1. A local news report claims that 40% of the vehicles on the freeways are vans or SUV's. You go to a nearby freeway overpass, count 60 vehicles, of which only 19 are vans or SUV's. Can we say, using a = .05, that the actual percentage is lower than the news report?

Q: If three out of every eight trick-or-treaters that came to your house last Halloween were dressed as…

A: Simplify to get the answer.

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: Two sample z test for proportions: Two sample z test for proportions is the hypothesis test to test…

Q: 1. Is the average suicide rate in January greater than or less than 1 in 100,000? 2. Are males or…

A: 1. From the graph it can be seen that in the              month of January suicide rate is below 1…

Q: c. How could you proceed to find out how many of the eligible people would actually join the new…

A:

Q: What is the percentile rank of a student who is enrolled in 15 credits? (Hint: This is the same…

A: Given that , A survey of the population of 51 students asks how many credits students are taking and…

Q: 3. In a Gallup Pool, 52% of 1038 surveyed adults said that second hand smoke is "very harmful". What…

A: Following information is given:   Total number of people survey = 1038 Percentage of people who said…

Q: A telemarketer calls people and tries to sell them a subscription to a daily newspaper. On 19% of…

A: Given  A telemarketer calls people and tries to sell them a subscription to a daily newspaper On 19%…

Q: 37. Whatis the proportion of single women among those who are 30-44 years old? 38. Of the to tal…

A: The following information can be obtained from the table: Number of single women who are 30-44 years…

Q: 14) A researcher at a major clinic wishes to estimate the proportion of the adult population of the…

A:

Q: (b) What is the proportion of wolves that are female but do not hunt in medium-sized packs o are not…

A: Hi, the question have the multiple sub-parts and as per the guidelines I am obliged to answer first…

Q: d) What percentage of women are TALLER than 5 feet 11 inches? Round to nearest tenth of a percent. %…

A: Given Information: Mean height of adult men = 69.8 inches The standard deviation of height of adult…

Q: In a sample of 508 men who worked at home, 32% of them were college graduates. a.) Among the 508 men…

A:

Q: what proportion of people in relationships are dissatisfied?

A: Let , X→N(μ=60 , σ=8) Since , an individuals with a score 50 or less is considered dissatisfied. Our…

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A:

Q: b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9…

A: The data is given as:   Hours of sleep Age group 39 or younger 40 or older Fewer than 6 38 36…

Q: 1) what proportion of students scored above student 33 on homework 3? 2) what proportion of students…

A: Given:   Student ID HW 1 HW 2 HW 3 1 98 93 99 2 81 80 64 3 66 91 75.5 4 84 94 80 5 65…

Q: 7.) How much does the Over the Rainbow Bakery sell 18 cupcakes for? 8.) What is the proportion of…

A: Ingredients For 4 dozen for 225 cupcakes cake ingredients     Shifted flour 6…

Q: d) What proportion of people leave Vegas having lost between $200 and $800 (for a given year)?

A: (d) Obtain the Z-score for the random variable X equals 200. The Z-score for the random variable X…

Q: Suppose that in a group of 800 women, the percentage who work is the same as in the sample here, how…

A: men women total work 15 23 80 not work 23 28 51 total 38 93 131

Q: C) What percentage of CT scans in this target population would be positive?

A: Given: P(Cancer) = 3% = 0.03 P(No cancer) = 1-0.03 = 0.97. P(test positive|cancer) = 89% = 0.89…

Q: If eight out of every fifteen trick-or-treaters that came to your house last Halloween were dressed…

A: Total number of trick and treaters is 15x. Total number of trick and treaters who were dressed as…

Q: d. What percentage of terminals will last between 2.5 and 4.5 years? e. If the manufacturer…

A: Mean(µ) = 4 yearsStandard deviations (σ) = 10/12 = 0.83 yearX ~ N (µ, σ )= N(4, 0.83)

Q: Balance Middle East Asia 44% 46% Europe 6% Others America 3% 1% 2010 OFW Destination Middle Balance…

A: Given the pie chart for comparision of OFWs by work destination, 2000 and 2010.

Q: c)   If the scientists want to estimate the proportion of deer that carry Lyme disease ticks to…

A: We have given that,  Margin of error (E) = 0.02 and confidence level = 90% Then,  We will find the…

Q: 13. Does the last column of percentages in the table add up to 100%?Check the researchers'…

A: 13. The last column of percentages is given as: % 20.6 5.9 12.4 18.3 14.4 11.1 9.5…

Q: A sample of size 26 was gathered from high school seniors to estimate how many intended to attend…

A: Given that  Sample size (n) = 26 The proportion answering Yes (P) = 0.9 P = 0.9 ; Q=1-P = 1-0.9 =0.1…

Q: (a)  Do you think that the percentage of all American movie-goers who think the popcorn is…

A: Given that 12% of a random sample of 25 American movie-goers thought the popcorn sold at the movie…

Q: 19 2. How can you tell whether a greater percent of customers surveyed selected veggie burger or…

A:

Q: An educator desires to estimate, within 4%, the true percentage of high school students who study at…

A:

Q: Given a population of 5000 scores with mean µ = 86 and o=

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Q: A pollster wishes to estimate the true proportion of US voters who oppose capital punishment. How…

A: Given information Error = 3.5% = 0.035 Confidence level = 0.90

Q: The Arizona Department of Transportation wishes to survey state residents to determine what…

A: Suppose p̂ is the sample proportion of the population, who would like to increase state-wide…

Q: 1. What percentage of scores fell within ±1 SD for ZADHD?

A: By using Empirical rule, we can know that what percentage of data fall with in the number of…

Q: d) What percentage of women are TALLER than 5 feet 11 inches? Round to nearest tenth of a percent.…

A: formula for z-score is

Q: Use the figure to the right, which shows the percentages of adults from several countries who favor…

A: We have to test the claim that "the proportion of adults in Country C who favor building new nuclear…

Q: What percent of our campus is female? The Statistical Abstract of the United States, 112th edition,…

A:

Q: Estimate the following percentages without using a calculator. 10.1% of 7,800 is  0.99% of 83,583…

A: Percentage= (value ×percent)/100

Q: (a) What proportion of babies born full term are low-birth-weight babies? (b) What proportion of…

A: From the given information, let X be the full term baby birth weights. Here, X follows normally…

Q: a hospital wants to estimate the percentage of admitted patients who receive Medicare benefits. if…

A: To calculate the minimum sample size require to be 95% sure that margin of error will fall within 4…

Q: The US population is 13% African American.  If you were to take a SRS of 500 Americans, below what…

A: From the given data The US population is 13% African American

Q: It is bleieved that the percent of convicted felons who have a history of juvenile deliquency is…

A: Solution: State the hypotheses Null hypothesis: That is, the percent of convicted felons who have a…

Q: answer a A. the national percentage of automobile accident fatalities which are alcohol related is…

A:

Q: 1. What percentage of scores fell within ±1 SD for ZADHD?

A: Introduction: The "ZADHD" values indicate the z-scores of ADHD.

Q: Given a population of 5000 scores with mean µ = 86 and o= 10. How many scores 3. above 116?

A:

Q: How could the survey question "Have you ever had a drink of alcohol?" be revised to obtain a valid…

A: Introduction :- We are given one survey question. We have to revise these questions to obtain valid…

Q: The number of countries shown in this bar chart where the rate of rapes is below 10 for every…

A: Given information- We have given a bar chart showing the number of countries and the rate of rape…

Q: In what range would you expect to find the middle 50% of most head breadths? and Between If you were…

A:

Q: If five out of every eight trick-or-treaters that came to your house last Halloween were dressed as…

A: GIVEN: 5 out of every 8 trick or treaters that came to your house were dressed as cowboys.

Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.