A researcher claims that more than 30% of US smartphone owners use their phones (shopping, social networking, etc)  while watching television.  In a simple random sample of 15 smartphone owners, 38% say that they use their phones while watching television.  At the alpha = 0.05 level, is there enough evidence to support the researchers claim?   Write the p-value of the test rounded to 4 decimal places, and the one sentence conclusion written like a statistician.

Q: Closing prices of two stocks are recorded for 50 trading days. The sample standard deviation of…

A: It is given that the sample size is n=50. The sample standard deviation of stock X is sx=4.897. The…

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

A:

Q: Variety magazine recently ask a random sample of readers if Disney Plus was "as good as" Netflix.…

A: The 90% confidence interval is [0.4575, 0.5225]

Q: According to a national statistics bureau, 3.7% of males living in the Southwest were retired…

A: Given Information: 3.7% of males living in the Southwest were retired exterminators. i.e.,p0 =…

Q: Most adults would erase all of their personal information online if they could a software firm of…

A: Given data, n=413 p^=0.59 Population proportion p=0.5 Test statistic=?

Q: Markus is not as smart as his friends in class so he wants to take private lessons to his friends as…

A: Given : we will calculate the standard deviation of the data  sample size, n = 8 Sum, Σx = 88 Mean,…

Q: what is the test statistic? (please round your answer to 2 decimal places

A: Given : x1= 40 n1= 86 x2= 43 n2= 89

Q: found that 30 of the people arrived at least as early as the airport recommends. At the 1%…

A: It is given that  Population proportion, p = 50% = 0.5 Favourable cases, X = 30 Sample size, n = 50

Q: A survey was conducted that asked 1013 people how many books they had read in the past year. Result…

A: Answer: From the given data, Sample size (n) = 1013 Sample mean x¯ = 13.8 Standard deviation (s) =…

Q: A well-known brokerage firm executive claimed that at least 90% of investors are currently confident…

A: In order to determine whether the population proportion of investors who are confident of meeting…

Q: Describe Extra Sensitivity of One-Tailed Tests.

A: In testing of hypothesis , One-tailed test is determined by the alternative/composite hypothesis.…

Q: A psychologist assigned a new aptitude exam to measure logical and analytical thinking abilities.…

A: We have to find given probability.

Q: In 2003, Major League Baseball took steps to speed up the paly of baseball games in order to…

A: For 2002 : Sample size is N1=94N_1= 94 , Number of games in which finished in less than 3 hours  is…

Q: According to Forbes, there are currently 2,153 billionaires in the US. A professor studying wealth…

A: The mean difference between the two sample tested whether there is any significance difference…

Q: Most adults would erase all information online if they could 113 random selected adults showed that…

A: The random variable erase all of their personal information online is normally distributed. The…

Q: A sample of 27 account balances of credit company showed a mean of customer balance of 6,000, but…

A: Given data : sample size, n = 27 sample mean, x̄ = 6000.0 sample standard…

Q: 7 min and a standard deviation of 22.4 min. Assume that the 22 sample values appear to be from a…

A: The random sample of 22 values; n=22 The mean wake time 78.7 and standard deviation 22.4 x=78.7…

Q: There 39 arrest last month and the police files said 22 were malea aged 15-34 years. Use 5% level of…

A: Note: Hey there! Thank you for the question. As you have posted two independent questions, according…

Q: A clinical trial was conducted to test the effectiveness of a drug for treating insomnia in older…

A: It is given that the sample mean is 77.9 and the standard deviation is 20.4.

Q: A poll conducted asked a random sample of 1342 adults in the United States how much confidence they…

A: Given,             Hypothesis                        It is a Left-tailed test.

Q: The data "sea_pets_samp" is a simple random sample of 100 cases from the dataset "seattlepets" from…

A:

Q: The drug OxyContin is used to treat pain, but it is dangerous because it is addictive and can be…

A: Given,n=278x=76p^=xnp^=76278=0.2731-p^=1-0.273=0.727α=1-0.90=0.1α2=0.05Z0.05=1.645  (from Z-table)

Q: College admissions officer sampled 124 entering freshmen and found that 35 of them scored less than…

A: From the provided information, Sample size (n) = 124 Out of which 35 scored less than 530 on the…

Q: Pew Research conducted a survey back in March of 2021 that explored the topic of discrimination…

A:

Q: On April 15th, 1912, the R.M.S. Titanic sank into the North Atlantic Ocean, resulting in the loss of…

A: Number of individuals in each of the service of titanic : Number of passengers in crew = 885 .…

Q: Is it commonly believed that the mean body temperature of a healthy adult is 98.6f you are not…

A: Solution: From the given information, the claim is that the mean body temperature of a healthy adult…

Q: I'm a survey of 2589 adults 1500 say they have started paying bills online in the last year.…

A:

Q: in december 2001 the research firm gfk surveyed baby boomers (americans born between 1946 and 1964).…

A: From the given information we find the 90% confidence interval.

Q: A survey found that 611 out of 663 college graduates cannot correctly spell the word aluminum. Find…

A: Given that  A survey found that 611 out of 663 college graduates cannot correctly spell the word…

Q: The owner of the Peach Pit restaurant examined 61 randomly selected sample receipts for parties of…

A: It is given that the sample size 61 and the sample mean is $39.20 and the sample standard deviation…

Q: According to a study, the proportion of individuals in which cover their mouths when sneezing is…

A: Z score for single proportion test is use for testing the proportion

Q: Pew Research Center poll of 1501 randomly selected U.S. adults showed that 70% of the respondents…

A:

Q: A study done by researchers at a university concluded that 90% of all student athletes in a country…

A: The question is based confidence interval for a popl. proportion Given : Prop. of all student…

Q: Are there more words in the English language   That start with an "r" OR For which "r" is the…

A: Consider the given situation:"Are there more words in the English language that start with an "r" OR…

Q: The data "sea_pets_samp" is a simple random sample of 100 cases from the dataset "seattlepets" from…

A:

Q: A research center claims that more than 37% of U.S adults eat breakfast everyday. In a random sample…

A: Solution: State the hypotheses Null hypothesis: That is, the proportion of U.S adults eat breakfast…

Q: Apple Computer believed that 36 percent of its smartphone customer own the most recent model of…

A: Here we conduct Z test for proportion.

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.