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A marketing research company needs to estimate which of two soft drinks college students prefer. A random sample of N college students produced the followings 98% confidence interval for the proportion of college students who prefer drink A (0.417, 0.477). Identify the point estimate for estimating the true proportion of college students who prefer that drink.
what is the relationship between sample size and the width of the confidence interval? please explain further as to
Find the probability that a sample of 16 tires will have an average tire life of more than 52000 miles, give that the mean tire life is 50000miles and the standard Deviation is 8489.13.
q1. suppose that we will randomly select a sample of 64 measurements from a population having a mean equal to 20 and a
a local pizza restaurant and a local branch of a national chain are located across the street from a college campus.
When assigning probabilities of two simple events, can we assume that each event is always equally likely to occur and, thus assign .5 to each event?
Do the data indicate any significant preferences among the three versions of the photograph? Test at the .05 level of significance.
there are 10 swedes and 7 finns. we should choose a committee that consists of 9 people. the committee has a chairman
A sample of 81 business managers on the West Coast had an average breakfast cost of $7.65. 13. At a = 0.05, what is the test value?
1. the national snow and ice data center nsidc collects data on albedo depth and physical characteristics of ice
The variable Z has a standard Normal distribution. Find the number z that has cumulative proportion 0.85.
Your bakery produces loaves of bread with '1 pound' written on the label. Here are weights of randomly sampled loaves from today's production:
Find a 95% confidence interval for the mean price of all summer sleeping bags.
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