Chapter 6Quiz

A fireman's softball team wins 6 games out of the first 9 played. They go on to win all their remaining games and finish the season with a final average of games won of .750.  The TOTAL number of games they played that season was ?

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. In a marketing survey, a random sample of 726 women shoppers revealed that 638 remained loyal to their favorite supermarket during the past year (i.e., did not switch stores).

"Save today by switching to SOAR!" is the slogan for SOAR, a cell phone service provider. Logan wants to estimate how much money customers who switch to SOAR save on their monthly bill. He surveys 75 people who have recently switched to SOAR and asks each one how much they are saving in their monthly bill as a result of the switch. He finds the average savings of the sample to be $19.03 and historical records indicate that o = $4.71 What is the standard error in estimating monthly phone bill savings? 0.895 0.544 4.710 0.236

randa A survey was given to a sixth-grade class asking students if they wanted to have an after-school dance club. Three out of every four students said yes. Name: Problem 1 a. What fraction of the sixth-grade class responded yes? b. What percent of the sixth-grade class responded yes? Use the double number line below to model the situation. 2 3

The average annual precipitation on Mt. Washington, New Hampshire, is 90 inches. During one particularly wet year, different news reports carried the following statement. The precipitation this year is 200% of normal. What does this imply about the precipitation during this year?

EIGHTEEN Options for part (b) a. "Z"  b. "t"  c. "Chi-square"  d. "F"

From your hotel room, you look down at the street and want to estimate howmany taxis are available. You know that taxis are numbered sequentially, and,from your window, you can make out a passing taxi’s number as 50. What isyour unbiased estimate for the total number of taxis in town?

A researcher at a major hospital wishes to estimate the proportion of the adult population of the United States that has high blood pressure. How large a sample is needed in order to be 99% confident that the sample proportion will not differ from the true proportion by more than 4%? O A. 1,037 O B. 17 O C. 2,073 D. 849 Click to select your answer. DELL

Oxnard College reports your GPA on a 4.0 scale. The "4" in the 4.0 GPA scale is equivalent to an A, "3" is equivalent to a B, "2" is equivalent to a C, "1" is equivalent to a D, and "0" is equivalent to a F. Last semester, a student recieved the following gradesC in a 2 units Math course F in a 4 units Music course B in a 4 units Chemistry course A in a 4 units Journalism course What is the student's GPA for that term? Round to two decimal places. Student's GPA =

the answer 318 is wrong for B as provided by an previous expert. The formula is given in this picture for part b. Please only answer part B

The number of gallons of milk sold each day at a grocery store ........... variable  .

The FBI wants to determine the effectiveness of their 10 Most Wanted list. To do so, they need to find out the fraction of people who appear on the list that are actually caught. Step 1 of 2: Suppose a sample of 233 suspected criminals is drawn. Of these people, 72 were captured. Using the data, estimate the proportion of people who were caught after being on the 10 Most Wanted list. Enter your answer as a fraction or a decimal number rounded to three decimal places.   Step 2 of 2: Suppose a sample of 233 suspected criminals is drawn. Of these people, 72 were captured. Using the data, construct the 80% confidence interval for the population proportion of people who are captured after appearing on the 10 Most Wanted list. Round your answers to three decimal places.

According to the U.S. Census Bureau, the District of Columbia's population is currently 572,000. If the population has been growing at a average of 6% a year for the past ten years, what was the approximate population 10 years ago? Round to the nearest person. O 394,012 O 309,402 O 419,302 O 342,019

Suppose that the result of a public opinion poll shows that just 10% of people would be willing to give up their cell phones for 1 week in exchange for $100. How many people would need to be surveyed in order to have a margin of error of ±2%?

You recently received a job with a company that manufactures an automobile anti theft device. To conduct an advertising campaign for the product, you need to make a claim about the number of automobile thefts per year. Since the population of various cities in the United States varies, you decide to use rates per 10,000 people. (The rates are based on the number of people living in the cities.) Your boss said that last year the theft rate per 10,000 people was 44 vehicles. You want to see if it has changed. The following are rates per 10,000 people for 36 randomly selected locations in the United States. Assume σ = 30.3. U s e α = 0.05   Car Thefts 55 42 125 62 134 73 39 69 23 94 73 24 51 55 26 66 41 67 15 53 56 91 20 78 70 25 62 115 17 36 58 56 33 75 20 16 Use the traditional method to conduct the hypothesis test.   a/ Write the conjuncture b/ Find the critical value(s) c/ Find the test value d/ Make a decision e/ Write the summary

The price of a carpet was reduced by 90%. If the original price was $170, what was the amount by which the price was reduced? ..... The reduction was $. (Type an integer or a decimal.)

A Stork Rose $0.22 in the market on Thursday. If the resulting price was $68.222, what was the price on the stock before the rise? The price of the stock before the rise was $ _____ 

The state education commission wants to estimate the fraction of tenth-grade students that have reading skills at or below the eighth-grade level. Step 1 of 2 :   Suppose a sample of 1134 tenth graders is drawn. Of the students sampled, 226 read at or below the eighth-grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth-grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.

An investor has an account with stock from two different companies. Last year, hi stock in Company A was worth $5600 and his stock in Company B was worth $70 The stock in Company A has increased 20% since last year and the stock in Compa B has increased 5%. What was the total percentage increase in the investor's stock account? Round your answer to the nearest tenth (if necessary). ovo %23 & 4. a by C d. 3. S]

Imagine that Alina’s shower leaks and she calls the plumber. The plumber tells her that the problem is caused by either a leaky drain or a cracked shower pan, but never both. He also tells her that, in his experience, a leaky drain is the cause of the problem in about 90%90% of cases. If he discovers that the drain is the problem, he can fix it for $250$250. If he discovers that the shower pan is the problem, he must charge $2500$2500 instead. What is the expected value of the repair price? Please round your answer to the nearest whole dollar.

Write a how-many-groups word problem for 0.35 / 1.45 = ?

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. In a combined study of northern pike, cutthroat trout, rainbow trout, and lake trout, it was found that 22 out of 833 fish died when caught

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding. What percentage of your campus student body is female? Let p be the proportion of women students on your campus.

The American Heart Association is about to conduct an anti-smoking campaign and wants to know the fraction of Americans over 35 who smoke. Step 1 of 2 :   Suppose a sample of 1089  Americans over 35 is drawn. Of these people, 359 smoke. Using the data, estimate the proportion of Americans over 35 who smoke. Enter your answer as a fraction or a decimal number rounded to three decimal places.

The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 1 of 2: Suppose a sample of 2845 tenth graders is drawn. Of the students sampled, 2276 read above the eighth grade level. Using the data, estimate the proportion of tenth graders reading at or below the eighth grade level. Enter your answer as a fraction or a decimal number rounded to three decimal places.

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.In a combined study of northern pike, cutthroat trout, rainbow trout, and lake trout, it was found that 20out of 860fish died when caught and released using barbless hooks on flies or lures. All hooks were removed from the fish.   (a) Let prepresent the proportion of all pike and trout that die (i.e., pis the mortality rate) when caught and released using barbless hooks. Find a point estimate for p. (Round your answer to four decimal places.)(b) Find a 99% confidence interval for p. (Round your answers to three decimal places.) lower limit       upper limit

QUESTION 21 At Dubai English School, 313 students use buses to go to school. If this number is 36% of the total school enrollment, then how many students are enrolled in total? Round your answer to a whole number.