Mathematics, 25.07.2021 01:40 Wethepeeps6048

Question 2 The battery standby duration (in hours) of a new model of cell phone is known to be normally distributed. Ten pieces of such new model of cell phone supplied from the manufacturer are randomly chosen and the actual standby durations are recorded as below:

48.2 47.8 45.6 47.2 49.3

51.2 44.2 45.4 49.2 43.6

(a) Calculate the unbiased estimates of population mean and standard deviation of battery standby duration (in hours) of the new cell phone.

(b) The manufacturer claimed that this new model of cell phone has the mean battery standby duration of longer than 46.5 hours. Test at 1% significance level if this claim is true.

Answers

Denise needs to remind all 557 patients that the doctor's office won't be open on Fridays during the summer months. What's the most appropriate way to communicate this information to her patients ?

Answer from: Quest

but which class are u may know that first

20 pts and will mark brainliest! // graphing absolute value functions drag the tiles to the correct

Answer from: Quest

the battle of gettysburg is considered the "high water mark" of the confederacy because it marked the greatest advance of the confederate forces against the union.

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 22:00, BeautyxQueen

What is the length of the segment, endpoints of which are intersections of parabolas y=x^2− 11/4 x− 7/4 and y=− 7 /8 x^2+x+ 31/8 ?

Answers: 1

continue

Mathematics, 21.06.2019 23:30, brid695

Tatiana wants to give friendship bracelets to her 32 classmates. she already has 5 bracelets, and she can buy more bracelets in packages of 4. write an inequality to determine the number of packages, p, tatiana could buy to have enough bracelets.

Answers: 1

continue

Mathematics, 22.06.2019 03:30, lelseymota123

Acollection of nickels and quarters is worth $2.85. there are 3 more nickels than quarters. how many nickels and quarters are there?

Answers: 3

continue

Mathematics, 22.06.2019 04:30, thanerose

Amath test has a total of 20 problems some problems are worth two points and some are worth three points the whole test is worth 452 points how many three-point problems were there

Answers: 1

continue

You know the right answer?

Question 2 The battery standby duration (in hours) of a new model of cell phone is known to be norm...