that a. Exactly 21 of them... more

04/21/20

question about probability

80% of the inhabitants of Finland are farmers, 2% - are teachers, the rest - other jobs. Find the probability that among the three random selected are:A - all farmers,B - 2 farmers and 1 teacher,C... more

Indicated probability

Suppose that 14% of people are left handed. If 8 people are selected at random, what is the probability that exactly 2 of them are left handed?

04/21/20

Two Population Means

At a recent faculty meeting, we were wondering if freshmen have more free time than seniors. We took a sample of 25 freshmen and 23 seniors. Each student was asked to record the amount of free time... more

04/20/20

statistics question

Fill in the missing values for this ANOVA summary table round to two decimal places:  S.S.d.f.M.S.F Between 2826.992 7 Within TOTAL 6438.992 49

04/01/20

Normal Probability

Let X represent the full height of a certain species of tree. Assume that X has a normal probability distribution with a mean of 87.4 ft and a standard deviation of 4.8 ft.A tree of this type grows... more

03/27/20

What is the z-score of x = 8, if it is 1.6 standard deviations to the left of the mean?

I need some help with this problem please.

03/27/20

Build times part 2

A study of the amount of time it takes to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 9.1 hours and the standard deviation is 1.8 hours. If 75 mechanics are... more

03/27/20

Study amount of time a mechanic to rebuild a transmission

A study of the amount of time it takes to rebuild the transmission for a 1992 Chevrolet Cavalier shows that the mean is 9.1 hours and the standard deviation is 1.8 hours. If 75 mechanics are... more

03/26/20

STAT Homework Help!

In a survey, 29 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $40 and standard deviation of$7. Find the margin of... more

03/26/20

Out of 400 people sampled, 132 had kids.

Out of 400 people sampled, 132 had kids. Based on this, construct a 90% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places

03/25/20

Standard deviations + P-value

For a normal distribution, find the probability that a measurement is: (a) more than two standard deviations above the mean (b) more than two standard deviations below the mean (c) more than 1.67... more

02/01/20

Suppose that an anxiety measure has a mean of 119 and variance of 324.00.

The researcher only wants to work with 79% of the upper participants. What is the smallest average score the researcher should consider with a sample size of 32?

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