# Savannah

### Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 138 millimeters, and a ?

Thompson and Thompson is a steel bolts manufacturing company. Their current steel bolts have a mean diameter of 138 millimeters, and a standard deviation of 5 millimeters.

If a random sample of 41 steel bolts is selected, what is the probability that the sample mean would be less than 137.3 millimeters? Round your answer to four decimal places.

1 AnswerMathematics2 months ago### Suppose a large shipment of laser printers contained 18% defectives. If a sample of size 340 is selected?

Suppose a large shipment of laser printers contained 18% defectives.

If a sample of size 340 is selected, what is the probability that the sample proportion will be greater than 13%? Round your answer to four decimal places.

2 AnswersMathematics2 months ago### A study on the latest fad diet claimed that the amounts of weight lost by all people on this diet had a mean of 20.7 pounds ?

A study on the latest fad diet claimed that the amounts of weight lost by all people on this diet had a mean of 20.7 pounds and a standard deviation of 4.1 pounds.

Step 1 of 2 : If a sampling distribution is created using samples of the amounts of weight lost by 90 people on this diet, what would be the mean of the sampling distribution of sample means? Round to two decimal places, if necessary.

1 AnswerMathematics2 months ago### PLZ Help! I am confused. The mean monthly car payment for 123 residents of the local apartment complex is $624. ?

The mean monthly car payment for 123 residents of the local apartment complex is

$624. What is the best point estimate for the mean monthly car payment for all residents of the local apartment complex?

Mathematics2 months ago### Hello, Can anyone please explain how to find the critical value? ?

Hello, Can anyone please explain how to find the critical value? For example z0.01= 1.28, how do you find the 1.28? The water works commission needs to know the mean household usage of water by the residents of a small town in gallons per day. They would like the estimate to have a maximum error of 0.13 gallons. A previous study found that for an average family the standard deviation is 1.3 gallons and the mean is 18.5 gallons per day. If they are using a 98% level of confidence, how large of a sample is required to estimate the mean usage of water? Round your answer up to the next integer.

1 AnswerMathematics2 months ago### Please Help! The mean life of a television set is 96 months with a variance of 225. ?

The mean life of a television set is 96 months with a variance of 225.

If a sample of 76 televisions is randomly selected, what is the probability that the sample mean would be greater than 94.7 months? Round your answer to four decimal places.

2 AnswersMathematics2 months ago### Urgent, Help! The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is 4178 miles ?

The head of maintenance at XYZ Rent-A-Car believes that the mean number of miles between services is 4178 miles, with a variance of 124,609.

If he is correct, what is the probability that the mean of a sample of

40 cars would be less than 4265

miles? Round your answer to four decimal places.

1 AnswerMathematics2 months ago### Please Help! The operation manager at a tire manufacturing company believes that the mean mileage of a tire is 44,111 miles?

The operation manager at a tire manufacturing company believes that the mean mileage of a tire is 44,111 miles, with a variance of 5,943,844. What is the probability that the sample mean would be less than 44,257 miles in a sample of 80 tires if the manager is correct? Round your answer to four decimal places.

2 AnswersMathematics2 months ago### Please help!A production manager at a wall clock company wants to test their new wall clocks.The designer claims they have a mean life of 14?

A production manager at a wall clock company wants to test their new wall clocks. The designer claims they have a mean life of 14 years with a variance of 25.

If the claim is true, in a sample of 50 wall clocks, what is the probability that the mean clock life would be greater than 12.5 years? Round your answer to four decimal places.

1 AnswerHomework Help2 months ago### Please help. The cost of 5 gallons of ice cream has a variance of 64 with a mean of 34 dollars during the summer. ?

The cost of 5 gallons of ice cream has a variance of 64 with a mean of 34 dollars during the summer.

What is the probability that the sample mean would differ from the true mean by more than 1.1 dollars if a sample of 38 5-gallon pails is randomly selected? Round your answer to four decimal places.

1 AnswerMathematics2 months ago### PLZ HELP! Determine whether or not to give in procedure result in a binomial distribution. ?

surveying 40 people to determine which brand of soft drink is their favorite.

Yes no no

3 AnswersMathematics2 months ago### Suppose that diameters of a new species of Apple have a bell shaped distribution with a mean of 7.25cm. And a standard deviation of 0.42?

What percentage of the apples have diameters that are less than 6.41cm

1 AnswerMathematics2 months ago### Hello, please help. I am confused. A psychology professor assigns letter grades on a test according to the following scheme.?

A psychology professor assigns letter grades on a test according to the following scheme.

A: Top 8% of scores

B: Scores below the top 8% and above the bottom 61%

C: Scores below the top 39% and above the bottom 16%

D: Scores below the top 84% and above the bottom 8%

F: Bottom 8% of scores

Scores on the test are normally distributed with a mean of 65.4 and a standard deviation of 9.7 Find the numerical limits for a D grade. Round your answers to the nearest whole number, if necessary.

1 AnswerMathematics2 months ago### Hello, please help. A psychology professor assigns letter grades on a test according to the following scheme. ?

A psychology professor assigns letter grades on a test according to the following scheme.

A: Top 11% of scores

B: Scores below the top 11% and above the bottom 55%

C: Scores below the top 45% and above the bottom 20%

D: Scores below the top 80% and above the bottom 9%

F: Bottom 9% of scores

Scores on the test are normally distributed with a mean of 71.9 and a standard deviation of 8.4

Find the minimum score required for an A grade. Round your answer to the nearest whole number, if necessary.

1 AnswerMathematics3 months ago### Hello, please help. A humanities professor assigns letter grades on a test according to the following scheme. ?

A humanities professor assigns letter grades on a test according to the following scheme.

A: Top 6% of scores

B: Scores below the top 6% and above the bottom 64%

C: Scores below the top 36% and above the bottom 17%

D: Scores below the top 83% and above the bottom 8%

F: Bottom 8% of scores

Scores on the test are normally distributed with a mean of 76.9 and a standard deviation of 9.5. Find the numerical limits for a C grade. Round your answers to the nearest whole number, if necessary.

1 AnswerMathematics3 months ago### Please help? I don’t understand the graphs. 10 points will be awarded ?

5 AnswersMathematics5 months ago