Mathematics, 05.10.2019 10:50, destinyranson

The average lifetime of a light bulb is 3,000 hours with a standard deviation of 696 hours. a simple random sample of 36 bulbs is taken.
a. what are the expected value, standard deviation, and shape of the sampling distribution of ?
b. what is the probability that the average life in the sample will be between 2,670.56 and 2,809.76 hours?
c. what is the probability that the average life in the sample will be greater than 3,219.24 hours?
d. what is the probability that the average life in the sample will be less than 3,180.96 hours?

Answers: 1

Show answers

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 16:00, crawfordricky84

Find the required measurements of the following trapezoids. a = 8 cm b = 16 cm h = 10 cm

Answers: 2

continue

Mathematics, 21.06.2019 16:20, jennyferluna0216

Refer to interactive solution 17.45 to review a method by which this problem can be solved. the fundamental frequencies of two air columns are the same. column a is open at both ends, while column b is open at only one end. the length of column a is 0.504 m. what is the length of column b?

Answers: 1

continue

Mathematics, 21.06.2019 19:30, jessnolonger

Zoey made 5 1/2 cups of trail mix for a camping trip. she wants to divide the trail mix into 3/4 cup servings. a. ten people are going on the trip. can zoey make enough 3/4 cup servings so that each person gets one serving? b. what size would the servings need to be for everyone to have a serving?

Answers: 1

continue

Mathematics, 21.06.2019 20:30, 20calzoy

Venita is sewing new curtains. the table below shows the relationship between the number of stitches in a row and the length ofthe row. sewingnumber of stitches length (cm)51 131532024306what is the relationship between the number of stitches and the length? othe number of stitches istimes the length. o. the number of stitches is 3 times the length.

Answers: 2

continue

Do you know the correct answer?

The average lifetime of a light bulb is 3,000 hours with a standard deviation of 696 hours. a simple...