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All Topics - Statistics Questions asked by Filo students

Question 1

A company has both male and female employees. The company has shirts and jackets with the company logo to give away to employees. For each of the company's 221 employees, a manager asked which plece of clothing the employee prefers. The preferences, based on gender, are summarized in the table below. Suppose an employee of the company is chosen at random. Answer each part. Do not round intermediate computations, and round your answers to the nearest hundredth. (a) What is the probability that the employee is female? (b) What is the probability that the employee is female or prefers a shirt?

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Question 2

Here is a Venn diagram showing the sets

A, B

, and

C

, as well as the universal set

U

. Find the set below. Write your answer in roster form or as

\emptyset

(C \cap B) \cup A^{'} = [[

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Question 3

Three research departments have 9,8 , and 7 members, respectively. Each department is to select a delegate and an alternate to represent the department at a conference. In how many ways can this be done?

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Question 4

Government agencies keep data about the income distribution of the population. The Kelly family and Griffin family live in a county with 5000 families. The Kelly family's income is at the

7 1^{st}

percentile. The Griffin family's income is at the

7 9^{th}

percentile. (a) Which of the following must be true about the Kelly family's and the Griffin family's incomes? The Kelly family earns more than the Griffin family. Both the Kelly family and the Griffin family earn more than the median income. The Griffin family earns \ 8000$ more than the Kelly family. The Kelly family and the Griffin family both have incomes in the bottom half of incomes in their county. (b) Which of the following must be true about the Kelly family's income? The Kelly family earns less than about

71%

of families in their county. The Kelly family earns about

71%

of the highest income in their county. The Kelly family earns more than about

71%

of families in their county. The Kelly family earns about

29%

of the highest income in their county.

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Question 5

Last year over 10,000 students took an entrance exam at a certain state university. Miguel's score was at the

3 2^{nd}

percentile. Mai's score was at the

6 6^{th}

percentile. (a) Which of the following must be true about Miguel's score? Miguel scored higher than about

68%

of the students who took the exam. About

68%

of the students who took the exam scored higher than Miguel. Miguel got about

32%

of the questions correct. Miguel got about

32%

of the questions wrong. (b) Which of the following must be true about Miguel's and Mai's scores? Mai scored higher than Miguel. Both Miguel and Mai scored higher than the median. Mai got 34 more questions correct than Miguel. Miguel's and Mai's scores were both in the bottom half of all scores.

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Question 6

The tourist bureau of the Hawailan Islands surveyed a sample of 5 United States tourists as they left to return home. The tourists were asked how many days they spent on their visits. Their responses were as follows.

6, 11, 9, 10, 9

Send data to calculator Find the standard deviation of this sample of numbers. Round your answer to two decimal places.

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Question 7

Below are the times (in days) it takes for a sample of 6 customers from Trey's computer store to pay their invoices.

15, 41, 33, 13, 29, 37

Send data to calculator Find the standard deviation of this sample of times. Round your answer to two decimal places.

Topic:

Statistics

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Question 8

The monthly salaries (in thousands of dollars) of a sample of 5 sales representatives are as follows.

7, 13, 12, 9, 9

Send data to calculator Find the standard deviation of this sample of monthly salaries. Round your answer to two decimal.places.

Topic:

Statistics

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Question 9

(a) A reporter has recorded the rating (G, PG, PG-13, or

R

) of each movie played in a theater over the past year. Which measure gives the most common rating? Mean Median Mode (b) A car dealer has used cars for sale for the following amounts: \[ \ 3400, \ 3500, \ 3600, \ 3700, \ 3900, \ 4000, \ 4200, \ 4300, \$ 4500 \text {. } \] Which measure should be used to summarize the data? Mean Median Mode (c) In a survey, 9 people gave the following ratings for a local politician (on a scale of 0 to 100 ):

12, 40, 43, 46, 47, 48, 49, 51, 52

Which measure should be used to summarize the data? Mean Median Mode

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Question 10

Shade

B^{'} \cup C^{'}

on the Venn diagram.

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Statistics

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Question 11

The scatter plot shows the average monthly temperature,

x

, and a family's monthly heating cost,

y

, for 25 different months. (a) Write an approximate equation of the line of best fit for the data. It doesn't have to be the exact line of best fit. (b) Using your equation from part (a), predict the monthly heating cost for a month with an average temperature of 45 o

F

. Note that you can use the graphing tools to help you approximate the line.

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Question 12

For each pair of statements, choose the one that is true.

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Question 13

e 3 tr Identifying true statements involving subsets and proper subsets Here are the meanings of some of the symbols that appear in the statements below. - E means "is a subset of." - C means "is a proper subset of." - If means "is not a subset of," -

\emptyset

is the empty set. For each statement, decide if it is true or false.

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Question 14

Jina is going to pack snacks to share with her friends on a hike. She has 13 snacks to choose from: 8 are salty and 5 are sweet. She is going to choose 7 snacks. (a) In how many ways can Jina choose 7 snacks if the number of sweet snacks must be less than 3 ? (b) In how many ways can Jina choose 7 snacks if the number of sweet snacks must be greater than or equal to 3 ?

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Question 15

Here are the meanings of some of the symbols that appear in the statements below. -

\subseteq

means "is a subset of." -

C

means "is a proper subset of." -

Z

means "is not a subset of." -

\emptyset

is the empty set. For each statement, decide if it is true or false.

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Question 16

The Mitchell family is selecting a furniture set. A furniture set has a bed, a desk and a dresser. There are 3 beds, 4 desks, and 1 dresser to select from. How many different furniture sets could they select?

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Question 17

(a) A pizza parlor has a choice of 12 toppings for its pizzas. From these 12 toppings, how many different 8 -topping pizzas are possible?

495

(b) A certain committee consists of 17 people. From the committee, a president, a vice-president, a secretary, and a treasurer are to be chosen. In how many ways can these 4 offices be filled? Assume that a committee member can hold at most one of these offices.

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Question 18

The equation of a line is given below.

3 x - 5 y = 5

Find the slope and the

y

-intercept. Then use them to graph the line. Continue

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Question 19

1.1.4 Qukz Biology, Technology, and Society Question 3 of 10 Which two activities are examples of the work of engineers rather than of scientists?

Developing a new technique to measure water purity
Studying how wildlife is affected by pollution
Designing materials to absorb water
Comparing root structures in different kinds of plants

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Question 20

xam Lesson Name: Digital Citizenship, Ethics, and Culture xam number

700945 R

Exam Guidelines Exam instructions Question 12 of 20 : 12. Abby becomes very interested in birdwatching She does some research on the best type of binoculars to buy for birdwatching, and soon, all the online advertisements she sees are for birdwatching guides and products. Instagram and Tik Tok sugpest several popular birdwatchers for her to follow Abby is now A. a fikfer butite B a digtal culture

C

evecho chamber D. an algonithmi

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All Topics - Statistics Questions asked by Filo students

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