Answered: 1.4. For each of the following items…

Mathematics For Machine Technology

8th Edition

ISBN:9781337798310

Author:Peterson, John.

Publisher:Peterson, John.

Chapter29: Tolerance, Clearance, And Interference

Section: Chapter Questions

Problem 16A: Spacers are manufactured to the mean dimension and tolerance shown in Figure 29-12. An inspector...

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And question e is can you support the claim that the population mean number of miles driven annually by cars under the new contracts is less than 12,940. Yes or no?
Consider the data in the table in Ex 9.16. (photo attached) Does the data provide significant evidence at the 3.9% level, to indicate that the population mean time among schizophrenics exceeds the population mean time among normal individuals by more than 15.0?(zobs =3.612, z.039 =1.76 )
Assume that a populatio of thousands of people whose responses were used to develop the anxiety test had scores that were normally distributed with m=30 and sd =10. What proportion of people in this population would have anxiety scores within each of the followin ranges of scores? (a) below 20 (b) above 30 (c) Between 10 and 50 Either below 10 or above 50
Second, the researcher wishes to use graphical descriptive methods to present summaries of the dataon each of the two variables: hours worked per week and yearly income, as stored in fileHOURSWORKED.xls.a) The number of observations (n) is 65 individuals. The researcher suggests using 7 class intervalsto construct a histogram for each variable. Explain how the researcher would have decided onthe number of class intervals (K) as 7. b) The researcher suggests using class intervals as 10 < X ≤ 15, 15 < X ≤ 20, …, 40 < X ≤ 45 for thehours per week variable and class intervals 40 < X ≤ 45, 45 < X ≤ 50, ..., 70 < X ≤ 75 for the yearlyincome variable. Explain how the researcher would have decided the width of the above classintervals (or class width). c) Draw and display a histogram for each of the two variables using appropriate BIN values frompart (b) and comment on the shape of the two distributions.
In each of the following variables, decide which type of data grouping (single-value, limit, or cutpoint) is probably the best.a. Number of Bedrooms. The number of bedrooms per single family dwellingb. Ages of Householders. The ages of householders, given as a whole numberc. Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100 patients by using a particular brand of sleeping pill.d. Number of Smartphones. The number of smartphones per person.e. Gas Mileage. The gas mileages, rounded to the nearest number of miles per gallon, of all new car models.f. Grammostola. The weight, in grams, of a sample of 50 Grammostola, a variety of tarantulas.
For each of the following, identify the type of the variables. Indicate if it is quantitative or qualitative. If it is quantitative, indicate whether the variable is continuous or discrete. If it is qualitative, where it is ordinal or nominal. There should be two answers for every variable. Strength of an opinion (1-10 scale, strongly disagree to strongly agree) Color of hair (brown, blonde, black, gray) Temperature Age Sex Race/ethnicity
Consider the following data relating hours spent studying (X) and average grade on course quizzes (Y):                                                                 X                             Y                                                                 5                              6                                                                 3                              8                                                                 4                              8                                                                 7                              10                                                                 5                              7                                                                 6                              9 From these observations, can we conclude that hours spent studying caused increases in quiz grades?
Classify the following statements as to whether they belong to the area of descriptive statistics or inferential statistics ___________________ 1. At most 5% of SLU students are smokers. ___________________ 2. Assuming that less than 20% of the Kalinga coffee beans were destroyed by a typhoon these past months, we should expect an   increase of no more than P30 for a kilogram of coffee by the end   of the year. ___________________ 3. An employee generalized that the average monthly salary of a regular employee in a certain company is P12,000. ___________________ 4. A study found out that all customers who have received a gift certificate from a store 75% went back to the store to shop. ___________________ 5. The average grade in statistics of 50 students is 83.60. At what level are the following variables measured? _______________ 1. Students rated as superior, above average, average, below average, or poor _______________ 2. The scores of students in a statistics quiz…
Consider the following data relating hours spent studying (X) and average grade on course quizzes (Y):                                                                 X                             Y                                                                 5                              6                                                                 3                              8                                                                 4                              8                                                                 7                              10                                                                 5                              7                                                                 6                              9 From these observations, can we conclude that hours spent studying caused increases in quiz grades? Yes No
It has been determined that there is a significant relationship between the temperature (x) and the number of times that a cricket chirps in a minute (y). Below is a table of values: Temperature Number of chirps 69.7 882 93.3 1188 84.3 1104 76.3 864 88.6 1200 82.6 1032 71.6 960 79.6 900 G. Determine the value of ∑ (x-mean)2, reporting the exact answer which should have 1 decimal place. H. Determine the lower bound of a 95% confidence interval for the slope. Use the T score to 3 decimal places, and the rounded value for answer F. Report answer to 3 decimal places. I. Determine the upper bound of a 95% confidence interval for the slope. Use the T score to 3 decimal places, and the rounded value for answer F. Report answer to 3 decimal places. J. If the level was increased to 99%, what would happen to the margin of error and the size of the interval? increase answer can not be determined decrease remains the same
In each of the following variables, decide which type of data grouping (single-value, limit, or cutpoint) isprobably the best.4a. Number of Bedrooms. The number of bedrooms per single family dwellingb. Ages of Householders. The ages of householders, given as a whole numberc. Sleep Aids. The additional sleep, to the nearest tenth of an hour, obtained by a sample of 100 patientsby using a particular brand of sleeping pill.d. Number of Smartphones. The number of smartphones per person.e. Gas Mileage. The gas mileages, rounded to the nearest number of miles per gallon, of all new carmodels.f. Grammostola. The weight, in grams, of a sample of 50 Grammostola, a variety of tarantulas
What is the P-value for the following scenario: A pet association claims that the mean annual costs of food for dogs and cats are the same. The results for samples of the two types of pets are shown below. At , can you reject the claim? Dogs Cats mean=$239 mean=$203 SD=$32 SD=$21 n=16 n=18 As in Chapter 7, answers need to be correct to three decimal places beyond the first non-zero digit.

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