A random sample of 65 individuals from the 25-30 age group was selected. After watching a 1-min video clip of the features of a new cell phone, they were asked "how much would be a fair price for that phone". The sample showed a mean $966 with a standard deviation $166. The 95% confidence interval for the amount this age group is willing to pay for the new phone should be $966 ± E. What is the margin of error E?

Q: According to a recent poll of eight social networking sites, the average monthly visitor count was…

A: In question, Given that a recent poll of eight social networking sites, the average monthly visitor…

Q: A sample of 56 Charleston County households have a mean income of $27,519 with a standard deviation…

A:

Q: A car repair business randomly selects receipts for parts purchased on 16 different jobs. The mean…

A: given data, n=16x¯=31.32s=30.42CI=0.95α=1-0.95=0.05df=n-1=16-1=15we  have to construct the 95%…

Q: What is the difference between commuting patterns for students and professors. 11 students and 14…

A:

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A: Given: n=28 standard deviation s = $5 confidence level = 98%

Q: You are a researcher for the National Highway Traffic Safety Administ estimate the average blood…

A: Given that,The sample size is The sample mean BAC (Blood Alcohol Concentration) is The known…

Q: 5. A researcher surveyed of 300 young adults ages 18-29 found that on average, those surveyed sent…

A: 5. Given that, n=300x¯=67.7s=23.6 Confidence level=90% Significance level=1-0.90-0.10…

Q: A sample of 47 Charleston County households have a mean income of $32,346 with a standard deviation…

A: The sample size is 47, sample mean is $32346, and sample standard deviation is $8571. The confidence…

Q: In a survey, 13 people were asked how much they spent on their child's last birthday gift. The…

A: The result of the survey is roughly bell-shaped. So, we assume that the population is approximately…

Q: 15. A random sample of 100 visitors to a popular theme park spent an average of $142 on the trip…

A: SOLUTION: Given average x=142          standard deviation σ=47.5          random sample n=100

Q: A study regarding the gender socialization of children growing up in nontraditional families…

A: The sample size is 57, sample mean difference is -2.0857 and standard deviation is 3.5868.

Q: A study was conducted to determine the effectiveness of hypnotism on reducing pain. Using standard…

A: Sample 1(before hypnosis): n1=8x¯1=8.713s1=2.177 Sample 2(after hypnosis): n2=8x¯2=5.588s2=2.608

Q: In a survey, 45 people were asked how much they spent on their last partners birthday gift. The…

A: Given information- Sample size, n = 45 Significance level, α = 0.10 Sample mean, x-bar = $90 Sample…

Q: In a survey, 27 people were asked how much they spent on their child's last birthday gift. The…

A: Given that n=27, s=6, Confidence level=95%

Q: An admission officer of a small liberal arts college wishes to compare the mean admission test…

A: Given: n1= 15 ,x̄1= 495.0 ,s1= 55.0 n2= 17 ,x̄2= 545.0 ,s2= 50.0 At 95.0 % confidence level with…

Q: Among those taking the Graduate Record Exam, 18 people are randomly selected. This group had a mean…

A:

Q: For a group of 45 students taking a PSDTF test, the mean heart rate was 96 beats per minute, and the…

A:

Q: 2. In a recent study of 35 college students, the mean number of hours per week that they played…

A: According to the given information in this question  We need to find the 95% confidence interval

Q: In a survey, 14 people were asked how much they spent on their child's last birthday gift. The…

A: From the given information, Sample size n =14 Sample mean, x̅=$49.5 Sample standard deviation,…

Q: A researcher is conducting a study to determine the mean trough dosage of medication for a…

A: The following information is provided that is required to compute the sample size: Required…

Q: In one study, young children under stress were shown to actually report fewer symptoms of anxiety…

A: To conduct a one-sample t-test, we need to define the null hypothesis and alternative hypothesis.…

Q: In a survey, 24 people were asked how much they spent on their child's birthday party. The results…

A: Introduction: The 100 (1 – α) % confidence interval for the population mean, μ, when the population…

Q: In a survey, 24 people were asked how much they spent on their child's last birthday gift. The…

A: The sample size is n=24 mean is =39 the standard deviation is =3.The confidence level is 95%, then…

Q: In a test of the effectiveness of garlic for lowering cholesterol, 47 subjects were treated with…

A:

Q: A student read that a 95% confidence interval for the mean age an American first drinks alcohol is…

A: Lower limit = 16 - 1.2 =14.8 Lower limit = 16 + 1.2 =17.2

Q: A recent study of 28 city residents showed that the mean of the number of years they lived at their…

A: The formula of confidence interval for the population mean is given by                  confidence…

Q: A study regarding the gender socialization of children growing up in nontraditional families…

A: It is needed to test whether the the gender attitudes changed from one generation of women to their…

Q: In a survey, 28 people were asked how much they spent on their child's last birthday gift. The…

A: Let X represents the time spent on their child's last birthday gift.  Given that the shape of the…

Q: The lead levels in a random sample of 35 crows in the region were measured and recorded. The mean…

A: It is given that  Sample size n = 35 Sample mean M = 4.50 Sample SD s = 1.12 Confidence level = 99%…

Q: In a survey, 20 people were asked how much they spent on their child's last birthday gift. The…

A: Given that  Sample size n =20 Sample mean=37 Standard deviation =7

Q: A study regarding the gender socialization of children growing up in nontraditional families…

A: Hypothesis test is consists of two statements. They are null and alternate hypothesis. Null…

Q: In a survey, 15 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: shoppers at the mall spend the same amount of money on average the day after Thanksgiving compared…

A: Given that    Sample sizes n1=56      , n2=43       Sample means X̄1= 145     , X̄2=123    , ?1 =46…

Q: In a survey, 30 people were asked how much they spent on their child's last birthday gift. The…

A: Given ,Sample size n = 30Sample mean x = 36Sample standard deviation (s0 =2d.F = n-1dF = 30-1 =…

Q: a survey, 16 people were asked how much they spent on their child's last birthday gift. The results…

A:

Q: In a survey, 10 people were asked how much they spent on their child's last birthday gift. The…

A:

Q: Suppose you observe 62 data points from a distribution with standard deviation 2.1, and you…

A: Given, n=62 data points standard deviation SD= 2.1, calculated a 92% two-sided confidence interval…

Q: company manufactures a certain over-the-counter drug. The company samples 80 pills and finds that…

A: We have given that  Sample size n = 80 Sample mean = 325.5 Standard deviation s=10.3 90%confidence…

Q: 20 TV remote controls were followed over the years to find the mean lifespan of this model. The…

A: Answer - Here  n = 20 TV remote controls were followed  over the years to find the mean…