Based on a sample of 20 men, 45% owned cats Based on a sample of 80 women, 50 % owned cats what is the test statistic and the p-value (to 2 decimals)?

Q: A random sample of 105 students of University A showed that 12 were in favour of a new grading…

A: Given: Sample size (n1)=105Sample size (n2)=108x1=12x2=18α=0.01

Q: An executive believes that no more than 80% of the company’s employees take all of their vacation…

A:

Q: 55% of students entering four-year colleges receive a degree within six years. Is this percent…

A: hypothesis  H0 : p'=0.55 H1 : p'≠0.55 test statistic Z =P' -ppqn

Q: A software company is interested in improving customer satisfaction rate from the 69% currently…

A: Given Hypothesized pop. proportion, p0=0.69Favorable cases,x=146Sample size,n=193Sample…

Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A…

A:

Q: A software company is interested in improving customer satisfaction rate from the 60% currently…

A:

Q: .The percent of free throws made by an NBA team last year was 68%. The coach wants to know if that…

A:

Q: In 1965, about 44% of the U.S. adult population had never smoked cigarettes. A national health…

A: Given Information: Population proportion (p) = 0.44 Sample size (n) = 1360  Sample proportion (px) =…

Q: Jump to level 1 software company is interested in improving customer satisfaction rate from the 76%…

A: Given data, p=76% =0.76 n=230 x=183 Sample proportion is   Test Statistic z=?

Q: ​Claim: Fewer than 90​% of adults have a cell phone. In a reputable poll of 1104 ​adults, 85​% said…

A: We have given that  Sample size n =1104 Population proportion p=90%=0.90 Sample proportion…

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

A: The Null and Alternative Hypotheses is given by: H0: p0=0.80 H1: p0≠ 0.80 The sample proportion is…

Q: In a survey by Bea et al., it was found that 218 of 1,062 urban residents had a history of allergic…

A: Formula of test statistic : z = p^1 -p^2p(1-p)1n1-1n2 Where , p^1 and  p^2 are sample proportion. n1…

Q: The sports coaches at West High School believe that 12% of their students play soccer. In a sample…

A: Given that Sample size n = 155 Number of students who play soccer, X = 21 Claim : 12% of students…

Q: The test statistic is: (round to 3 places) The p-value is: (round to 3 places)

A:

Q: An executive believes that no more than 80% of the company's employees take all of their vacation…

A: From the given information, the claim of the problem is 'no more than 80% of the company's employees…

Q: A software company is interested in improving customer satisfaction rate from the 61% currently…

A: It is given that x=176, n=267 and P=0.61.

Q: A software company is interested in improving customer satisfaction rate from the 78% currently…

A: Givenp=78%=0.78x=108n=132p^=xn=108132=0.8182

Q: Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A recent…

A:

Q: What is the​ p-value?

A: Here sample size is too large so use z test for proportion

Q: A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana…

A: Given,n=400x=144p^=xnp^=144400=0.36

Q: A very wise teacher measured brain activity in all 20 seniors in his Statistics class in the first…

A: We have to find p value for given testing.

Q: A software company is interested in improving customer satisfaction rate from the 74% currently…

A: Z-Test:  Here the hypothesis test is for the population proportion. The test statistics compared…

Q: ​Claim: Fewer than 90​%of adults have a cell phone. In a reputable poll of 1149​adults, 81​% said…

A: It is given that 90% of the adults have a cell phone. The population proportion P is, 0.90. Also,…

Q: Researchers examined the relationship between social playtime and emotional intelligence in a sample…

A: From the provided information, The hypotheses can be constructed as: H0: ρ = 0 (There is no…

Q: Mr. Lauro decided to give a bonus point to the top 25% of students, a remedial instruction to the…

A: The question is about to find quartiles of a discrete data Given :

Q: What can be concluded at the αα = 0.05 level of significance?

A: Given that sample size n = 399 Number of millionaires who could wiggle their ears, X = 60 Level of…

Q: A random sample of 72 households was selected for a phone survey. The key question asked​ was, "Do…

A:

Q: A software company is interested in improving customer satisfaction rate from the 75% currently…

A: Hypotheses: The null and the alternative hypotheses are, H0:p=0.75H1:p>0.75

Q: According to the 2005-2006 National Pet Owners Survey, only 16% of dogs were adopted from an animal…

A:

Q: A teacher measured brain activity in all 60 seniors in her Statistics class in the first week of…

A: The null and alternate hypothesis are H0 : μd=0HA : μd<0 where, μd is the difference of the first…

Q: ​Claim: Fewer than 95​% of adults have a cell phone. In a reputable poll of 1076​adults, 88​% said…

A: From the provided information, Sample size (n) = 1076 Sample proportion (p̂) = 0.88 The hypotheses…

Q: A software company is interested in improving customer satisfaction rate from the 77% currently…

A: Solution: Given data p = 0.77 sample size (n) = 248 x = 202 Sample Proportion is given  by; (p̂) =…

Q: A software company is interested in improving customer satisfaction rate from the 66% currently…

A: From the provided information, A software company is interested in improving customer satisfaction…

Q: b) A test of 80 youths and 120 adults showed that 18 of the youths and 10 of the adults were…

A: Given: The sample number of youths are n1=80. The sample number of adults are n2=120. The number of…

Q: A software company is interested in improving customer satisfaction rate from the 76% currently…

A: It is given that, A software company is interested in improving the customer satisfaction rate from…

Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A…

A: The question is about hypo. testing for difference between two popl. prop. Given : No. of college…

Q: The percent of the population that is left-handed has historically been 10%. In a random sample of…

A: Solution: State the hypotheses Null hypothesis: That is, the per cent of the population that is…

Q: A random sample of 1067 teenagers (ages 12 to 17) were asked whether they played games online; 787…

A:

Q: A software company is interested in improving customer satisfaction rate from the 53% currently…

A: Statistical tests are used to calculate the test statistic and p-value. This test statistic and…

Q: 4. A researcher claims that the percentage of infants who receive immunizations is less than 80%.…

A: The value of test statistic is,

Q: A random sample of 68 households was selected for a phone survey. The key question asked was, "Do…

A: From the provided information, Sample size (n) = 68 The number of respondents who said yes that they…

Q: A historian examining British colonial records for the Gold Coast in Africa suspects that the death…

A: The number of samples extracted from the population is the sample size. When the sample size 30 or…

Q: A study found that 13% of Americans have seen or sensed the presence of an angel. A contingent…

A:

Q: Out of 300 students in the school, 225 passed an exam. You take a sample of 10 of these students.…

A: Given ,total students n=300                       x=225…

Q: The weights in ounces of a sample of running shoes for men and women are shown. If we want to test…

A: The mean significance is tested for the larger population by taking samples into accounts using the…

Q: The General Social Survey is an annual survey given to about 1500 U.S. adults selected at random. A…

A: From the provided information,

Q: Newborn babies are more likely to be boys than girls. A random sample found 13,173 boys were born…

A: We have to use CLT for finding the probability for proportions.

Q: Based on historical data, your manager believes that 32% of the company's orders come from…

A: Given, p=0.32 n=84 Mean: μ=np=0.32*84=26.88 Standard deviation: σ=p1-pn=0.321-0.3284=0.051

Q: 2. In the past, approximately 24% of workers said they brought work home with them, at least…

A: Let p be the population proportion p=24%, X=104, n=104, level of significance ɑ=0.05

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.