The Pew Internet and American Life Project reported on the widespread use of the Internet to search for information regarding experimental treatments or medicines. From telephone interviews of 1286 adult Internet users, it was found that 236 had searched for information on experimental treatments or medicines in the past year.  If the study were repeated with a sample of 1093 adult Internet users, what would the margin of error increase, decrease, or stay the same? Based on the interval calculated, could one conclude less than 20% of adult Internet users have searched for information on experimental treatments or medicines in the past year? Yes because the lower limit of the interval is less than 20%. No because the upper limit of the interval is greater than 20% while the lower limit is less than 20%. Yes because both limits of the interval are below 20%. No because both limits of the interval are below 20%.

Q: In a survey, 31 people were asked how much they spent on their child's last birthday gift. The…

A: Sample size, n = 31Mean = 48Standard deviation = 8

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A: Answer: - A bell shaped with mean μ = $48  ans standard deviation σ = $8.                The sample…

Q: n a survey, 32 people were asked how much they spent on their child's last birthday gift. The…

A: Given that, x¯=$30s=$7n=32 The degree of freedom is, df=n-1    =32-1    =31 Critical value: Using…

Q: A standardized exam's scores are normally distributed. In a recent year, the mean test score was…

A: The mean is 1498 and the standard deviation is 312.

Q: In a survey, 29 people were asked how much they spent on their child's last birthday gift. The…

A: Givensample size(n)=29mean(x¯)=47standard deviation(s)=2α=1-0.95=0.05α2=0.025Degrees of…

Q: Find the margin of error at a 90% confidence level.

A:

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A: a) The sample size can be estimated as follows: n=ze2p(1-p)where, z = z scoree = errorp =…

Q: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The…

A: We have to find margin of error

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

A:

Q: In a survey, 12 people were asked how much they spent on their child's last birthday gift. The…

A: We have given that,  Sample mean (x̄) = $ 34, standard deviation (s)= $ 5, sample size (n) = 12 and…

Q: An estimator for parameter v is consistent if E(v) is close to v when sample size is increased.…

A: Given If E(v) is close to parameter v, the estimator is consistent.

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A:

Q: An economist is interested in studying the incomes of consumers in a particular country. The…

A: It is given that the standard deviation is 1,000. Margin of error, E is 50. The confidence level is…

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: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A: Obtain the sample size of a preliminary estimate for p with 0.26. The formula of sample size is,…

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

A: Since the population standard deviation is unknown, t distribution can be used for the computation…

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

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

Q: A Gallup survey based on telephone and face-to-face interviews with 4,220 adults in China, aged 15…

A:

Q: na survey, 29 people were asked how much they spent on th vere roughly bell-shaped with a mean of…

A:

Q: In a survey, 23 people were asked how much they spent on their child's last birthday gift. The…

A: We have given that  Sample size=n=23 Mean=mu=37 Standard deviation=S=4 90% confidence level

Q: In a study of government financial aid for college students, it becomes necessary to estimate the…

A: Solution: From the given information, confidence level is 0.95, p=0.40 and E=0.03.

Q: In a survey, 18 people were asked how much they spent on their child's last birthday gift. The…

A: Given  The results were roughly bell-shaped with a mean of $37 and standard deviation of $3 Sample…

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

A: given data  n = 15x¯ = 39s = 980% ci for μ. find ME = ?

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

A: Given, Sample size, n = 13 Sample mean = 44 Sample standard deviation, s = 10 Confidence level = 80%…

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

A: We have given that,  Sample mean (x̄) = $ 44, standard deviation (s) = $ 10, sample size (n) = 30…

Q: The Centers for Disease Control reported the percentage of people 18 years of age and older who…

A: It is given that margin of error (E) is 0.02 and the confidence level is 95%.Here,

Q: On September 14, 2000, a cross-sectional survey of 24,000 residents of a western state revealed that…

A: Given: n = 24000 Number of tuberculosis cases X = 145 Proportion p^ = Xn Formula Used: Confidence…

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

A:

Q: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The…

A: The summary of statistics is,

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

A:

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

A:

Q: The mean cost of a meal for two in a mid-range restaurant in Tokyo is $40 (Numbeo.com website,…

A: Given the mean cost of a mean for two in mid- range restaurant in tokyo is $40.The data for cost of…

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

A:

Q: In a survey, 17 people were asked how much they spent on their child's last birthday gift. The…

A: Given that: Sample size=n=17 Sample mean=x¯=41Standard deviation=s=999% confidence level, i.e,…

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

A: Given: Sample size=n=27Mean=x¯=31Sample standard deviation=s=8α=0.01

Q: Your professor wishes to estimate the proportion of ALL high school students enrolled in…

A:

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

A:

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.