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    Hypothesis Testing

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    Calculating the P-value for Coke Fill Levels

    Assume that cans of Coke are filled so that the actual amounts have a mean of 12.00 oz and a stand. dev. of 0.11 oz a) Find the P that a sample of 36 cans will have a mean amount of at least 12.19 oz. b) Based on the result from part a, is it reasonable to believe the cans are actually filled with a mean of 12.00 oz? if t

    Hypotheses Testing: Test of Proportions

    Do a hypotheses testing with 95% probability, to decide whether there is a difference between proportion of male and female that answered "very unlikely" to asked question. Please see the attached file for details.

    Degrees of freedom, value of the test statistic, null hypotheses

    The daily production rates of a sample of sixteen workers in a factory before and after a training program (which was shown to be effective in other plants provided the following results: Use alpha equal to .01 Mean of the difference scores 5 Standard deviation of the difference scores =8 Is this problem, one tail, two tai

    Test of hypothesis using dependent samples...

    Five heart patients were placed on a special diet to lose weight. Their weights (in kilograms) were recorded before the diet and one month after the diet. The following data was obtained. Patient Weight Before Weight After 1 62 59 2 65 63 3 88 78 4 76 75 5 68 65 Do these data suggest that the special diet is effective

    Test of Hypothesis for difference in proportions: A random sample of 200 workers from Factory A showed that 130 were satisfied with their job. Another random sample of 125 workers from Factory B showed that 70 were satisfied with their job. Can it be concluded that the proportion of satisfied workers in Factory A is greater than in Factory B?

    A random sample of 200 workers from Factory A showed that 130 were satisfied with their job. Another random sample of 125 workers from Factory B showed that 70 were satisfied with their job. Can it be concluded that the proportion of satisfied workers in Factory A is greater than in Factory B? Formulate and test the appropriate

    Hypothesis testing: Sample Size

    A market research agency would like to estimate the proportion of Canadian households owning a personal computer. What minimum sample size will be required if they want to be 99% confident that the sample proportion will not differ from the true population proportion by more than 5%?

    Give the null and alternative hypothesis for the test. If you wish your probability to be of (erroneously) deciding that mu>30, when in fact =30, to equal 0.05, what is the value of alpha for the test?

    1) A random sample n=40 observations from a population produced a mean of 30.9 and a standard deviation of 2.4. Suppose that you wish to show that the population mean (mu) exceeds 30. A) Give the null and alternative hypothesis for the test. B) If you wish your probability to be of (erroneously) deciding that mu>30, when i

    Hypothesis Testing

    Based on the question above(see attachment), test the hypothesis that p=0 and p(does not equal)0; use a 0.05 level of significance. What does it indicate? * Pls note:I could not put a "slash through" the "equal" symbol above to represent "does not equal".

    Hypothesis Testing

    In one of the ethnically diverse areas of a large city, a branch manager of a local bank has been receiving complaints from the clients about staff behavior. He has decided to introduce a training program for his staff, and has retained the services of a human resources consultant. Over a weekend, the consultant has invited repr

    Single Exponential Smoothing

    Sunrise sports has experienced rapidly expanding retail sales. Its sales levels for the past 12 years are: (see data in attached file) Develop a single exponential smoothing model using Alpha =0.30 . use as a starting value the average of the first 6 years' data. Determine the forecast value for year 2001. a.) Devel

    Investigating a Null hypothesis with SAS

    A researcher wants to investigate the null hypothesis: Ho : µ1= µ2 = µ3 = µ4 using α = 0.05. Given σ²= 1 and Σ α j² = 2.76, how many subjects j should be assigned to each treatment for power, π = 1 - β ~ .80

    Data Analysis : Null Hypotheses and Normal Distribution

    A random sample of 8 petrol stations in each of three European countries A, B and C was taken. The price per litre at each station was recorded in Euros. The prices are given below. A 7.80 8.00 7.98 8.20 8.00 7.99 8.10 7.90 B 8.01 7.75 8.00 7.77 8.01 8.01 8.12 8.20 C 8.10 7.92 8.01 7.88 8.30 8.22 8.56 8.10 Discuss wa

    Inferential statistics used in hypothesis tests

    What inferential statistic would you choose to test the following hypotheses? Briefly explain your answers. There is a positive relationship between the patient's rating of pain using the Visual Analog scale and the amount of drug administered to the patient. The annual income among male and female nurses differs signifi

    Psychology Statistics 240

    A social psychology graduate student hypothesizes that taller women tend to date taller men, and that shorter women tend to date shorter men. To test this hypothesis, she visits a dance club just off campus and interviews the first 10 couples she meets, measuring (to the nearest centimeter) the heights of the men (X) and the he

    Hypothesis Testing for difference between means. The task force claims that the average cost per visit will be significantly less if the suggestion is adopted. At a 0.05 level of significance, test the claim of the task force.

    Because of massive cutbacks in transfer payments to the provinces, provincial governments are in a quandary over how to maintain a high standard in health care. Given the sensitive nature of the issue, the provinces have set up independant commissions to study the issue. A task force in Alberta has suggested that more "community

    Hypothesis Testing: Testing for proportions

    Joe thinks that no more than 20% of students in his Statistics class will get an A in the final examination. To prove his claim, he takes a random sample of 35 students and finds to his surprise that 30% of students got an A. At a 0.01 percent level of significance can we reject Joe's claim?

    Hypothesis testing is embedded.

    The "Mars" division of a big auotmobile manufacturer specializes in manufacturing scooters for export. The company claims that these scooters average at least 55 miles per gallon in city driving. An independant consumer avocate road tested a sample of 25 scooters. The sample showed an average of 60 miles per gallon, with a stand

    Conclude the Mean Differences

    The manager of a department store wishes to study the number of minutes top salespeople at his store spend at their computer terminals in order to process "end of day closing" by the department name. The manager selected a sample of 5 (five) salespeople from each of three departments. At the .05 significance level, can

    Hypothesis Testing for proportions

    The manufacturer of a nationally known "lite beer" claims that the approval rating for it's product is at least 85%. A local soft drink manufacturer has retained a marketing agency to test the "lite beer". A sample of 500 individuals participated in the test nationally. Out of the sample of 500, 100 indictated that they did not

    Bounce Back

    The makers of Bounce Back glass backboards for basketball gymnasiums have claimed that their board is at least as durable, on the average, as the leading backboard made by Swoosh Company. Products Testing Services of Des Moines, Iowa, was hired to verify this claim. It selected a random sample of 50 backboards of each type and s

    Inferential statistics /3073

    Employer A states the average number of days missed in a year by each staff member is 4.0. Office personnel randomly sampled a portion of their attendance records to determine if this claim was accurate. For the previous year, the following data was obtained from the sample group, regarding absences for that year: 4, 4, 3, 2, 6,

    Hypothesis for Cereal Box Sellers

    A cereal manufacturer sells boxes of cereal that list the weight as 19 oz. A random sample of 60 boxes was taken, with the contents carefully weighed. Assume a mean weight of (random variable?) x = 19.9 oz. and a standard deviation of s = 0.67 oz. resulted from the sample data. would this idicate that the actual mean weight,u of

    Conduting a test of hypothesis

    A national car insurance company stated that in 1987, the average yearly car insurance cost for a family in the U.S. was $931. In the same year, a random sample of 39 families in california resulted in a mean cost of X = $975 with a standard deviation of = 30.50. Does this suggest that the average insurance cost for a family in

    Statistic problem- hypothesis

    A nectarine-packing firm claims that the nectarines they ship have a mean weight of 5.22 ounces. A test on n = 10 randomly selected nectarines, gave the following results, in ounces: 5.94 5.15 5.73 6.31 5.63 5.04 5.10 5.03 5.13 5.21 Do the data indicated that the actual mean weight is less than the mean weight claimed by t

    Z-test on 52 sample to determine p-value and validate conclusion

    Please see the paper enclosed. Perform a Z -test on a 52 sample class (26 samples in the paper + 26 samples in the 2nd attachment), and determine the p-value to validate the conclusion (decision). Please perform all the calculations similar to how it was done in the paper meaning not just giving me the result number but show

    Significance Level: Fairfield Homes

    Fairfield Homes is developing two parcels near Pigeon Fork, Tennessee. In order to test different advertising approaches, they use different media to reach potential buyers. The mean annual family income for 75 people making inquiries at the first development is $150,000, with a standard deviation of $40,000. A corresponding sam

    Estimate the p-value

    The management of Discount Furniture, a chain of discount furniture stores in the Northeast, designed an incentive plan for salespeople. To evaluate this innovative plan, 12 salespeople were selected at random, and their weekly incomes before and after the plan were recorded. Sales Person Before After Sid Mahone $320

    Ms. Lisa Monnin is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information. Sales $ 131 135 146 165 136 142 Audit $ 130 102 129 143 149 120 139 At the .10 significance level, can she conclude that the mean daily expenses are greater for the sales staff than the audit staff? What is the p-value?

    Ms. Lisa Monnin is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information. Sales $ 131 135 146 165 136 142 Audit $ 130 102 129 143 149 120 139 At the .10 significan