Start your trial now! First week only $4.99!*arrow_forward*

Question

Assume that a sample is used to estimate a population mean μμ. Find the 90% confidence interval for a sample of size 53 with a mean of 56.8 and a standard deviation of 10.5. Enter your answer as an **open-interval** (*i.e.*, parentheses) accurate to 3 decimal places.

90% C.I. =

The answer should be obtained without any preliminary rounding.

Tagged in

Math

Statistics

Find answers to questions asked by students like you.

Q: Blood Only 4% of people have Type AB blood.a) On average, how many donors must be checked to findsom...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: As part of a study of corporate employees, the director of human resources for PNC Inc. wants to com...

A: From the provided information,

Q: You want to obtain a sample to estimate a population proportion. Based on previous evidence, you bel...

A: Obtain the sample size of a preliminary estimate for p with 0.70. The formula of sample size is, Us...

Q: Bookstore sales revisited Recall the data we saw inChapter 6, Exercise 3 for a bookstore. The manage...

A: Consider the following data from a small bookstore.

Q: Given X̄=33, s=9 and n=25, construct the following confidence intervals: the 95% confidence interval...

A: Click to see the answer

Q: Rainmakers again The table lists the amount of rainfall(in acre-feet) from the 26 clouds seeded with...

A: a. The data represents the amount of rainfall in acre feet for a random sample of 26 clouds that are...

Q: Real estate redux The regression of Price on Size ofhomes in Albuquerque had R2 = 71.4,, as describe...

A: Click to see the answer

Q: Speed (mph) Stopping Distances (ft)20 64, 62, 5930 114, 118, 10540 153, 171, 16550 231, 203, 23860 3...

A: Hi! Thank you for posting the question. Since your question has more than three sub-parts, we have s...

Q: Seeds Information on a packet of seeds claims that thegermination rate is 92%. What’s the probabilit...

A: Click to see the answer

Q: Parcheesi You are three spaces from a win in Parcheesi.On each turn, you will roll two dice. To win,...

A: Note: the answers will vary. One of the possible answers is given. Given that while playing a Parche...

Q: in 2004, an environmental research group studied the performance of truss and frame structures subje...

A: Click to see the answer

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

A: Click to see the answer

Q: Suppose that the amount of time that students spend studying in the library in one sitting is normal...

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for ...

Q: H0 : µ= 60 H1 : µ > 60 X̄=62 σ=10 n=100 and α=.05 The computed value of Z (Zc ) or t (...

A: Click to see the answer

Q: Blood The American Red Cross says that about 45% ofthe U.S. population has Type O blood, 40% Type A,...

A: Click to see the answer

Q: SAT Prep Can special study courses actually help raiseSAT scores? One organization says that the 30 ...

A: a. An organization states that there is an average gain of 60 points in the test of 30 students who ...

Q: 10. Jackpot On February 11, 2009, the AP news wirereleased the following story:(LAS VEGAS, Nev.)—A m...

A: a. The biggest slot machine payout ever is hitting a jackpot at $38.7 million. The maker made a stat...

Q: Express the confidence interval 27%±6.9% 27%±6.9% in the form of a trilinear inequality.% <p<&...

A: Consider that p is the population proportion The given confidence interval is:

Q: A smart phone manufacturer is interested in constructing a 99% confidence interval for the proportio...

A: Click to see the answer

Q: Winter in the city Summary statistics for the data relat-ing the latitude and average January temper...

A: a. Find the percent of variation in January temperature can be explained by variation in Latitude. T...

Q: Traffic headaches A study of traffic delays in 68 U.S.cities found the following relationship betwee...

A: The data represents the relationship between the total delay of traffic in hours and main highway sp...

Q: In a test of the quality of two television commercials, each commercial was shown in a separate test...

A: a)

Q: Out of 600 people sampled, 402 had kids. Based on this, construct a 90% confidence interval for the ...

A: Click to see the answer

Q: Drunks Police often set up sobriety checkpoints—roadblocks where drivers are asked a few brief quest...

A: Click to see the answer

Q: 3. The University Secretary wants to determine how University grade point average, GPA (highest bein...

A: Note: Hey, since multiple sub parts are posted, we will answer first three sub parts according to ou...

Q: When to stop? You play a game that involves rollinga die. You can roll as many times as you want, an...

A: Given: The game is played that involves rolling a die. It is rolled as many times and the scores is ...

Q: Antidepressants A study compared the effectiveness ofseveral antidepressants by examining the experi...

A: a) Yes it is appropriate to calculate correlation between drug improvement and placebo. From the sca...

Q: Heating After keeping track of his heating expenses forseveral winters, a homeowner believes he can ...

A: Solution: Hey, since multiple sub parts are posted, we will answer first three subparts according to...

Q: Oakland passengers The scatterplot below shows thenumber of passengers departing from Oakland (CA)ai...

A: a. The scatterplot for passengers and years since 1990 is given. In addition the residual plot for y...

Q: Marketing companies are interested in knowing the population percent of women who make the majority ...

A: From the provided information, Sample size (n) = 200 households Out of which 120 of them, the woman ...

Q: 0 9 10 10 10 4 12 7 11 5 0 8 3 a. To compute the confidence interval use a ? t z distribution....

A: Click to see the answer

Q: Assume that a sample is used to estimate a population proportion p. Find the 95% confidence interval...

A: Click to see the answer

Q: A test is designed to detect cancer. If a person has cancer, then the probability that the test will...

A: Click to see the answer

Q: Assume that x has a normal distribution with the specified mean and standard deviation. Find the ind...

A: Solution: From the given information, X follows normal distribution with mean µ=6 and a standard dev...

Q: A newsgroup is interested in constructing a 95% confidence interval for the proportion of all Americ...

A: Click to see the answer

Q: Wrong conclusion A Statistics student properly simu-lated the length of checkout lines in a grocery ...

A: After simulating the length of checkout lines in a grocery store, the statistics student reported th...

Q: Reading To measure progress in reading ability, studentsat an elementary school take a reading compr...

A: a. The fitted line plot for average reading level and grade level at an elementary school is given. ...

Q: Kindergarten Companies that design furniture forelementary school classrooms produce a variety of si...

A: Click to see the answer

Q: A geneticist is interested in the proportions of males and females in a population who have a certai...

A: Click to see the answer

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 500 adul...

A: Click to see the answer

Q: -According to a recent report, 65%of Internet searches in a particular month used the Google search ...

A: Hey there! Thank you for posting the question. Since your question has more than 3 parts, we are sol...

Q: Do math skills matter when looking for gainful employment? The latest U.S. Department of Educa-tion ...

A: Concept of conditional probability: For any two events A and B with P(B) >0, the formula for cond...

Q: Assume that a sample is used to estimate a population proportion p. Find the 98% confidence interval...

A: Click to see the answer

Q: Giving a test to a group of students, the grades and gender are summarized below A B C Total ...

A: Click to see the answer

Q: Which of the following best describes the difference between the interpretation of the correlation c...

A: Identify the correct option that interprets the difference between the interpretation of the correla...

Q: Frogs A wildlife biologist examines frogs for a genetictrait he suspects may be linked to sensitivit...

A: Note: Thank you for the question. Since multiple subparts are posted, according to our policy, we ...

Q: A fitness center is interested in finding a 90% confidence interval for the mean number of days per ...

A: Given information Sample Standard deviation = 1.7 Sample mean = 2.2 Sample size n = 213 Population s...

Q: Bias? Political analyst Michael Barone has written that“conservatives are more likely than others to...

A: Given: The response rate of standard survey was 42% The response rate of rigorous survey was 71%

Q: The lottery Many states run lotteries, giving away mil-lions of dollars if you match a certain set o...

A: On matching the certain set of winning numbers, on running the lotteries will give many millions of ...

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 200 adul...

A: Click to see the answer