Describing z-score within standard deviations of mean

Assignment Help Basic Statistics

Reference no: EM1319630

Q1) Life span of battery is normally distributed; with mean of 2400 hours and standard deviation of 40 hours .What percent of batteries have life span that is more than 2470 hours? Would it be unusual for a battery to have a life span which is more than 2470 hours? Describe your reasoning

What percent of batteries have a life span that is more than 2470 hours

Approximately ......% of batteries have a life span which is more than 2470 hours

Would it be unusual for a battery thave a life span that is more than 2470 hours? Describe your reasoning

a) It is unusual for battery to have a life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.

b) It is unusual for battery to have a life span that is more than 2470 hours as the z-score is not within 2 standard deviations of mean.

c) It is not unusual for battery to have life span that is more than 2470 hours as the z-score is not within 2 standard deviations of mean.

d) It is not unusual for a battery to have life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.

Reference no: EM1319630

Questions Cloud

Xbar distribution of sample means : If random sample of size n = 16 are selected, can we say anything about the xbar distribution of sample means?

Standardized test is randomly selected for probability : A student with a 3.5 to 4 grade point average who took standardized test is randomly selected. Determine the probability that students test score is less than 36.

Objective questions on regression : Objective questions on regression

Probability distribution of x : What can we say about the probability distribution of x? Is it approximately normal? What are the mean and standard deviation?

Describing z-score within standard deviations of mean : It is not unusual for a battery to have life span that is more than 2470 hours as the z-score is within 2 standard deviations of mean.

Probability in book seller : USA Today reported that 11% of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day, what is the probability that

Multiple choice questions on regression : Multiple choice questions on regression.

Explaining independent variable-covariate and levels : Explain the independent variable, covariate, and levels (groups) of eah. Also, explain the dependent variable and its associated measurement scale and expected outcome.

Probability in case of style of pottery : Santa Fe black on white is a style of pottery that occurs in about 61% of the pot shards found in the Bandelier National Monument area.

User Account

All Pages