A researcher wonders if the currently-believed global male-births proportion value of approximately p = 51.2% is still correct. The researcher decides to perform a two-sided significance test, and in advance, chooses a significance-level of 1%. The researcher then randomly samples the reported birth-sex information for 1000 recent global births, and finds that exactly 551 of these babies were reported to be males. In percentage form, and rounded to three digits past the decimal point: What is the approximate P-value of this test? Include a percentage symbol at the end of your numerical answer (with no spaces).

Q: local CBS affiliate claims its 11p.m. newscast reaches 41% of the viewing audience in the area. In a…

A: Given that p^=36%,p=41%

Q: According to past reports 51% of employees own a car. In a random sample of 106 employees, how many…

A: Total no.of employees(n)= 106 The percentage of employees own a car(p)= 0.51

Q: Nationally, 80 percent of adults own an thermometer. You are interested in whether the same…

A: We have given that  Sample size n = 100 Sample proportion p^=75%=0.75 Population proportion…

Q: A random sample of 2000 driver's license applications found that 17% reported their eye color as…

A:

Q: Construct a 90% confidence interval for the true difference between the mean amounts of time spent…

A:

Q: According to past reports 48% of employees own a car. In a random sample of 250 employees, how many…

A: Total no.of employees=250 The percentage of employees own a car=0.48

Q: State the frequency at or above the 80th percentile (include the frequency at the 80th percentile) :…

A: Percentile is calculated by dividing the population into 100 equal groups. from the given data the…

Q: How do you get online? A 2013 Pew Research survey of802 teens found that, among teens aged 12–17,…

A:

Q: A quality conscious disk manufacturer wishes to know the fraction of disks his company makes which…

A: Givensample size(n)=1635x=228p^=xn=2281635=0.139Confidence level=98%

Q: O224 O 124 O238 176

A: GIVEN DATA, p=0.169CI=0.90α=1-0.90=0.10E=0.04

Q: A research company claims that 55% of American watch TV. You test this claim by randomly sampling…

A:

Q: A national health survey weighed a sample of 260 boys aged 6-11 and found that 45 of them were…

A: Hypothesis Testing

Q: Given that the total sample of an FDT is 432, and the relative frequency of one of the classes is…

A: Total total relative frequency is add up to 100%  Here the  relative frequency of one class is…

Q: recent study reported that 12% of people toss away about half of what they buy at the grocery store.…

A: From the given information we conduct Z test for proportion.

Q: n the year 1990 25% of students at a particular university received some sort of scholarship. The…

A: Given Data: p^=12/25=0.48n=25   Null and Alternate hypothesis: H0: p=0.25 Ha: p≠0.25

Q: Using a significance level of 0.05, the critical value of the appropriate test statistic to conduct…

A: The sample size for first group is 13 and second group is 13.

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: A survey (sample ) of 300.  112 favor Republican candidate.  Construct the 98%CL for the true…

A: Given that,   The sample proportion is,

Q: If I have a sample of people’s ages, and the IQR is 20, what does this mean?

A: Given:  IQR for sample of people's ages is 20.

Q: The final answer for the test statistic from technology is as follows: Round to 2 decimal places. t…

A: In 1999, the average percentage of women who received prenatal care per country was 80.1%. want to…

Q: Use the given data and a 5% level of significance to determine whether the population varience for…

A:

Q: A nurse practitioner is studying the effects of sugary drinks on weight gain. To begin the study,…

A: Let us suppose the sample size equals n = 100 From the give relative frequency histogram we have the…

Q: We are asked to find the values that separate the middle 60% of the population from the top and…

A: In a normal distribution, the z-score is a measure of how many standard deviations an element is…

Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: A recent study indicated that 43% of the 100 women over age 55 in the study were widows. Round up…

A:

Q: Why a sample size of n=100 is more likely to have a percentage of pop songs closer to the population…

A: Sample of size 32 or greater is consider as large sample .

Q: A research group conducted an extensive survey of 3181 wage and salaried workers on issues ranging…

A:

Q: A software company is interested in improving customer satisfaction rate from the 80% currently…

A: Given that  Sample size n =243 Favorable cases x =205 Sample proportion p^=x/n  =205/243 =0.8436…

Q: You have been hired by a consortium of local car dealers to conduct a survey about the purchases of…

A: Given: Confidence level = 95% Margin of error = 0.03 Formula Used: n = ZαMargin of error2 p(1-p)

Q: A contributor for the local newspaper is writing an article for the weekly fitness section. To…

A: The question is about confidence intervalGiven :Randomly selected no. of people who exercise in the…

Q: A researcher gathered from historical papers that the proportion for the success of an event was…

A:

Q: For a sample of n=16 scores, how many scores are used to calculate the sample variance?

A:

Q: (d) What height corresponds to the 95th percentile in the Galton study?

A:

Q: You want to estimate the proportion of home accident deaths that are caused by falls. How many home…

A: Formula for the sample size needed to estimate a population proportion is

Q: You are testing a claim about a population proportion of 0.23. Find the test statistic given the…

A: Given that, You are testing a claim about a population proportion of 0.23.  The sample results are…

Q: America OnLine published a survey question. Among the 2,300 Internet users who responded, 20%…

A: From the given information, America OnLine published a survey question. Among the 2,300 Internet…

Q: In 2013, 46% of high school students tried a tobacco product. From a survey of 500 randomly…

A: Given : Population proportion =46% n=500

Q: For a sample of n=15 scores, how many scores are used to calculate the sample variance ?

A: Given that : For a sample of n=15 scores, how many scores are used to calculate the sample variance…

Q: If a fair coin is tossed 10 times what is the probabilty that the first five are the same side? Ans.…

A: When a coin is tossed, then there are 2 possible outcomes: Head and tail. So, each outcome can…

Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.