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A college student wanted to estimate the average amount of time spent texting each day among college students. He randomly sampled 174174 college students and asked them to keep track of how many minutes they spent texting(reading and writingtexts) on a certain day. The average time spent texting in one day for the 174 in the study was 118 minutes. Suppose sigma Subscript Upper XσX is known to be 60 minutes. Assume all conditions are satisfied for inference to all college students.
Computer-generated output indicates that the p-value for the sample is 0.01. Carefully interpret this p-value. At what levels of significance would you reject the null hypothesis?
consider an insurance company that sells hurricane insurance. in the policy the company agrees to pay the amount a if a
find the best predicted weight of a seal if the overhead width measured from a photograph is 2.4 cm. let overhead width
an automobile manufacturer is concerned about a possible recall of its best-selling four-door sedan. if there were a
A study of 20 worldwide financial institutions showed the correlation between their assets and pretax profit to be .86. At the .05 significance level
You read that statistical test at α=0.01 level has probability 0.14 of making a Type II error when specific alternative is true. Calculate the power of test against this alternative?
(a) a white chip on the first draw?
Complete the following tasks: State the multiple regression equation. Interpret the meaning of the slopes in the equation.
A) census bureau data show that the mean household income in the area served by a shopping mall is $62,500 per year. A market research firm questions shoppers at the mall to find out whether the mean household income of mall shoppers is higher..
which of the following statements regarding a negative correlation is true?a. high values of the x variable tend to be
astudy of 31000 hospital admissions in new york state found that 4 of the admissions led to treatment-caused injuries.
Construct a 98 percent confidence interval for the true proportion of ranch style homes
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