### What is the probability that a single service call takes

Assignment Help Basic Statistics
##### Reference no: EM13861537

A company services home air conditioners. It is known that times for service calls follow a normal distribution with a mean of 60 minutes and a standard deviation of 10 minutes.

a. What is the probability that a single service call takes more than 65 minutes?

b. What is the probability that a single service call takes between 50 and 70 minutes?

c. The probability is 0.025 that a single service call takes more than how many minutes?

d. Find the shortest range of times that includes 50% of all service calls.

e. A random sample of four service calls is taken. What is the probability that exactly two of them take more than 65 minutes?

### Previous Q& A

#### Conspicuous consumption refers

Conspicuous consumption refers to:

#### Identify the burnham or sullivan inspired elements

Identify the Burnham or Sullivan inspired elements of what you are writing about. What are some of the details that we've talked about in class that you see while we are out in the field

#### Is free trade always good policy

Is free trade always a good policy? Using Paul krugman's "is free trade passé?" And bhagwati's paper on labor and environmental standards, comment on the status of US free trade policy. Make sure to add your opinion on NAFTA. In what ways can nafta h..

#### Most important source of local tax revenue is income tax

About one out of every ten dollars of federal government spending goes toward interest on the national debt. Over one out of every three dollars of federal tax revenue comes from social insurance receipts. The most important source of local tax reven..

#### Does this event increase or decrease demand-supply

Does this event increase or decrease demand and/or supply? How does this change in demand and/or supply affect the equilibrium prices and quantity in the market? In other words, do they increase or decrease? Find the new equilibrium and compare it wi..

#### Find equation for indifference curve through bundle

Suppose Alan’s preferences are described by the utility function: Find Alan’s MRS. Find the equation for Alan’s indifference curve through the bundle (3, 6).

#### Determine the premium of the european call option mentioned

A European call option allows one to purchase 2 shares of stock B with 1 sare of stock A at the end of a year. A European put option which allows one to sell 2 shares of stock B for 1 share of stock A costs 11.5. Determine the premium of the European..

#### Continuously compounded risk-free interest rate

A stock is projected to pay a dividend of \$3 in 1 month. A three month at-the-money European put option on the stock has a premium that is \$2.751 higher than the premium for a three-month-at-the-money European call option on the stock. The continuous..

#### What is the inter pretation of the slope

In a two year setting Rod has earnings of \$ 8 000 this year and earnings of \$ 25, 0 00 next year. He can borrow or lend at an interest rate of 25%. Draw his budget line including endpoints. What is the slope of the budget line? What is the inter pret..

#### Contemplating to implement actions to prevent climate change

The government is contemplating to implement actions to prevent climate change. If no action is taken then climate change will happen with a probability of 20%. There is a probability of 100-20 that there will be no climate change. We will not be abl..

### Similar Q& A

#### Single point estimates for things they need measured

Many people do not "like" or "trust" single point estimates for things they need measured.

#### Additional types of quantitative research recommendation

Address additional types of quantitative research recommendation to enhance the validity and reliability of the research findings.

#### Question on statistics-binomial probabilities

Trevor is interested in purchasing the local hardware/sporting goods in the small town of Dove creek, Montana. After examing accounting records for the past several years

#### Mean age of uninsured senior citizens

Healthcare issues are receiving much attention in both academic and political arenas. Compute the arithmetic mean age of the uninsured senior citizens to the nearest hundredth of a year.

#### What is the difference between standard normal distribution

what is the difference between standard normal distribution and t-distribution?could anyone help me this

#### Confidence interval for the mean monthly rent

Find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community.

#### Explain what is probability of between success

Probabilities can be approximated by the normal probability distribution? Explain What is the probability of between 100 and 110 successes? What is the probability of 130 or more succeses?

#### A graduate course has 3 biology students and 4 chemistry

a graduate course has 3 biology students and 4 chemistry students. a sample of 2 students is randomly selected from

#### Wasserman and wadsworth 1989 discuss a process for the

wasserman and wadsworth 1989 discuss a process for the manufacture of steel bolts that continuously feed an assembly

#### 1a national poll of 600 men announced that the proportion

1.a national poll of 600 men announced that the proportion in the survey who claimed to help their wives at home was

#### Hypothesis test and report a 2-tailed p value

Suppose two residents participate in the program (each for 3 weeks= 21 days) and cart review inds a total of 20 medical erros made by the two residents combined. Rate = 20 errors in 21 days per 2 residents .95 error per day per 2 resdients or .4762..

#### Why would a company maintain separate accounts receivable

why would a company maintain separate accounts receivable ledgers for each customer as opposed to maintaining a single