Mathematics, 25.07.2021 01:40 nanagardiner08

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

Ellen just got a new supervisor. How can she establish good communication habits with her supervisor? a) Constantly check in with her supervisor b) Show her emotions freely c) Take notes during conversations Od) Ask her supervisor a lot of personal questions

Answer from: Quest

i do not know this sorry : (

Answer from: Quest

160

step-by-step explanation:

idk

i hope i

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 18:00, officialgraciela67

Which shows the correct lengths of side c in both scales? scale 1: 45 m; scale 2: 60 m scale 1: 60 m; scale 2: 45 m scale 1: 36 m; scale 2: 27 m scale 1: 27 m; scale 2: 36 m mark this and return save and exit

Answers: 3

continue

Mathematics, 21.06.2019 21:30, kimryan520

The ratios of boys to girls on a soccer league is 2: 5. if there are 28 boys, how many girls are playing soccer? extra points! will mark as brainiest asap

Answers: 2

continue

Mathematics, 21.06.2019 22:50, Yangster9305

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables

Answers: 3

continue

Mathematics, 21.06.2019 23:00, kobiemajak

Jim had 3,067.48 in his checking account he wrote a check to pay for two airplane tickets. his account now has 1,845.24.

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...