Search results

  1. M

    Construct confidence interval: randomly-selected cars have mean age of 7.4 years

    Randomly selected 25 student cars have ages with a mean of 7.4 years and a standard deviation of 3.4 years, while randomly selected 15 faculty cars have ages with a mean of 5.2 years and a standard deviation of 3.3 years. Construct a 99% confidence interval estimate of the difference μs−μf...
  2. M

    Construct margin of error, confidence intrval: mean sales of 85 units of appliance...

    A market research firm supplies manufacturers with estimates of the retail sales of their products from samples of retail stores. Marketing managers are prone to look at the estimate and ignore sampling error. An SRS of 17 stores this year shows mean sales of 85 units of a small appliance, with...
  3. M

    Venn Diagram: prob's P(1)=0.2, P(2)=0.25, P(3)=0.35, P(4)=0.05, P(5)=0.1, P(6)=0.05.

    A sample space contains six sample points and events A, B, and C as shown in the Venn diagram. The probablities of the sample points are P(1)=0.2, P(2)=0.25, P(3)=0.35, P(4)=0.05, P(5)=0.1, P(6)=0.05. Use the Venn diagram and the probabilities of the sample points to find: P(C)= 0.15 _ _...
  4. M

    Help with logs: Suppose that u=log10⁡(4) and v=log10⁡(5)....

    Suppose that u=log10⁡(4) and v=log10⁡(5). Find possible formulas for the following expressions in terms of u and/or v. Your answers should NOT involve any log⁡ 's. I'm trying to find the log(250) and the log(0.064). For log(0.064) I tried doing 0.08(u-v), but it wasn't right and I don't know...
Top