Statistics question and answers for September 17, 2023
- Q In a survey of 2326 adults in a recent year 1272 say they have made a New Year s resolution Construct 90 and 95 confidence intervals for the population proportion...
- Q Find the P value for a left tailed hypothesis test with a test statistic of z 1 44 Decide whether to reject H level of significance is 0 10 P...
- Q A humane society claims that less than 62 of households in a certain country own a pet In a random sample of 400 households in that country 236 say they...
- Q H 626 Find the complement of the claim H 626 Which is Ho and which is H O A Ho H 626 H 626 O D Ho H 626 H...
- Q A null and alternative hypothesis are given Determine whether the hypothesis test is left tailed right tailed or two tailed Ho o 3 1 Ha o 3 1 What type...
- Q A sales assistant is hanging 13 sweaters on a rack He has 5 purple sweaters 6 brown sweaters and 2 pink sweaters In how many distinct orders can the sweaters...
- Q 2 The change in scales makes it hard to compare scores on t 1996 math SAT mean 500 standard deviation 100 Jane to in 1996 and scored 520 A Find...
- Q The state test scores for 12 randomly selected high school seniors are shown on the right Complete parts a through c below Assume the population is normally distributed a Find...
- Q Listed in the accompanying table are numbers of hospital admissions in one region due to traffic accidents on different Fridays falling on the 6th day of a month and the...
- Q laim More than 4 5 of homes have only a landline telephone and no wireless phone Sample data A survey by the National Center for Health Statistics showed that among...
- Q A data set includes weights in grams of 37 Reese s Peanut Butter Cup Miniatures The accompanying Statdisk display shows results from using all 37 weights to test the claim...
- Q In a random sample of 26 people the mean commute time to work was 34 8 minutes and the standard deviation was 7 1 minutes Assume the population is normally...
- Q The birth weights of full term babies have mean 7 44 pounds and standard deviation 1 7 pounds Find the birth weight that separates the heaviest 15 of babies If...
- Q A researcher wants to determine the number of hours per week that the typical student at CRC watches television He wants to estimate the mean to within 5 hours with...
- Q and 95 confidence intervals for the population mean Interpret the results and compare the widths of the confidence intervals From a random sample of 41 business days the mean closing...
- Q An investor is considering funding a new video game She wants to know the proportion of people in the United States who play video games A survey is being planned...
- Q The amounts of nicotine in a certain brand of cigarette are normally distributed with a mean of 0 912 grams and a standard deviation of 0 324 grams Find the...
- Q Suppose that the value of a stock varies each day from 12 82 to 34 17 with a uniform distribution Find the third quartile i e 75 of all days...
- Q The lifespan of refrigerators is normally distributed with mean 14 years and standard deviation 2 4 years If 14 refrigerators are randomly selected there is a 72 probability that the...
- Q In an election suppose that 53 of the voters in fact support funding the new CRC library building A news organization wants to predict the outcome of the election by...
- Q Based on data obtained form AC Nielsen the mean number of televisions in a household in the U S is 2 13 with a standard deviation of 1 32 What...
- Q A pediatrician obtains the heights of her three year old female patients The heights are approximately normal with mean 35 98 inches and standard deviation 3 96 inches The middle...
- Q 2 A social scientist suspects that the mean number of years of education for adults in certa city is greater than 12 years She surveys a random sample of 100...
- Q Show all work No work no credit The only exceptions to this are values obtained using 1 Var stats or LinReg ax b or critical values from the t table...
- Q Round answers to 4 decimal places Use and necessary show all work including calculator functions 1 The mean score on the SAT Math Reasoning exam is 516 A test preparation...
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