# MATH 221 Quiz Week 5 Recent

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**Quiz Week 5 Recent**

The table below shows the results of a survey in which 141 men and 145 women…

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## Quiz Week 5 Recent

Quiz Week 5 Recent

**A+ Formulas in Excel and in Word are Included**

- The table below shows the results of a survey in which 141 men and 145 women workers ages 25-64 were asked if they have at least one month’s income set aside for emergencies. complete parts (a) – (d)

A =

B =

C =

D =

**2**.

Mean = 2.44

Variance = 1.8864

Standard deviation = 1.3735

Expected value =

**3**. A doctor gives a patient a 60% chance of surviving bypass surgery after a heart attack. If the patient survives the surgery, then the patient has a 20% chance that the heart damage will heal. Find the probability that the patient survives the surgery and the heart damage heals.- Perform the indicated calculation.

**5** A standard deck of cards contains 52 cards. One card is selected from the deck.

**6**. Determine the required value of the missing probability to make the distribution a discrete probability distribution.

P(4)=

**7**. Determine whether the events E and F are independent or dependent. Justify your answer.

- E & F are dependent because being prone to road rage can affect the probability of a person having an at-fault accident.

B. E cannot affect F and vice versa because the people were randomly selected, so all events are independent.

C. The war in major oil exporting country could affect the price of gasoline, so E and F are dependent. **8**. During a 52-week period, a company paid overtime wages for 17 weeks and hired temporary help for

77 weeks. During 55 weeks, the company paid overtime *and* hired temporary help. Complete parts (a) and (b) below.

A=

Overtime=

**9**. About 40% of babies born with a certain ailment recover fully. A hospital is caring for six babies born with this ailment. The random variable represents the number of babies that recover fully. Decide whether the experiment is a binomial experiment. If it is, identify a success, specify the values of n, p, and q, and list the possible values of the random variable x.

Is the experiment a bionomial experiment?

What is a success in this experiment?

Specify the value of n. Select the correct choice below and fill in any answer boxes in your choice.

Specify the value of p. Select the correct choice below and fill in any answer boxes in your choice.

Specify the value of q. Select the correct choice below and fill in any answer boxes in your choice.

The probability that the highest level of education for an employee chosen at random is B is…

- A probability experiment consists of rolling a fair 18-sided die. Find the probability of the event below. rolling a number divisible by 6.

The probability is…

**12**. Suppose Jim is going to burn a compact disk (CD) that will contain 88 In how many ways can Jim arrange the 88 songs on the CD?**13**. Use the frequency distribution, which shows the number of American voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range.

The probability that a voter chosen at random is in the 18 to 20 years old age range is…

**14**. Find the indicated probabilities using the geometric distribution, the Poisson distribution, or the binomial distribution. Then determine if the events are unusual. If convenient, use the appropriate probability table or technology to find the probabilities.

Assume the probability that you will make a sale on any given telephone call is 0.250.25.

Find the probability that you (a) make your first sale on the fifth call, (b) make your sale on the first, second, or third call, and (c) do not make a sale on the first three calls.

- P(make your first sale on the fifth call)=
- P(make your sale on the first, second, or third call)=
- P(do not make a sale on the first three calls)=
- =

** 15**. Determine whether the random variable is discrete or continuous.

- The number of free dash throw attempts before the first shot is made number of free throw attempts before the first shot is made.The number of people with blood type Upper A in a random sample of 47 peoplenumber of people with blood type A in a random sample of 47 people.The amount of rain in City Upper B during April amount of rain in City B during April.The number of bald eagles in the country number of bald eagles in the country.The weight of a Upper T dash bone steak weight of a T-bone steak.Is the number of free-throw attempts before the first shot is made discrete or continuous?
Is the number of people with blood type A in a random sample of 47 people discrete or continuous?

Is the amount of rain in City B during April discrete or continuous?

Is the number of bald eagles in the country discrete or continuous?

Is the weight of a T-bone steak discrete or continuous?

**16**. Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p.

n equals 90n=90,

p equals 0.3

Mean =

Variance =

Standard deviation=

**17**. 38 % of college students say they use credit cards because of the rewards program. You randomly select 10 college students and ask each to name the reason he or she uses credit cards. Find the probability that the number of college students who say they use credit cards because of the rewards program is (a) exactly two, (b) more than two, and (c) between two and five inclusive. If convenient, use technology to find the probabilities.P(2)=P(x>2)=P(2__>__x__<__5)=**18**. Use technology to (a) construct and graph a probability distribution and (b) describe its shape.

The number of computers per household in a small town

a. Construct the probability distribution per household in a small town

b. Describe the distribution’s shape. Choose the correct answer below.

Skewed left

Symmetric

Skewed right

Quiz Week 5 Recent

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